ModelRefs / Claude Sonnet 4.5 by Anthropic — Benchmarks, Pricing & Revi…

Claude Sonnet 4.5 by Anthropic — Benchmarks, Pricing & Revi…

Claude Sonnet 4.5 (Anthropic): Claude Sonnet 4.5 is Anthropic's balanced frontier model, designed for complex reasoning, coding, and agentic tasks while main…

What this reference supports

Claude Sonnet 4.5 is an Anthropic hosted model positioned for coding, long-horizon agentic work, and computer use, with extended-thinking support in the Claude 4 generation. Implementation decisions weigh its cost-latency profile against Opus-tier models and require verifying current context-window and feature availability per endpoint.

Claude Sonnet 4.5 is attributed to Anthropic in ModelRefs' canonical registry. Tracked modalities: Text input and output, Image input. Primary use cases considered on ModelRefs: Repository-scale coding assistants and long-running agent loops; Tool-heavy enterprise workflows including computer-use automation.

This ModelRefs profile is Provisional and pending review — decision-support material, not a final or universal ranking. Confirm current behavior, access, pricing, limits, licensing, and lifecycle in Anthropic's own documentation, and evaluate Claude Sonnet 4.5 on representative workloads before implementation.

Benchmark & Evaluation

ModelRefs does not yet hold qualifying sourced benchmark evidence for Claude Sonnet 4.5, so its benchmark coverage is incomplete. Treat any benchmark discussion as provisional and confirm results on representative workloads before selecting it.

  • No benchmark score is imported into this editorial record. Provider-reported evaluations support scoped notes only; canonical score records are governed separately with their own provenance.
  • Anthropic's release notes report coding and agentic evaluations under provider-defined harnesses; no score is imported by this record.

Implementation considerations

  • Decide extended-thinking budgets explicitly; thinking tokens change cost and latency and should be tuned per task.
  • Verify context-window, memory, and computer-use feature availability for your API tier and region rather than assuming parity across surfaces.
  • Hosted through the Anthropic API and eligible cloud partners (per Anthropic's current documentation).
  • Feature flags, rate limits, and data-retention controls differ by platform and account; check the models overview for the current matrix.

Risks and limitations

  • Hosted-model behavior, quotas, pricing, and data controls can change without a client-side version pin unless a dated snapshot is used.
  • Provider-reported capabilities require task-specific evaluation before production reliance.

Source coverage

This reference is Provisional. Model behavior, access, pricing, limits, and lifecycle can change; verify the linked provider documentation and run task-specific evaluations before implementation.

Known coverage gaps:

  • Independent reproduction of agentic and computer-use evaluations is not attached.
  • Endpoint-by-endpoint feature and context coverage needs periodic review.

Sources

Continue your research

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