Claude Sonnet 4.5 pricing and routing profile
Claude Sonnet 4.5 from Anthropic lists at $3.00 per million input tokens and $15.00 per million output tokens, with a 1,000,000-token context window. Prices from OpenRouter's catalogue on 2026-09-28.
Tool callingStructured outputReasoning control
Cost per 1,000 requests
| Request shape | List cost |
|---|---|
| Classification or routing (600 tokens in, 10 out) | $1.95 |
| Chat reply (2,000 in, 400 out) | $12.00 |
| Retrieval-augmented answer (8,000 in, 500 out) | $31.50 |
Before prompt caching. Try your own shape in the cost calculator.
Can Gimbix route to it first?
Not as a first-answer model through OpenRouter: no host returns token log probabilities for Claude Sonnet 4.5. It can still be the model Gimbix falls back to when a cheaper model is unsure.
Cheaper models that can answer first
Models priced below Claude Sonnet 4.5 that expose a confidence signal. Whether they answer your traffic as well is what a Gimbix pilot measures.
| Model | Input / output per 1M | Cheaper on a chat reply |
|---|---|---|
| GLM 5.3 Prime | $2.80 / $8.80 | 24% |
| GPT Audio | $2.50 / $10.00 | 25% |
| GPT-4o (2024-11-20) | $2.50 / $10.00 | 25% |
| GPT-4o (2024-08-06) | $2.50 / $10.00 | 25% |
| GPT-4o | $2.50 / $10.00 | 25% |
| Qwen3.8 Max (0902) | $2.00 / $6.00 | 47% |
Questions
How much does Claude Sonnet 4.5 cost?
Claude Sonnet 4.5 lists at $3.00 per million input tokens and $15.00 per million output tokens on OpenRouter as of 2026-09-28. A typical chat reply of 2,000 input and 400 output tokens costs about $12.00 per 1,000 requests.
What is the context window of Claude Sonnet 4.5?
1,000,000 tokens.
Can a cheaper model replace Claude Sonnet 4.5?
Sometimes. Gimbix proves it on your own traffic before routing: the cheaper model must match Claude Sonnet 4.5 on one half of your requests and make at most three answers worse on the other.