POSTanthropic
/v1/messagesClaude Opus 5 Fast
claude-opus-5-fastFast-mode variant of Opus 5 - identical capabilities with higher output speed at 2x pricing relative to regular Opus 5. Learn more in Anthropic's docs: https://platform.claude.com/docs/en/build-with-claude/fast-mode
Total Context
1Mtokens
Max Output
128Ktokens
Released
Jul 24, 2026
Modalities
Claude Opus 5 Fast Price
| Input Price | Output Price | Cache Read |
|---|---|---|
| $10/M | $50/M | $1/M |
How do I use Claude Opus 5 Fast through the API?
POSTopenai
/v1/chat/completionsClaude Opus 5 Fast Benchmark
60.7
/100
Artificial Analysis Intelligence Index
Artificial Analysis broad capability aggregate
Index score
78
/100
Artificial Analysis Coding Index
Artificial Analysis software task aggregate
Index score
Knowledge & Reasoning
GPQA
Advanced science problem solving
93.2%
HLE
Broad expert-level exam set
52.6%
Coding & Engineering
SciCode
Scientific coding challenges
55.7%
Instruction Following & Agent Tasks
AA-LCR
Long-context reasoning
70%
Metrics sourced from Artificial Analysis
claude-opus-5-fast FAQs
Useful questions about using claude-opus-5-fast on TokenHub.
What is claude-opus-5-fast?+
claude-opus-5-fast is TokenHub’s fast-mode entry for Claude Opus 5. Anthropic describes fast mode as the same model and capabilities with a faster inference configuration, not a separate intelligence model.
What is claude-opus-5-fast best used for?+
It is useful for interactive coding agents, live analysis, streaming responses, and other Opus-quality workflows where faster output generation improves the user experience.
How much faster is the fast mode?+
Anthropic states that fast mode can provide up to 2.5 times more output tokens per second. The gain focuses on output generation speed, not necessarily time to the first token.
What limitations or tradeoffs does fast mode have?+
Fast mode is a research preview with premium pricing and dedicated capacity limits. Availability can be restricted, and it does not make every request start sooner; important outputs still require review.
How do I use claude-opus-5-fast through TokenHub?+
If the alias is available to your account, select claude-opus-5-fast in the TokenHub API request and use your TokenHub endpoint and credentials. Confirm current parameters, quotas, and routing on the live model page.
How is fast mode priced and when should I choose it?+
Anthropic lists fast mode at $10 per million input tokens and $50 per million output tokens. Choose it when output latency materially affects the experience; choose standard Opus 5 when lower cost matters more. TokenHub pricing may differ.
Claude-opus-5-fast Media and Demos
Verified public posts, discussions, and videos about Claude Opus 5 and its fast mode.
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Reddit
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