Claude Opus 4.5
Flagship Claude model for deep reasoning, coding, and long-horizon agents
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Open / InstallLast updated October 28, 2026
Description
Flagship Claude model for deep reasoning, coding, and long-horizon agents. Supports a context window of 200,000 tokens. Supports extended reasoning. Supports tool calling. Input priced at $5 per million tokens. Weights are not publicly released; access is via the provider API.
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Author
Anthropic
Platform
api
Pricing model
paid
Categories
- Coding
- Research
- Design
- Productivity
Tags
- llm
- closed-weights
- anthropic
- claude-opus
- reasoning
- tool-calling
- text
- image
- pdf
Capabilities
- Text generation
- 200,000 token context
- Extended reasoning
- Tool calling
- File attachments
- Image input
Information
TypeLarge Language Model
Model TypeText Generation
SourceModels Dev
AddedOctober 28, 2026