Anthropic · Claude Opus line · flagship
Claude Opus 4.8 was released by Anthropic on May 28, 2026, as a flagship model in the Claude Opus line.
Scores 74.6% on Terminal-Bench 2.1, up from 66.1% for Opus 4.7, at the same $5 / $25 price per 1M tokens, and its fast mode now costs a third of what fast mode cost for earlier models.
Compared with Claude Opus 4.7 · the model it replaces
Finishes more multi-step tasks at the command line
Terminal-Bench 2.1 — running real commands to complete a task
74.6%
▲ up from 66.1% · +8.5 points
Solves 7 in 10 hard real-world coding tasks
SWE-bench Pro — fixing real bugs in real software projects
69.2%
▲ up from 64.3% · +4.9 points
Costs the same to run as before
Price per 1M tokens — what developers pay, input / output
$5 / $25
same price as Opus 4.7
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Claude Opus 5.5 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.
Latest: Claude Opus 5.5 · Sep 22, 2026
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