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by Anthropic

Claude Opus 5 (Fast).

multimodal closed 1M ctx
Cheapest input
$10.0/M
on OpenRouter
Cheapest output
$50.0/M
on OpenRouter
Hosted equiv.
~$18.0/hr
@ 100 tok/s on OpenRouter

Fast-mode variant of [Opus 5](/anthropic/claude-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/bui

Hosted API only

No self-host path — closed weights.

Claude Opus 5 (Fast)'s weights aren't published. Use it via the access providers below.

Where to use it

Cheapest hosted endpoints.

Provider Access $/M in $/M out
OpenRouter api aggregator $10.0 $50.0 Launch ↗
FAQ

Frequently asked.

How do I run Claude Opus 5 (Fast)?
Claude Opus 5 (Fast) is a closed-source API model. The cheapest way to access it is through the API providers listed on this page (direct API, aggregators, and hosted chat UIs).
Where can I access Claude Opus 5 (Fast)?
Claude Opus 5 (Fast) is available via OpenRouter. Each access option lists its own pricing (per million tokens or hourly hosting).
How much does it cost to run Claude Opus 5 (Fast)?
API pricing starts at $10.0/M input tokens and $50.0/M output tokens. Self-hosting cost depends on the GPU you rent — see the Run It Yourself tab.
Is Claude Opus 5 (Fast) open-source or proprietary?
Claude Opus 5 (Fast) is a proprietary model from Anthropic. Access is API-only — there are no public weights to download.