2021 → 13 Oct 2026
Claude, from a research bet to whatever is writing this page
Every model, product and research milestone on one line. Press play, or drag the scrubber to any month.
Oct 2026
Claude Opus 5.5model
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1M tokens
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Log scale. About 750,000 words of working memory.
Haiku
Sonnet
Opus
Fable
Product
Research & safety