Anthropic · Claude Opus line · flagship
Anthropic's Opus 4.6: a big jump on brand-new reasoning puzzles and the first Opus that can read 1M tokens of text at once — but everyday coding is unchanged.
Compared with Claude Opus 4.5 · the model it replaces
Solves far more puzzle-style problems it has never seen before
ARC-AGI-2 — reasoning through brand-new problems, not memorized ones
68.8%
▲ up from 37.6% · +31 points
First Opus that can read 1M tokens of text at once
Context window — how much text it can hold in one go
1M tokens
✦ new in Opus 4.6 — earlier Opus models held less
Everyday coding is unchanged from the last version
SWE-bench — fixing real bugs in real software projects
80.8%
no change from Opus 4.5 — was 80.9%
Claude Opus 5 is the current model in this line. The card shows how long it has been since the last release against the line's usual gap and its recent ones — the rhythm, not a date.
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