According to UsagePricing's tracker, Claude Sonnet 4.5 costs $3.00 per 1M input tokens and $15.00 per 1M output tokens as of October 2025. The model supports a 200,000-token context window.
Balanced enterprise model — strong reasoning, coding, and creativity.
Token Costs (per 1M)
Technical Specs
Price History
| Date | Input Price | Output Price |
|---|---|---|
| 10/22/2025 | $3.00 | $15.00 |
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How much does Claude Sonnet 4.5 cost per 1M tokens? ▼
Claude Sonnet 4.5 costs $3 per 1M input tokens and $15 per 1M output tokens as of March 2026.
What is Claude Sonnet 4.5's context window? ▼
Claude Sonnet 4.5 has a context window of 200,000 tokens, meaning it can process approximately 150,000 words in a single request.
Who makes Claude Sonnet 4.5? ▼
Claude Sonnet 4.5 is made by Anthropic. You can access it via the Anthropic API.