The name is the button.

An agent writes the code now, and a human thumb hovers over Accept all a hundred times a day. The honest question of this decade is what, exactly, you just accepted. So I read the diff.

Eight years as a backend engineer in Stockholm, back in Tokyo since 2023, and I still ship something small most nights, usually badly. My one rule: the only real review of a model is the thing you built with it. That is why there is no leaderboard on this site.

Around a hundred and forty sources come through — the labs' own posts, the papers, the tools, the runtimes and languages nobody is watching yet, the chip under the demo, and the newsletters people actually forward. What is moving gets counted so the week reads at a glance, and every few days I explain one mechanism in plain words.

A story here is a headline, a short excerpt, one image and the link to whoever wrote it. We never reproduce the post; the images belong to their authors. A post written in Japanese appears in Japanese, exactly as it was published, and the link goes to the original.

— Yuki Halvorsen, Tokyo

← Accept All Archive

The New StackGitHub

Anthropic releases Opus 5.5 and cuts pricing by 20%. Your agent calls might secretly get routed to an older model.

September 22

Claude Opus 5.5 is here , and Anthropic has lowered the price. The new model, released on Tuesday, costs $4 per million input tokens and $20 per million output tokens, 20% less than Opus 5 , with…

Models & releases Agents & vibe coding

Read at The New Stack ↗

One letter a week, in your inbox.

Latest

Anthropic releases Opus 5.5 and cuts pricing by 20%. Your agent calls might secretly get routed to an older model.

Related

GitHubGrok Build vs. Claude Code: I tested which one has the better memory The New Stack

GitHubAWS open-sources an AI agent it says is 45% cheaper than Claude Code and Codex The New Stack

AsiaAlibaba reportedly testing QwenBook as a tablet-like agent computer TechNode

GitHubGrok 4.7 is now available in GitHub Copilot GitHub Changelog

Toolsv2.1.277 Claude Code releases

SiliconWhen to Use Encode-Prefill-Decode Disaggregation to Accelerate Multimodal Model Serving NVIDIA Technical Blog