Claude Sonnet 4.5 (batch)
The Sonnet that established the Claude 4 line as the default mid-tier choice. Still widely deployed where 4.6 hasn't been re-validated.
Claude Sonnet 4.5 (batch) is a multimodal AI model from Anthropic. It costs $1.500 per million input tokens and $7.500 per million output tokens (blended $3.300/M), with a 1,000,000-token context window.
Profile inherited from upstream Claude Sonnet 4.5 ↗ — this is a hosted variant of the same open-weights model.
- Strong coding for the price
- 1M context
- Solid vision
- Wide ecosystem support
- Mid-cost production chat
- Existing Sonnet 4.5 pipelines
- Document Q&A
Benchmarks
More from Anthropic
See all 18 →Frequently asked questions
How much does Claude Sonnet 4.5 (batch) cost?
Claude Sonnet 4.5 (batch) costs $1.500 per million input tokens and $7.500 per million output tokens, for a blended reference rate of $3.300 per million tokens.
What is Claude Sonnet 4.5 (batch)'s context window?
Claude Sonnet 4.5 (batch) supports up to 1,000,000 tokens of context in a single request.
What is Claude Sonnet 4.5 (batch) best for?
Claude Sonnet 4.5 (batch) is well suited to Strong coding for the price, 1M context and Solid vision.
Who makes Claude Sonnet 4.5 (batch)?
Claude Sonnet 4.5 (batch) is developed and served by Anthropic. It was released in Sep 2025.