Claude Sonnet 5.5 API pricing
Anthropic model · Anthropic on AIWiseRank
Short answer
Claude Sonnet 5.5 by Anthropic costs $2 per 1M input tokens and $10 per 1M output tokens, with a 1M token context window. It scores 83.9% on ARC-AGI-2. Gemini 3.8 Flash scores about as well on ARC-AGI-2 (89.2%) for $1.50 per 1M blended tokens versus $4.
Prices updated Oct 23, 2026 (APIpulse, CC BY 4.0) · Benchmarks: ARC Prize, Vals.ai · all models
API cost calculator
Enter your monthly usage in millions of tokens (1M tokens ≈ 750,000 words).
Standard rates; batch processing and prompt caching can lower the bill.
Benchmarks
Cheaper models with similar scores
Within 3 points on the same benchmark, at a lower blended price.
- Gemini 3.8 FlashARC-AGI-2 89.2% · $1.50 / 1M
Other Anthropic models
| Model | Input / 1M | Output / 1M |
|---|---|---|
| Claude Opus 5.5 | $4 | $20 |
| Claude Haiku 5.5 | $0.10 | $0.50 |
| Claude Fable 5.1 | $10 | $50 |
| Claude Fable 5 | $10 | $50 |
| Claude Mythos 5 | $10 | $50 |
| Claude Opus 5 | $5 | $25 |
| Claude Sonnet 5 | $2 | $10 |
| Claude Opus 4.8 | $5 | $25 |
Frequently asked questions
How much does the Claude Sonnet 5.5 API cost?
Claude Sonnet 5.5 costs $2 per 1M input tokens and $10 per 1M output tokens. A workload of 10M input and 2M output tokens a month costs $40.
What is the context window of Claude Sonnet 5.5?
Claude Sonnet 5.5 supports a 1M token context window.
Is there a cheaper alternative to Claude Sonnet 5.5?
Gemini 3.8 Flash scores 89.2% on ARC-AGI-2, close to Claude Sonnet 5.5, at $1.50 per 1M blended tokens versus $4.