Anthropic
Claude Opus 4.6 Fast
Claude Opus 4.6 Fast — speed-optimized variant of Anthropic's most capable reasoning model with 1M context.
claude-opus-4.6-fastPricing
~25%- Input
- $27 / 1,000,000 tokens
- Output
- $135 / 1,000,000 tokens
- Cache read
- $2.7 / 1,000,000 tokens
- Cache write
- $33.75 / 1,000,000 tokens
Discount history
Model details
- Input
- text, image
- Output
- text
- Context window
- 1,000,000 tokens
- Maximum output
- 128,000 tokens
- Availability
- Available
- Updated
- 11/8/2026, 3:58:06 AM UTC
Capacity is reserved when your request is accepted.
Capabilities
ChatStreamingTool callingVisionReasoning
Supported parameters
max_tokenstemperaturetop_ptop_kstoptoolstool_choiceresponse_formatinclude_reasoningreasoningstructured_outputs