Engineering posts and filtered news from Anthropic and OpenAI. Updated daily at 06:00 UTC.
Our most capable models for daunting technical work, Claude Fable 5.2 and Claude Mythos 5.2 set a new bar in coding, finance, and the sciences.
Read on anthropic.com: Introducing Claude Fable 5.2 and Claude Mythos 5.2 (opens in a new tab)Claude Haiku 5.5 is our fastest, most capable small model. Built for high-volume work like summarization, subagents, and browser use.
Read on anthropic.com: Introducing Claude Haiku 5.5 (opens in a new tab)Claude Opus 5.5 leads in agentic coding and knowledge work, and costs 40% less to run than Opus 5 on typical workloads.
Read on anthropic.com: Introducing Claude Opus 5.5 (opens in a new tab)The inside story of how Claude Code went from an internal CLI to Anthropic's coding agent, told by researchers, engineers and early users who built it.
Read on anthropic.com: The making of Claude Code (opens in a new tab)For Claude to learn from experience, it has to decide what’s worth remembering before it knows what’s next. Here’s how “dreaming” helps it organize memory and…
Read on anthropic.com: The components of agent memory (opens in a new tab)As our merges per day grew more than tenfold, source control became our biggest development bottleneck. Here, we share how we migrated to an in-house version…
Read on anthropic.com: Redesigning source control at Anthropic (opens in a new tab)Harness design is key to performance at the frontier of agentic coding. Here's how we pushed Claude further in frontend design and long-running autonomous…
Read on anthropic.com: Harness design for long-running application development (opens in a new tab)What we learned from three iterations of a performance engineering take-home that Claude keeps beating.
Read on anthropic.com: Designing AI-resistant technical evaluations (opens in a new tab)CodeRabbit uses OpenAI models to govern and trust AI-generated code and Codex to ship 20 times more software with the same engineering team.
Read on openai.com: CodeRabbit scales agentic software development and ships 20x more (opens in a new tab)OpenAI introduces BioBasicsBench, a 100-task benchmark measuring how well AI agents interpret raw experimental data and handle everyday wet-lab science.
Read on openai.com: Measuring how AI agents handle everyday wet-lab science (opens in a new tab)Cult.fit is using Codex to help teams across functions build tools, move faster, and change how work gets done.
Read on openai.com: Cult.fit builds operational muscle with Codex (opens in a new tab)Introducing GPT‑6 Cyber, OpenAI’s cybersecurity model for finding exploitable vulnerabilities and developing fixes, trained to stay within authorized scope.
Read on openai.com: GPT‑6 Cyber: Advancing the frontier of aligned cybersecurity agents (opens in a new tab)Merge uses GPT-6 Astra, ChatGPT, and Codex to review product code and support marketing. Its teams also use AI to plan executive dinners and prepare sales…
Read on openai.com: Merge builds product and business tools with OpenAI technology (opens in a new tab)Images 2.6 brings faster image generation, GIF creation, more precise editing, and new API controls across ChatGPT, Codex, and the API.
Read on openai.com: Introducing Images 2.6 (opens in a new tab)Discover how ChatGPT and Codex are helping engineers accelerate CAD, PCB design, simulation, and other workflows across the physical world.
Read on openai.com: Accelerating engineering for the physical world (opens in a new tab)How OpenAI built Pando, a Git-compatible backend designed for the scale of development that Codex makes possible.
Read on openai.com: Scaling Git at OpenAI (opens in a new tab)OpenAI’s Grid Protectors Program will work with utilities to help future compute campuses support grid reliability and protect consumer electricity costs.
Read on openai.com: Introducing the Grid Protectors Program (opens in a new tab)Qodo brings company knowledge and coding standards into Codex, helping developers catch P0 issues across repositories before opening a pull request.
Read on openai.com: Qodo builds context into AI code review with Codex (opens in a new tab)OpenAI uses layered monitoring to detect frontier model misalignment and unauthorized agent behavior so responders can intervene before incidents escalate.
Read on openai.com: How we detect frontier model misalignment (opens in a new tab)See how Legora uses OpenAI models, ChatGPT, and Codex to accelerate legal workflows, expand contract analysis, and free lawyers to focus on higher-value work.
Read on openai.com: Legora is building the agentic operating system for legal work (opens in a new tab)How Greptile uses GPT-6 Astra to test user workflows, Daybreak to strengthen security, and Codex to reduce rework.
Read on openai.com: Greptile takes bug detection beyond code review with GPT-6 Astra (opens in a new tab)Delivering fast and capable computer use at scale
Read on openai.com: Introducing GPT-6.1 Terra (opens in a new tab)OpenAI shares model results on the Kakeya conjecture, Exponential Time Hypothesis, and quantum chromodynamics—and how researchers can verify and build on them.
Read on openai.com: Working with academic communities to build scientific understanding (opens in a new tab)Fast, focused, low-cost decisions for any application.
Read on openai.com: Build more responsive apps with the Decisions API (opens in a new tab)Patch the Planet connects security researchers, maintainers, and incident responders to help address critical vulnerabilities across open source.
Read on openai.com: Patch the Planet: global response coordination as agents uncover critical vulnerabilities (opens in a new tab)See how OpenAI, PerturbAI, and Scripps Research used distributed AI agents to uncover promising research leads in data from millions of brain cells.
Read on openai.com: Using thousands of AI agents to uncover new leads in biological data (opens in a new tab)Learn how OpenAI is improving ChatGPT across low-resource programming languages, with new evaluations for software engineering, SQLite, and COBOL migration.
Read on openai.com: Advancing coding in low‑resource programming languages (opens in a new tab)With ia.i, a conversational interface, and the IARA governance platform, Itaú is applying its AI First strategy to customers and employees—in one of Brazil’s…
Read on openai.com: How Itaú is building generative AI for its entire customer base (opens in a new tab)