claude-sonnet-4-5 · Anthropic
Sonnet 4.5 is the best model in the world for agents, coding, and computer usage. It is also our most accurate and detailed model for long-running tasks, with enhanced knowledge in coding, finance, and cybersecurity. This model supports a thinking parameter to enable thinking requests in Claude mode.
Sonnet 4.5 is the best model in the world for agents, coding, and computer usage. It is also our most accurate and detailed model for long-running tasks, with enhanced knowledge in coding, finance, and cybersecurity. This model supports a thinking parameter to enable thinking requests in Claude mode.
Claude Sonnet 4.5 has a 1,000,000 token context window.
On AIHubMix, Claude Sonnet 4.5 costs $3.3 per million input tokens and $16.5 per million output tokens.
Claude Sonnet 4.5 accepts text and image input.
Claude Sonnet 4.5 supports thinking, tool calling, function calling and structured outputs. Per-protocol parameter support is listed in the capability table on this page.
Claude Sonnet 4.5 is available through the AIHubMix unified API. The API is OpenAI-compatible: point your OpenAI SDK at https://aihubmix.com/v1, use your AIHubMix API key, and set the model name to claude-sonnet-4-5 — no other code changes needed.
Claude Sonnet 4.5 is developed by Anthropic. AIHubMix aggregates it alongside models from other providers behind one API and one bill.
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Use Claude Sonnet 4.5 via the AIHubMix unified API — one interface for every major LLM.