Claude Sonnet 4.5
Anthropic
- Context window
- 200K 200,000 tokens
- Max output
- 64K 64,000 tokens
- Input / Output
- text, image → text
API pricing
USD / 1M tokens
| Input | Output | Cached input |
|---|---|---|
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Input / output price · USD / 1M tokens
Timeline
Related signals: Claude Sonnet 5.5
- · Evidence links · Anthropic · official articles
Signals 1
Specifications
Claude Sonnet 4.5 is a model from Anthropic, released on 29 Sep 2025. The context window is 200,000 tokens. The maximum output is 64,000 tokens. Pricing is $3.00 per million input tokens and $15.00 per million output tokens.
- Context window
- 200,000
- Max output
- 64,000
- Input
- text · image
- Output
- text
- Input · USD / 1M tokens
- $3.00
- Output · USD / 1M tokens
- $15.00
- Cached input · USD / 1M tokens
- $0.30
Questions
What is the context window of Claude Sonnet 4.5?
The context window is 200,000 tokens. The maximum output is 64,000 tokens.
How much does Claude Sonnet 4.5 cost?
Pricing is $3.00 per million input tokens and $15.00 per million output tokens. Cached input is $0.30 per million.
When was Claude Sonnet 4.5 released?
On 29 Sep 2025.