Fast-mode variant of [Opus 5](/anthropic/claude-opus-5) - identical capabilities with higher output speed at 2x pricing relative to regular Opus 5. Learn more in Anthropic's docs: https://platform.claude.com/docs/en/build-with-claude/fast-mode
Specifications
- Provider
- Anthropic
- Type
- Vendor / proprietary
- Modality
- text+image+file->text
- Context window
- 1M
- Released
- July 24, 2026
Capabilities
Input: textInput: imageInput: fileOutput: textConfigurable reasoning effort
Strengths
include_reasoningmax_tokensreasoningreasoning_effortresponse_formatstopstructured_outputstool_choicetoolsverbosity
