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Anthropic: Claude Opus 4.8 (Fast)

anthropic/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

Input modalitiesT
Output modalitiesT
Source-linkedClosed weights
Report data
Context window1M
Maximum output128K
Provider offers0
Knowledge cutoffUndisclosed
Capabilities

What this model supports

ReasoningNo
Tool callingNo
Structured outputNo
AttachmentsNo
Temperature controlNo
Open weightsNo
Creator
Anthropic
Family
Not documented
Modalities
File, Image, Text
License
Not documented
Release date
Not documented
Model ID
anthropic/claude-opus-4.8-fast
Market availability

Provider pricing

Report price →
No known providers available.
Evidence

Published benchmark results

Insufficient benchmark coverage. ModelBench does not infer a score from price, context size, or model name.