ai Voice goes full-duplex, benchmarks under fire
OpenAI's GPT-Live Ditches Turn-Based Voice for Real-Time Two-Way Conversations
OpenAI launched GPT-Live, a full-duplex voice model that listens and speaks simultaneously, replacing the turn-based pattern of earlier ChatGPT voice mode. For complex queries, the system offloads reasoning to GPT-5.5. Simon Willison, who had preview access in the iPhone app for several weeks, described the new model as a significant improvement over its predecessor.
OpenAI Retracts SWE-Bench Pro After Finding 30% of Tasks Broken
OpenAI audited SWE-Bench Pro and found roughly 30% of its tasks are broken, and retracted its own prior recommendation of the benchmark as the leading coding eval. The finding matters because multiple labs have cited SWE-Bench Pro scores as evidence of coding capability gains. It is now unclear how much of the progress measured on the benchmark reflects real capability improvement versus artifacts of the broken tasks.
xAI's Grok 4.5 Tops SaaS Automation Benchmark at a Quarter the Cost
xAI's Grok 4.5 topped Artificial Analysis's AutomationBench-AA with a 51% score, completing more SaaS workflow objectives than any rival while costing one-quarter as much per task. The benchmark tests end-to-end completion of real software-as-a-service workflows rather than isolated code generation, making the cost advantage particularly relevant for production deployments.
Prime Intellect Raises $130M to Open RL Training Labs Once Locked Inside OpenAI
Prime Intellect raised $130M led by Radical Ventures to give any company access to the same reinforcement learning training infrastructure used by frontier AI labs. The startup has positioned itself as a provider of RL training capabilities that previously required either building in-house at substantial cost or operating inside a frontier lab. The round signals investor conviction that RL infrastructure is becoming a standalone product category.
PyTorch 2.13 Ships 12x Faster Attention and 4x Memory Savings for LLM Training
PyTorch 2.13 ships FlexAttention on Apple Silicon, delivering attention operations up to 12x faster than prior implementations. The release also includes a fused loss that cuts GPU memory consumption by 4x and a new distributed communications backend for large clusters. The memory reduction is significant for anyone fine-tuning large language models on constrained hardware.
Quoting Kenton Varda
Cloudflare co-founder Kenton Varda declared a moratorium on AI-written PR descriptions, commit messages, and issue tickets from his team. Varda said AI-generated change descriptions were worse than useless during code review, outlining implementation details while omitting the reasoning that would help a reviewer understand whether a change is correct. Simon Willison published the quote as a counterweight to enthusiasm about AI coding tools.
Agentic safety triggers aren't textual safety triggers; MCP attacks that beat SOTA guardrails more than half the time
Researchers at r/MachineLearning documented MCP-based attacks that bypass state-of-the-art safety guardrails more than half the time. The key finding is that agentic safety triggers are not the same as textual safety triggers: existing guardrails are built to classify prompt text, but agents with real tool access face a different attack surface where the malicious instruction arrives through tool responses rather than the initial prompt. Code and datasets were published alongside the post.
Google's Android Bench Crowns Claude Fable 5 Top AI Coding Assistant at 84.5
Google's Android Bench updated its leaderboard with eight new models, crowning Claude Fable 5 the top AI coding assistant at 84.5%. The benchmark switched to the Harbor Framework and opened community contributions. Fable's lead on a benchmark run by a direct competitor is notable given Google's own models were also evaluated.
tencent/Hy3
Tencent released Hy3 under Apache 2.0, a 295B-parameter mixture-of-experts model with 21B active parameters and 3.8B MTP layer parameters. Following a preview launch, the full model ships with an open license that allows commercial use. Chinese labs releasing large open-weight models continues a pattern that has put pressure on proprietary providers to justify their pricing.
Artificial Analysis Fixes the Benchmark That Let Bad TTS Models Win
Artificial Analysis launched a voice cloning leaderboard that controls for voice selection bias, which had allowed worse text-to-speech models to win earlier rankings by pairing with easier-to-clone voices. The controlled methodology puts Cartesia Sonic 3.5 at the top. The benchmark change alters the apparent competitive ranking enough that results from prior leaderboards are not directly comparable.
DeepSeek's New AI Speed Hack Is Amazing
Two Minute Papers analyzed recent AI capability advances and described them as marking an inflection point in how models are being deployed and benchmarked.
Runway Adds ByteDance's Seedream 5.0 Pro With 15-Language Text Rendering
Runway integrated ByteDance's Seedream 5.0 Pro with region-precise editing, layer separation, and native text rendering in 15 languages for video design workflows.
Google DeepMind's Gemini 3.1 Flash Lite Image Generates Photos 2.7x Faster
Google DeepMind's Gemini 3.1 Flash Lite Image generates photos 2.7x faster than its predecessor while ranking in the top 5 for text-to-image quality, though it stumbles on editing tasks.
Pika's Director's Suite Lets One AI Agent Direct Your Entire Video
Pika's Director's Suite is an invite-only agent powered by Claude that automates video production from concept to final cut, handling storyboards, character references, clip generation, and timeline editing.
Krea Adds ByteDance's Seedream 5.0 Pro With Pixel-Level Editing and 15-Language Support
Krea added ByteDance's Seedream 5.0 Pro to its platform, bringing pixel-level editing, multi-layer separation, and reference image fusion capabilities to design and development workflows.
Factory's Droid Lets Developers Click and Edit AI Code Without Switching Windows
Factory's Droid desktop app now includes in-place previews, visual design mode, and inline code review so developers can edit AI-generated code without leaving their environment.
[AINews] SpaceXAI launches Grok 4.5, first Opus-class model post Cursor acquisition
Latent Space reported SpaceXAI launched Grok 4.5, positioning it as an Opus-class model that followed the Cursor acquisition and continues the lab's pace of deployment.
Data for Agents
Hugging Face released guidance on data preparation for training AI agents, addressing a gap in publicly available resources for agentic system development.
Native-speed vLLM transformers modeling backend
Hugging Face released a native-speed backend for vLLM with transformers modeling, improving inference performance for models running on Hugging Face infrastructure.
Expanding Managed Agents in Gemini API: background tasks, remote MCP and more
Google announced expanded Managed Agents in the Gemini API, including background task support, remote MCP integration, and additional capabilities for production-ready agent development.
Agentic safety triggers aren't textual safety triggers; MCP attacks that beat SOTA guardrails more than half the time (code + dataset) [R]
Reddit machine learning research surfaced that agentic safety concerns differ fundamentally from textual safety; MCP attacks bypass SOTA guardrails more than 50 percent of the time when agents have tool access.
This thermal camera uses AI to help ships avoid hitting whales 🐋👀 #trendingshorts #science #ai
Rowan Cheung documented how thermal AI cameras are helping ships avoid hitting whales by detecting marine mammal signatures in ocean waters, demonstrating practical AI applications in marine conservation.
software Bun rewrites itself; sqlite-utils ships 4.0
Rewriting Bun in Rust
Bun's creator Jarred Sumner rewrote the JavaScript runtime from Zig to Rust and published a detailed account of the process. The rewrite, which Sumner had been promising since May 9, was completed before the blog post was finished. Simon Willison described it as a detailed account of the engineering tradeoffs involved in switching systems languages on a mature, performance-sensitive project.
sqlite-utils 4.0, now with database schema migrations
Simon Willison released sqlite-utils 4.0, the 124th release of the project and the first major version bump since November 2020. The release introduces database schema migrations and includes breaking changes described in an upgrade guide. Much of the work in recent release candidates was reviewed by Claude Fable 5.
Introducing Meerkat: an experiment in global consensus
Cloudflare Research published a description of Meerkat, a global consensus service built on a new algorithm called QuePaxa. The project aims to provide a strongly consistent, fault-tolerant key-value store suitable for globally distributed applications. Cloudflare framed it as experimental infrastructure that may eventually support applications requiring strict coordination across regions.
Your Worker can now have its own cache in front of it
Cloudflare launched Workers Cache, a regionally tiered cache that sits directly in front of Worker entrypoints and is configured via standard HTTP headers. The product makes caching composable with the existing Workers programming model without requiring separate cache infrastructure. Developers can now define cache behavior in code and have it apply at the regional edge.
Tech jobs market in 2026, part 3: hiring managers & job seekers
The Pragmatic Engineer surveyed 50 or more hiring managers and job seekers to produce a third installment of its 2026 tech jobs market series. Key findings include a market where candidates and companies struggle to find each other, AI-related roles as the hottest hiring category, and a notably difficult environment for engineering leadership positions. The report is based on direct accounts from practitioners rather than aggregated job posting data.
Rewriting Bun in Rust
Jarred Sumner completed his rewrite of Bun from Zig to Rust, documenting detailed architectural changes, performance considerations, and the engineering rationale behind the language shift.
sqlite-utils 4.0, now with database schema migrations
Simon Willison released sqlite-utils 4.0, the first major version since November 2020, introducing database schema migration support alongside breaking changes documented in a dedicated upgrade guide.
The Pragmatic Engineer AMA
The Pragmatic Engineer's Gergely Orosz conducted an AMA addressing listener questions on AI adoption, hiring practices, career decisions, and how engineering teams are adapting to model-assisted development.
Introducing Meerkat: an experiment in global consensus
Cloudflare Research released Meerkat, an experimental global consensus service using a new QuePaxa algorithm, designed to build strongly consistent, fault-tolerant key-value stores and other distributed applications.
Cloudflare proudly joins the UK government's Cyber Resilience Pledge
Cloudflare announced it joined the UK government's Cyber Resilience Pledge, a voluntary framework committing to foundational cyber security governance, board-level accountability, and supply chain rigor standards.
Your Worker can now have its own cache in front of it
Cloudflare launched Workers Cache, a regionally tiered cache positioned directly in front of Worker entrypoints and configured via standard HTTP headers for composable caching strategies.
Building Agents that Don't Break Themselves
Fly.io published guidance on building agents that don't break themselves, recommending that teams sandbox risky operations in isolated Sprites to prevent agents from corrupting their own environments.
Now Go Build CTO Fellowship: Season 2
Werner Vogels announced the second season of the Now Go Build documentary series, featuring five episodes with technology leaders solving hard problems in healthcare and education.
Vercel Agent: An agent you can let near production
Vercel launched Vercel Agent, designed to safely operate near production systems with built-in guardrails and monitoring for autonomous software development workflows.
Vercel acquires Better Auth to accelerate open source auth
Vercel acquired Better Auth, an open-source authentication framework, to accelerate the development of authentication solutions and integrate them into Vercel's platform.
Why AI Infrastructure must evolve for Agent Experience; Akshat Bubna, Modal CTO
Modal CTO Akshat Bubna discussed why Agent Experience is working now and shared lessons learned building Modal's agent cloud infrastructure for handling agentic workloads at scale.
Did Transformers Kill YOLO?
CodeEmporium examined whether transformer-based architectures have displaced YOLO-style detection models, analyzing trade-offs in latency, accuracy, and deployment complexity.
pharma FDA leadership in limbo; AstraZeneca trial fails
STAT+: White House reviewing top contenders to lead FDA
The White House is reviewing finalists for FDA commissioner, with a decision expected soon. The position has been vacant long enough that the agency's leadership structure has become a subject of concern for industry and public health advocates. STAT reported that the narrowing of candidates to a finalist pool suggests an announcement is imminent.
STAT+: AstraZeneca, Ionis report major trial failure with heart disease drug
AstraZeneca and Ionis reported a significant trial failure in transthyretin amyloid cardiomyopathy, a heart disease market that has become increasingly competitive. The drug, Wainua, did not meet its primary endpoint. The failure is notable because ATTR-CM has attracted multiple drug developers and the market was seen as a near-certain growth opportunity given the aging population and the success of earlier treatments.
STAT+: RFK Jr. plans to create list of injuries caused by Covid-19 vaccines
RFK Jr. plans to create a formal list of injuries caused by Covid-19 vaccines, modeled on existing injury compensation tables. The conditions that may qualify for the list are not yet clear, and outside experts are watching the process carefully. Critics worry the list could be used to undermine vaccine confidence; supporters argue it formalizes an acknowledgment process that already exists informally.
STAT+: In private meeting, Trump officials push to onshore generic drugmaking
Marco Rubio, RFK Jr., and Chris Klomp met privately with industry leaders to push for onshoring generic drug manufacturing in the United States. The administration framed domestic generic production as a national security and supply chain resilience issue. Generic drugs account for roughly 90% of U.S. prescriptions by volume, but a large share of active pharmaceutical ingredients are manufactured abroad.
STAT+: 931 days. The drug approval scandal hiding in plain sight
Northwest Biotherapeutics submitted its brain cancer treatment to the FDA 931 days ago. The drug has not been approved or rejected. STAT reported that the delay is an outlier even by the standards of complex biologics review, and that the company has been unable to obtain a clear timeline from the agency. The case has become a focal point for critics of FDA review timelines for serious conditions.
Opinion: Who benefits from classifying obesity as a disease?
Max Moser argued in STAT that classifying obesity as a disease has benefited pharmaceutical companies selling GLP-1 drugs more than it has benefited patients. He drew a parallel to the antidepressant era, when disease framing expanded the treatable population and created durable markets. Moser did not argue that GLP-1 drugs are ineffective; he questioned whether the disease framing shapes prescribing and coverage decisions in ways that serve commercial rather than clinical interests.
Who's going to run the FDA?
STAT News published a digest of recent health policy developments, including updates on FDA commissioner candidates, drug approval timelines, and regulatory decisions affecting pharmaceutical manufacturers.
STAT+: 931 days. The drug approval scandal hiding in plain sight
Northwest Biotherapeutics' brain cancer immunotherapy has been pending FDA approval for 931 days, surfacing systemic delays in regulatory review timelines for advanced cellular therapies.
STAT+: AstraZeneca, Ionis report major trial failure with heart disease drug
AstraZeneca and Ionis announced a major trial failure for their ATTR cardiomyopathy drug, marking a setback in an increasingly competitive market where multiple therapeutic approaches are competing for dominance.
What happens on 'MAHA Monday'?
STAT reporters covered 'MAHA Monday' at the Great American State Fair, documenting how the Trump administration's Make America Healthy Again agenda is manifesting in grassroots health discussions.
STAT+: The quest to save Grace; and clear the way for rare disease patients everywhere
Matt Wilsey's quest to develop a cure for his daughter's rare genetic disease (NGLY1 deficiency) is shaping how venture-backed research firms approach rare disease drug development and patient advocacy.
Opinion: Who benefits from classifying obesity as a disease?
Max Moser argued that obesity's classification as a disease is shaping which populations benefit most from GLP-1 therapy, drawing parallels to how antidepressant adoption reshaped mental health treatment access.
Opinion: Your grandparents are using cannabis. Doctors can help them do it safely
A physician with 25 years of experience treating medical cannabis patients argued that doctors can help elderly patients use cannabis safely, countering stigma that discourages older adults from exploring the treatment.
STAT+: RFK Jr. plans to create list of injuries caused by Covid-19 vaccines
RFK Jr. plans to create an official injury table for COVID-19 vaccines, though it remains unclear which conditions will be included; outside experts are closely monitoring the policy's development.
STAT+: White House reviewing top contenders to lead FDA
The White House is reviewing finalists to lead the FDA, with the announcement expected soon; the selection will shape regulatory priorities around drug pricing, safety standards, and industry engagement.
STAT+: Mass General Brigham, nurses called to talk at State House amid biggest nursing strike in Mass.
Brigham and Women's Hospital nurses struck over contract negotiations with Mass General Brigham, marking the largest nursing strike in Massachusetts history amid broader healthcare labor tensions.
STAT+: In private meeting, Trump officials push to onshore generic drugmaking
Trump officials including Marco Rubio and RFK Jr. urged pharmaceutical industry leaders to increase generic drug manufacturing in the United States during a private meeting.
Bryan Johnson's chronic disease is notoriously difficult to diagnose
Bryan Johnson's recent autoimmune gastritis diagnosis illustrates why this chronic condition is notoriously difficult to diagnose, requiring months of testing and specialist coordination.
healthtech Nursing strikes, Bryan Johnson, and hospital labor
STAT+: Mass General Brigham, nurses called to talk at State House amid biggest nursing strike in Mass.
Mass General Brigham and nurses at Brigham and Women's Hospital were called to the Massachusetts State House for talks amid what STAT described as the largest nursing strike in the state's history. The Brigham, a nationally prominent Harvard teaching hospital, has been negotiating a new contract with nurses for months without reaching agreement. The dispute centers on staffing ratios and compensation.
Bryan Johnson's chronic disease is notoriously difficult to diagnose
Bryan Johnson disclosed he has autoimmune gastritis, a condition that is notoriously difficult to diagnose because its symptoms overlap with a wide range of gastrointestinal disorders. STAT explained the diagnostic challenge: autoimmune gastritis is defined by the immune system attacking the stomach's parietal cells, but the resulting symptoms, including fatigue, vitamin B12 deficiency, and anemia, typically appear years after the underlying damage begins.
STAT+: The quest to save Grace; and clear the way for rare disease patients everywhere
Matt Wilsey has spent years trying to develop a drug for his daughter Grace, who has NGLY1 deficiency, an ultra-rare genetic disorder with no approved treatment. STAT reported on how his quest is shaping the broader path for rare disease drug development, including his work with Grace Science Foundation and what regulatory pathways exist for conditions with too few patients to run traditional trials.
What's new in biology: July 2026
Works in Progress published its July 2026 biology roundup, covering a synthetic cell made via chemistry, laser phase plate electron microscopy, the first base-edited human embryo, and lab-grown eggs and sperm. Each item represents a technique that either did not exist or was not demonstrated at this scale in prior years. The base-edited human embryo entry in particular marks a threshold that bioethicists have been tracking.
economy Tariffs still passing through; land was once made
The Real Reason European Cars Can't Compete
Patrick Boyle examined why European automakers cannot close the cost gap with Chinese electric vehicle manufacturers. His analysis traced the structural disadvantages to battery manufacturing scale, supply chain integration depth, and the legacy costs of internal combustion engine expertise that European brands built over decades. Industrial policy differences between the EU and China account for part of the gap, but Boyle argued the supply chain and scale advantages are not easily replicated through subsidy alone.
More Tariff Pass‑Through Is in the Pipeline
The NY Fed found that more tariff cost pass-through to consumers is still in the pipeline. Many businesses saw costs rise sharply over the past year but have not yet fully passed them on, absorbing the increases through margin compression or deferring price hikes. The analysis suggests reported inflation from tariffs understates the eventual consumer impact.
Effect of Tariffs on U.S. Small Businesses
The NY Fed used data from the 2025 Small Business Credit Survey to assess how recent tariffs have hit small businesses. The survey found widespread cost increases, with many small firms unable to fully pass costs to customers due to competitive pressure. Small businesses that rely on imported inputs but sell into price-sensitive domestic markets faced the sharpest margin pressure.
Why we stopped making land
Zigmund Forrest and Maxwell Tabarrok published in Works in Progress that roughly 8% of the land in America's major coastal cities was underwater in the 1890s and has since been reclaimed. Half of Boston's current land area and a quarter of Manhattan were raised from the sea before 1970. The piece traced why land reclamation stopped, pointing to environmental regulation and changed property rights frameworks rather than any technical barrier.
JD Vance's crusade against GDP is wrong and bad
Noah Smith argued that JD Vance's stated skepticism of GDP as a welfare measure is wrong in both analysis and policy implication. Smith acknowledged that GDP has real limitations as a welfare metric but contended that Vance's framing, which treats GDP growth as orthogonal to or in tension with American prosperity, is empirically unsupported. Making Americans poorer, Smith wrote, does not make society better by any measure Vance has articulated.
Single-payer health care systems are looking worse all the time
Tyler Cowen argued in a Free Press piece that single-payer health systems are performing worse over time relative to mixed systems, particularly for complex or novel conditions. Government-run systems, he wrote, handle routine care adequately but struggle with innovation-dependent treatments, where speed of adoption and pricing flexibility matter more. The piece drew on recent comparative outcomes data across OECD countries.
Land Reclamation!
Historians document that half of Boston's land, a quarter of Manhattan, and 15 percent of San Francisco were raised from the sea before 1970; contemporary land reclamation could relax the constraint that shaped modern cities.
Slinky Dog and Pricing Mechanics
Kyla Scanlon created a short video explaining pricing mechanics through the lens of Slinky Dog toys, illustrating how consumer products embody economic principles.
The tomb of Duns Scotus
Tyler Cowen reflected on Cologne's Cathedral and related architectural achievements, discussing aesthetic merit and historical context of European landmarks.
Just wondering what the correct model of Iran is here
Tyler Cowen reconsidered his position on a recent conflict, acknowledging that the course of events diverged from earlier predictions and updating his model of the situation.
Wednesday assorted links
Tyler Cowen's Wednesday assorted links covered fragility in digital money systems, regulatory uncertainty around Japanese electric baths, and new findings on internal neural patterns in Claude.
What to Watch and Not
Tyler Cowen reviewed Spider-Noir and other recent streaming series, praising the noir series for its Raymond Chandler aesthetic and Nicholas Cage's performance.
Missing women on Indian streets
Researchers used GPS-linked wearable cameras and randomized street audits across greater Mumbai to measure women's presence on city streets, finding significant gender disparities in public space usage.
Can AI models consent to their own constitutions?
Nick Caputo argued that AI constitutions like Claude's Constitution are real governance instruments that merit examination for their legitimacy and whether AI systems can consent to constitutional constraints.
Tuesday assorted links
Tyler Cowen's Tuesday assorted links highlighted AI security surveys for U.S. government, vacancy tax effects, Substack's role in philosophy, and AI companies hiring philosophers.
From Prediction Markets to Decision Markets and Beyond!
Arin Dube highlighted prediction markets' power, noting one Maine Democratic primary candidate's dropout probability exploded from 9 percent to 96 percent following a new scandal.
What should I ask Liaquat Ahamed?
Tyler Cowen solicited questions for an upcoming conversation with Liaquat Ahamed, author of Lords of Finance and Pulitzer Prize winner for history.
CityRX
Kyla Scanlon created a short-form video on CityRX, exploring economic dynamics in healthcare service delivery models.
The Truth About Investing at All-Time Highs
Ben Felix examined whether investing at all-time highs is prudent, analyzing historical returns and market timing mythology for retail investors.
Effect of Tariffs on U.S. Small Businesses
Liberty Street Economics analyzed the effect of recent tariff implementation on U.S. small businesses using data from the 2025 Small Business Credit Survey, finding significant sectoral variation in impact.
Credit constraints and housing market access
Bank of England researchers examined the Help-to-Buy programme's effect on housing market access, finding it reopened the 95 percent loan-to-value mortgage segment for first-time buyers.
More Tariff Pass‑Through Is in the Pipeline
Liberty Street Economics examined how businesses are responding to tariff pass-through dynamics, tracing complex decisions around pricing strategy and cost allocation.
What Do Over 3,000 Bank Runs Teach Us About Banking Crises?
Liberty Street Economics analyzed the role of bank runs in triggering financial crises, synthesizing evidence from over 3000 historical run episodes to distinguish runs as markers versus mechanisms.
Using AI to Let History Speak About Bank Runs
Liberty Street Economics used large language models to extract historical information on bank runs from archival sources, demonstrating how AI enables new approaches to economic history research.
Shifts in Non-Cash Payments
Timothy Taylor analyzed Federal Reserve Payment Study data for 2024, documenting shifts in non-cash payment methods used by consumers, businesses, and government entities.