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by Anthropic

Anthropic: Claude Opus 4.5.

multimodal closed 200K ctx
Cheapest input
$5.0/M
on Anthropic API
Cheapest output
$25.0/M
on Anthropic API
Hosted equiv.
~$9.0/hr
@ 100 tok/s on Anthropic API

Claude Opus 4.5 is Anthropic’s frontier reasoning model optimized for complex software engineering, agentic workflows, and long-horizon computer use. It offers strong multimodal capabilities, competitive performance acro

Hosted API only

No self-host path — closed weights.

Anthropic: Claude Opus 4.5'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
Anthropic API api direct $5.0 $25.0 Launch ↗
OpenRouter api aggregator $5.0 $25.0 Launch ↗
FAQ

Frequently asked.

How do I run Anthropic: Claude Opus 4.5?
Anthropic: Claude Opus 4.5 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 Anthropic: Claude Opus 4.5?
Anthropic: Claude Opus 4.5 is available via Anthropic API, OpenRouter. Each access option lists its own pricing (per million tokens or hourly hosting).
How much does it cost to run Anthropic: Claude Opus 4.5?
API pricing starts at $5.0/M input tokens and $25.0/M output tokens. Self-hosting cost depends on the GPU you rent — see the Run It Yourself tab.
Is Anthropic: Claude Opus 4.5 open-source or proprietary?
Anthropic: Claude Opus 4.5 is a proprietary model from Anthropic. Access is API-only — there are no public weights to download.