Claude Opus 5.5 (Adaptive Reasoning, Max Effort, Default Fallback) is amongst the leading models in intelligence, but somewhat expensive when comparing to other models of similar price. The model supports text and image input, outputs text, and has a 1M … Read more
We’re introducing Claude Opus 5.5, the first model in our new Claude 5.5 family. It performs at the level of Claude Fable 5.1 on most work and costs 40% less to run than Opus 5. Claude Opus 5.5 is our … Read more
“Give overly-eager chatbot control over your personal email” probably has so many failure modes, we haven’t even thought of one tenth of them yet. We’ve got a few years of this ahead of us. Pass the popcorn. (I see a … Read more
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Starting today, Claude Cowork and chat are merging into one Claude. Bring a quick question, or hand over a report due at noon, and Claude takes it from there, even after you’ve closed your laptop. It’s rolling out on Pro … Read more
Problem We gave Claude Fable 5.1 an open task: solve Sir Thomas Urquhart’s Cyphral Distich. It appears to have actually solved it, and the solution is quite embarrassing for humans in hindsight. At the end of Urquhart’s Logopandecteision is a … Read more
Claude, our consumer product, is only available to people over 18 years. You’ll need to confirm you’re 18 or over while setting up an account. When we detect signals that you may be under 18, we’ll ask you to verify … Read more
We’re introducing Claude Fable 5.1 and Claude Mythos 5.1. They’re the world’s most advanced models for coding and knowledge work—and their research capabilities offer an early glimpse of how AI models will contribute to scientific progress. Claude Fable 5.1 and … Read more
Preflight Checklist Problem Statement Every commit message and PR description created by Claude Code automatically includes a session URL at the bottom (e.g. https://claude.ai/code/session_…). There is no opt-in prompt, no warning, and no mention of it during onboarding. Users only … Read more
A personal collection of Claude Code skills, published as a single plugin under the l3a0 namespace. This repo is both the plugin and its own marketplace. I write about how these tools get built — and about technology, business, and … Read more