Claude Sonnet 4.5: pricing, specs, and how to use it (2026)
Claude Sonnet 4.5 is an AI model from Anthropic, available alongside ChatGPT, Claude, Gemini, and 300+ other models inside Admix on one subscription from $8.99/mo.
Quick specs
| Provider | Anthropic |
| Model ID | anthropic/claude-sonnet-4.5 |
| Input price | $3.00 / 1M tokens |
| Output price | $15.00 / 1M tokens |
| Tier | pro |
| Accepts images | Yes |
| Category | Advanced |
How to use Claude Sonnet 4.5 in Admix
Open Admix, pick Claude Sonnet 4.5 from the model list, and start chatting. You can also run the same prompt through Claude Sonnet 4.5 and other frontier models like Claude, GPT-5, and Gemini side by side, then pick the best answer or spot disagreement. One subscription, no separate API key.
Compare Claude Sonnet 4.5 with other AI models
These are popular comparisons to make alongside Claude Sonnet 4.5:
FAQ
What is Claude Sonnet 4.5?
Claude Sonnet 4.5 is an AI model from Anthropic, available inside Admix alongside 300+ other frontier and open-source AI models on one subscription.
How much does Claude Sonnet 4.5 cost?
Claude Sonnet 4.5 costs $3.00 per million input tokens and $15.00 per million output tokens. In Admix you use it inside one subscription starting at $8.99 per month, no separate API key required.
Can I compare Claude Sonnet 4.5 with ChatGPT, Claude, or Gemini?
Yes. Admix lets you run the same prompt through Claude Sonnet 4.5 and any of the other 300+ models in the catalog, then see the answers side by side.
Try Claude Sonnet 4.5 in Admix
One subscription, 300+ AI models including Claude Sonnet 4.5. Compare any of them side by side from $8.99/mo.
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