Anthropic: Claude Sonnet 4.5
anthropic/claude-sonnet-4.5
Price Published
- Input
- $3.00 per million tokens
- Output
- $15.00 per million tokens
Optional features and fallback routes can cost extra. Confirm current terms with the provider.
Specifications Published
- Context window
- 1,000,000 tokens
- Max output
- 64,000 tokens
- Tool calling
- Supported
- Vision input
- Supported
- Reasoning
- Supported
- Knowledge cutoff
- Jan 31, 2025
- Listed since
- Sep 29, 2025
Measured by the Club Signed cheapoS reports
Not yet observed No signed request reports for this exact route yet. Missing reports aren't a failure or a zero.
How we measure · Reports come from cheapoS members who share model details.
Benchmarks Artificial Analysis via OpenRouter
- Intelligence index
- 20.7
- Coding index
- 52.1
- Agentic index
- 15.8
Scores from Artificial Analysis, as distributed in the OpenRouter catalog. They measure test suites, not request reliability on real work.
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anthropic/claude-sonnet-4.5as a worker or reviewer, and start with a small task you can check.
About this model OpenRouter description
Claude Sonnet 4.5 is Anthropic’s most advanced Sonnet model to date, optimized for real-world agents and coding workflows. It delivers state-of-the-art performance on coding benchmarks such as SWE-bench Verified, with...
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Catalog data from the OpenRouter model catalog, retrieved Sep 29, 2026, 12:37 PM UTC. A listing isn't a live availability check.