All modelsCalculate what your real prompts cost on Claude Sonnet 4.5
Claude Sonnet 4.5
Anthropic model, released 29 Sept 2025.
$3.00
per 1M input tokens
$15.00
per 1M output tokens
$0.3
per 1M cached-read tokens
Price history
Price stable since we started tracking (7 Jul 2026). History will chart here as soon as it moves.
Specifications
- Lab
- Anthropic
- Released
- 29 Sept 2025
- Context window
- 1M tokens
- Max output
- 64k tokens
- Input modalities
- text, image, file
- Output modalities
- text
- Knowledge cutoff
- 2025-01-31
- Open source
- No
Benchmarks
| Benchmark | Category | Score | As of |
|---|---|---|---|
| LMArena (Chatbot Arena) | coding | 1485.2 (1480.1–1490.3) | 12 Aug 2026 |
| LMArena (Chatbot Arena) | overall | 1437.8 (1434.9–1440.7) | 12 Aug 2026 |
LMArena (Chatbot Arena) data © their authors, CC-BY-4.0
Frequently asked questions
How much does Claude Sonnet 4.5 cost?
Claude Sonnet 4.5 costs $3.00 per 1M input tokens and $15.00 per 1M output tokens (list price, updated every 6 hours).
What is Claude Sonnet 4.5's context window?
Claude Sonnet 4.5 supports a 1M-token context window with up to 64k output tokens.