Claude Sonnet 5

Claude Sonnet 5 is a text chat model developed by Anthropic and offered through inference APIs. It belongs to the Claude family and carries the Sonnet name, which Anthropic has historically used for its mid-line models — positioned between the smaller Haiku tier and the larger Opus tier in terms of intended balance between capability and serving cost. Our catalog entry tracks it as a general-purpose chat/completion model. On the performance side, third-party measurements from Artificial Analysis put Claude Sonnet 5 at approximately 65.2 output tokens per second with a time to first token of around 800 ms. Those two numbers describe the interactive feel of the model more than its intelligence: sub-second first-token latency is generally workable for streaming chat interfaces, while a throughput in the mid-60s tokens/second means long generations still take noticeable wall-clock time. Serving speed varies by provider, region, prompt length, and load, so treat these figures as a reference point rather than a guarantee. We do not currently track a confirmed context window, modality list, or benchmark suite scores for Claude Sonnet 5 in our database, so this page deliberately avoids stating them. For those details, consult Anthropic's model documentation or the individual provider's model card. What this page is useful for is comparing what different providers charge to serve the model — see the pricing table above — and comparing its measured latency and throughput against other models in the catalog.