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Anthropic: Claude Opus 4.8 (Fast)
anthropic/claude-opus-4.8-fast
VisionTool useJSONReasoningStreaming
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
Pricing
Input
$10.00 / 1M
Output
$50.00 / 1M
Specs
Context
1,000,000 tokens
Input
text, image, file
Output
text
Released: 2026-05
Supported parameters
include_reasoningmax_tokensreasoningresponse_formatstopstructured_outputstool_choicetoolsverbosity