Anthropic
Claude Opus 5.5
Release date not recorded. Accessibility not recorded. Cheapest standard rate we hold: $20 per million output tokens, no context split.
What it costs
per million tokens, US dollars. * marks a rate from a single registry or two that disagree — the best available number rather than a confirmed one. Every other row is confirmed against a seller or a licensed index.
What it scores, by house
This model is not in Epoch's catalogue under a name we can match exactly, so we hold no scores for it. The match is exact after normalisation and never fuzzy, because a loose one would eventually price one model as another.
What retires, and when
- deprecation — 2027-09-22 (Active)
Headlines that name it
- Simon Willison's LLM CLI adds a Claude Opus 5.5 option
- Anthropic says Claude Opus 5.5 makes fewer attempts to leave its test sandbox
Matched by the model's name appearing in our headline, literally. There is no link from a story to a model in our data, so this is a search result rather than a claim that the story is about it.
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