Cheapest Claude Sonnet Models
As of October 21, 2026, among LiteLLM's active models with a 32K-token context window or more, offered by at least two providers or by their own lab, the cheapest of the Claude Sonnet models is Claude Sonnet 5, at $4.00 per 1M tokens (blended), from Anthropic.
Top 3
Sorted by blended price: 3 input tokens for every output token, at each model's headline price (its own lab's API where it sells it, otherwise its cheapest provider). Only Claude Sonnet models. Only active models with a 32K-token context window or more, offered by at least two providers or by their own lab. Free models are left out.
| # | Model | Lab | Blended price per 1M tokens | Price per 1M (in / out) | Context | Providers | Price from |
|---|---|---|---|---|---|---|---|
| 1 | Claude Sonnet 5 | Anthropic | $4.00 | $2.00 / $10.00 | 1M | 9 | Anthropic |
| 2 | Claude Sonnet 5.5 | Anthropic | $4.00 | $2.00 / $10.00 | 1M | 7 | Anthropic |
| 3 | Claude Sonnet 4.6 | Anthropic | $6.00 | $3.00 / $15.00 | 1M | 9 | Anthropic |