{"id":"anthropic/claude-opus-5-fast","name":"Claude Opus 5 (Fast)","owned_by":"anthropic","description":"Fast-mode variant of [Opus 5](/anthropic/claude-opus-5) - identical capabilities with higher output speed at 2x pricing relative to regular Opus 5.\n\nLearn more in Anthropic's docs: https://platform.claude.com/docs/en/build-with-claude/fast-mode","context_window":1000000,"max_tokens":128000,"type":"language","tags":["reasoning","tool-use","vision"],"released":1784912546,"modalities":{"input":["text","image","file"],"output":["text"]},"supported_parameters":["include_reasoning","max_tokens","reasoning","reasoning_effort","response_format","stop","structured_outputs","tool_choice","tools","verbosity"],"pricing":{"input":"0.00001","output":"0.00005","input_cache_read":"0.000001","input_cache_write":"0.0000125"},"legal":[]}