Claude Opus 4.6 (Fast) chat
Fast-mode variant of Opus 4.6 - identical capabilities with higher output speed at premium 6x pricing.
Learn more in Anthropic's docs: https://platform.claude.com/docs/en/build-with-claude/fast-mode
Capabilities
Context Window 1M tokens
Max Output 128k tokens
Inputs
Outputs
Pricing (per 1M tokens)
Input $30.00
Output $150.00
Cache Read $3.00
Cache Write $37.50
Supported Parameters
include_reasoningmax_tokensreasoningresponse_formatstopstructured_outputstemperaturetool_choicetoolstop_pverbosity