Clauday.

The middle child just beat the flagship. Anthropic shipped Claude Sonnet 5.5 on Monday, September 28, and on Terminal-Bench 4.0 it scores 70.6%. Opus 5.5 scores 66.4%. Sonnet 5, th…

OpenAI dropped GPT-6 Sol and GPT-6 Luna on September 22, nineteen days after Astra. Sol is $2 in and $10 out per million tokens. Luna is $0.10 and $0.50. Both are exactly half of w…

Anthropic shipped Claude Opus 5.5 on September 22, and the interesting part is not the benchmark table. It is the price. Input dropped from $5 to $4 per million tokens, output from…

The anthropics/financial-services repo is trending at 236 stars a day and sitting on 35,300 total, and it is worth looking at even if you will never build a pitch deck. It is the r…

A researcher pulled apart OpenAI's ad measurement stack and found the thing everybody eventually finds. ChatGPT mints a signed JWT containing your account identifier, drops it into…

OpenAI introduced Astra for Law on September 17: GPT-6 Astra wired to a legal search index of more than 230 million URLs, plus the access controls and workflow tooling that law fir…

OpenAI started testing Sponsored Agents in ChatGPT on September 16. When a relevant ad shows up, you can step into a clearly labeled conversation with an agent the advertiser paid …

Google shipped Gemini 3.8 Live and Gemini 3.8 Live Extended Thinking on September 15 at https://blog.google/innovation-and-ai/models-and-research/gemini-models/gemini-3-8-live-gemi…

Typesafe AI came out of nowhere on September 15 with a model called Jev and a category name to go with it: System One Models. The pitch at https://typesafe.ai/blog/introducing-syst…

Security researcher pdfu went through the private frameworks in iOS 27 and the macOS 27 Golden Gate release candidate and found two mechanisms that Apple has not announced. MacRumo…