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Claude Opus 5
API

Claude Opus 5 has a 1M-token context window.

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Model specification

Claude Opus 5

Context window
1M tokens
Maximum output
128K tokens
Input
text · image · pdf
Reasoning
Yes
Tool calling
Yes
Model updated
2026-07-24

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Model facts sourced from models.dev. Last synced 2026-08-11. Tap availability may differ from upstream model availability.