claude

Anthropic's new Messages API beta stops agents re-uploading the whole conversation. It cuts time to first token on huge contexts, but billed tokens and rate limits do not change.

Anthropic, OpenAI and Google shipped new flagships between September 1 and October 13, and once independent evaluators reran the headline benchmarks the frontier compressed into a statistical tie, leaving cost, tokens, speed and access as the differences buyers can measure.

Anthropic released Claude Opus 5.5 at $4 and $20 per million tokens and OpenAI released GPT-6 Sol at $2 and $10 about 90 minutes apart on September 22, and because each launch table benchmarks the other lab's previous model, the price sheets are the only like-for-like comparison.

Anthropic shipped Claude Fable 5.1 to everyone and the same weights as Mythos 5.1 to vetted US organizations, cutting cache reads 75% to $0.25, but the first independent run found a max-effort task costs 20% more than on Fable 5.

Nicolas Cole locked himself in his office for 7 hours to pick 7 X articles about AI and Claude, and the resulting reading list now has 255,006 views and 3,508 bookmarks; the pattern underneath is the story.