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AINVIDIA AI Developer announces the winners of a Nemotron hackathon held in South Korea, with a livestream linked for the winners announcement.

AIChip Huyen congratulated Alec Radford, Luke Metz, and Soumith Chintala on winning an ICLR Test of Time award for work published at ICLR 2016. She highlighted that the team's paper was produced by researchers in their twenties without any PhDs among them, and expressed hope that the three collaborate again.

AIAnthropic says three changes to Claude Code, the Claude Agent SDK, and Claude Cowork caused recent quality complaints, and the API was not affected. The fixes were resolved by April 20 (v2.1.116), and the company is resetting usage limits for all subscribers as of April 23.

Why it matters: The postmortem traces three separate changes to specific dates and versions, showing how a bug in context management can look like broad degradation to users.

AICursor's Michael Truell says the company is partnering with the SpaceX team to scale up Composer, calling it a meaningful step toward building the best place to code with AI. The quoted SpaceX post says Cursor gives SpaceX the right to acquire Cursor later this year for $60 billion, or pay $10 billion for the work together. It also cites SpaceX's Colossus training supercomputer, described as a million H100-equivalent system, as a source of training capacity.

AINick Turley of OpenAI reacted with a one-word "good!" to Arena's report that GPT-Image-2 ranked first across all Image Arena leaderboards. Arena cited a 1512 Text-to-Image score, a 242-point lead over the second-place Nano-banana-2 model.

AIOpenAI's Mark Chen rejected the claim that science is no longer a priority, saying AI should accelerate discovery in partnership with scientists. He said Sébastien Bubeck and Helkky are taking on this mandate, which the quoted post frames as a response to reports that OpenAI's VP of Science is leaving.

AINVIDIA AI Developer thanked @Picomoorhead for a contribution to OpenClaw, which the post links to via @openclaw. The post provides no details about what the contribution was or what it enables.

AIThinking Machines has welcomed Luke Drago and @LRudL_, who co-founded Workshop Labs to build AI that keeps humans relevant. Mira Murati says they will continue that mission at Thinking Machines, which builds powerful AI systems that think alongside humans and extend human agency. She ties the hire to the company's broader work, including Tinker, research grants, and advancing the frontier.

AICognition is expanding into Japan, its first step into Asia, and has appointed Takumi Masai as Japan President and General Manager to lead a local team working with Japanese enterprises. DeNA has used Devin to more than double operational efficiency across multiple engineering functions, and Mizuho Securities has deployed it as one of the first large-scale financial institutions in Japan.

AIAwni Hannun invites attendees to Ollama's MLX meetup at Ollama's Palo Alto office this Thursday, April 9, at 6pm. RSVP is required because space is very limited, and food and drinks will be provided.

AIAnthropic's Sam Bowman shared a link to a system card for Claude Mythos Preview. The post itself gives no further details about the model's capabilities, benchmarks, or availability.

AIAnthropic is not releasing Mythos Preview to general availability. Instead, it is giving defenders early, controlled access so they can find and patch vulnerabilities before Mythos-class models spread across the ecosystem.

AIDario Amodei says the company has tracked growing cyber capabilities in AI models for years, which arise from their general coding proficiency. He states that the new model, Mythos Preview, represents a particularly large step up in those capabilities.

AIDario Amodei said many of the world's leading companies have joined Project Glasswing, an effort to address cyber threats posed by increasingly capable AI systems. The initiative was introduced by Anthropic and is powered by its newest frontier model, Claude Mythos Preview, which the quoted post says can find software vulnerabilities better than all but the most skilled humans.

Why it matters: The post gives a concrete example of how a frontier AI lab is organizing industry partners around AI-driven software vulnerability discovery.

AIOpenAI announced applications for its Safety Fellowship, a pilot program supporting external researchers, engineers, and practitioners in safety and alignment research on advanced AI systems. The program runs from September 14, 2026 through February 5, 2027, with a monthly stipend, compute support, API credits, and mentorship, and fellows are expected to produce a substantial output such as a paper, benchmark, or dataset. Applications close May 3, and successful applicants will be notified by July 25.

AIReflection AI announced that Joe Spisak, previously the lead behind Meta's Llama, is joining as VP of Product and Head of Open Source. The post welcomes him to the team without giving further details about his responsibilities or plans.

AICursor cloud agents produced over a million commits over the past two weeks, according to Michael Truell. He said these commits were essentially all AI-generated, with little human intervention needed since the agents run code on their own computers.

AIGuillaume Lample, the account owner associated with Mistral, congratulated the Mistral AI team on their work on a new model and its release. The post names no specific model, version, benchmark, or pricing.

AIAman Sanger says Cursor's team evaluated many base models on perplexity-based evals and found Kimi k2.5 the strongest. Composer 2 was then built with continued pretraining and a 4x scale-up of high-compute RL, with Fireworks providing inference and RL samplers. The author admits Cursor should have named the Kimi base in its launch blog and says it will do so for the next model.

AIAman Sanger of Cursor says Composer 2 is a really good model and he is excited for more people to try it. The quoted reply from Lee Robinson says Composer 2 started from an open-source base, with only about one-quarter of the final model's compute coming from that base. Cursor plans full pretraining in the future and says it is following the license through its inference partner terms.

AILilian Weng says she is building technologies for better human-AI collaboration on next-generation hardware at scale. The post links to a Thinking Machines announcement of a partnership with Nvidia to power frontier model training and customizable AI platforms.

AIChris Olah, a researcher at Anthropic, shares a Just Security article analyzing the designation of Anthropic as a supply chain risk. The post is brief and links to the article, which is written by a former National Security Council counsel.

AIYi Tay announced that Ni Jinjie has joined Google DeepMind's Singapore branch as a research scientist. Nijinjie will work on Gemini scaling and reinforcement learning under Tay and Quoc Le.

AIGeorgetown law professor Mark Zhia predicts a court would likely find the government's treatment of Anthropic arbitrary and capricious under the APA. He argues OpenAI and Anthropic pose similar security risks, yet the government immediately contracted with OpenAI while treating Anthropic worse than Chinese AI firms.

AIMckay Wrigley reposted a statement from @SecWar accusing Anthropic of refusing the Department of War unrestricted access to its models for lawful purposes. The quoted statement directs the Department of War to designate Anthropic a Supply-Chain Risk to National Security, bars contractors from commercial activity with Anthropic, and allows Anthropic services for no more than six months. The author's own added text says only that he finds the situation horrifying and supports Anthropic.

Why it matters: The quoted statement is a direct government action against a named AI lab, giving readers a primary-source view of a dispute over military access to AI models.

AIChatGPT has crossed 900 million weekly users and 50 million paying subscribers, according to OpenAI's Nick Turley. He says people use it for writing, building, research, trip planning, shopping, and everyday tasks, and that growing usage is helping improve response speed, reliability, and naturalness.

AIAletheia, a math research agent, autonomously solved 6 of 10 FirstProof problems without modification, the best result in the inaugural challenge. The author says this is bigger than the IMO-gold achievement from last year, and the results were evaluated by experts with best-of-2 scoring.

AIQuoc Le announced that Aletheia, a math research agent, autonomously solved 6 of 10 FirstProof problems, the best result in the inaugural challenge. The post says this exceeds last year's IMO-gold achievement and points to a paper and thread for full details. The accompanying figure shows 10 unmodified problems, 6 candidate solutions per agent, and expert evaluation yielding 6 solved problems on a best-of-2 basis.

AIChris Olah, the account owner of which is Anthropic, shared two Greenhouse job listings and invited applications. The post itself gives no details about the roles, teams, or requirements.

AIJakub Pachocki, OpenAI's account holder, says that after official #1stProof commentary, community analysis, and external expert review, the team now believes its solution to problem 2 is likely incorrect. He thanked reviewers for their engagement and said the team looks forward to continued review.

AIGoogle DeepMind researcher Oriol Vinyals announced he is moving back to California after ten years in London, to keep working on Gemini and toward AGI. The post is a personal update with no product, benchmark, or technical details.

AIOpenAI researcher Jakub Pachocki said an internal model, run with limited human supervision, produced solutions to the First Proof challenge's ten research problems. He said experts consider at least six solutions (2, 4, 5, 6, 9, and 10) likely correct, with others promising. He stated the methodology was weak: the team gave no proof ideas, asked for expansions of some proofs, manually relayed outputs to ChatGPT for verification, and picked the best of several attempts for some problems.

AIMax Woolf reacts to Claude Code's run-rate revenue growing past $2.5 billion, more than doubling since the start of 2026. He asks whether the doubling of weekly active users since January 1 in roughly six weeks is inflated by holiday effects.

AIStability AI has joined the Tech Coalition, a global alliance of technology companies working to combat online child sexual exploitation and abuse. The company had joined the coalition's Pathways program in 2025 to strengthen its child safety practices before becoming a full member.