Claude Sonnet 4.5
Last verified October 25, 2026 · Anthropic pricing ↗$3.00/1M input · $15.00/1M output · 200K context · Anthropic
mid-rangegeneralchatcost-conscious
When to use Claude Sonnet 4.5
Previous generation Sonnet. Still excellent value for general tasks. Consider upgrading to 4.6 for improved code generation and reasoning.
- Lower cost than Sonnet 4.6
- 200K context window
- Reliable for production workloads
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Alternatives to Claude Sonnet 4.5
Pricing Details
AnthropicDEPRECATED September 30, 2026; claude-sonnet-4-5-20250929 retires on the Claude API on November 30, 2026, after which requests fail. Recommended replacement claude-sonnet-5-5 at $2/$10. Bedrock and Google-managed Vertex set their own dates.
Input / 1M tokens
$3
Output / 1M tokens
$15
Context Window
200K
Max Output
64K
Price History
No price change recorded since 2026-07-24, when this site started tracking this model.
Frequently Asked Questions
Common questions about Claude Sonnet 4.5 pricing and usage