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anthropicAnthropic: Claude Opus 4.8 (Fast)
Fast-mode variant of [Opus 4.8](/anthropic/claude-opus-4.8) - identical capabilities with higher output speed at 2x pricing relative to regular Opus 4.8. Learn more in Anthropic's docs: https://platform.claude.com/docs/en/build-with-claude/fast-mode
anthropic/claude-opus-4.8-fast
Context Size
1,000K
Input Price
1,500,000 pts/M
Output Price
7,500,000 pts/M
Architecture
Text
Image
File
Supported Parameters
include_reasoningmax_tokensreasoningresponse_formatstopstructured_outputstool_choicetoolsverbosity
Details
TokenizerClaude
Max Completion128,000 tokens
Provider Context1,000K tokens
ModeratedYes
CreatedMay 27, 2026