/study-book I had claude write me a 519-page textbook on neural networks.
Not a summary: a whole book covering at good depth all the fundamental knowledge in NNs. It's an open-source skill. Inspired by calebfahlgren's recent post, I wanted to learn anything with material made
GPT-6.1 Sol Ultra vs Opus 5-5 Ultracode.
Two AI agents independently controlled separate computers through computer use and joined the same multiplayer match. Both perspectives in one video. Open-source project coming soon.
Yo AnthropicAI why are you routing opus 3 to the sonnet 5
60% cheaper cache reads.
Higher elo than GPT-6 astra at ~1/5 the cost. Opus 5.5 cache reads cost $0.20 per million tokens, down 60% from Opus 5. That matters because coding agents repeatedly reread the same context on every loop — Anthropic says cache reads make up most of
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