Claude Sonnet 4.5

Anthropic model details for pricing, context, and release tracking.

Pricing data updated:  Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output
Model Specs
ProviderAnthropic
Model IDanthropic/claude-sonnet-4.5
Prompt Price
per 1M tokens		$3
Completion Price
per 1M tokens		$15
Sample Workload Cost
1M input + 500K output		$10.5
Context Window1M
Release Date2025-09-29
Popularity RankUnranked
Daily DemandN/A

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Prices are normalized to USD per 1M tokens.
Claude Sonnet 4.5 Calculating… Estimated monthly API cost
Unit prices $3 input / $15 output Per 1M tokens

This estimate uses normalized public API pricing per 1M tokens. It is a planning aid, not a billing quote. Verify provider pricing, limits, and terms before production use.

Model Introduction

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...

Best Fit

Claude Sonnet 4.5 is best suited for long-context workloads.

Cost Example

A 1M input token plus 500K output token workload is estimated at $10.5.

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