Claude Sonnet 5.5
language modelAnthropic
Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, succeeding Claude Sonnet 5 as a direct upgrade. It is especially strong at building features, fixing bugs, and producing...
Key facts
| Made by | Anthropic |
|---|---|
| Type | language model |
| Released | September 28, 2026 |
| Reads at once | 1,000,000 tokens |
| Price (API, per million tokens) | $2 in · $10 out |
| Input → output | text, image, file → text |
Questions about Claude Sonnet 5.5
Who makes Claude Sonnet 5.5?
Claude Sonnet 5.5 is made by Anthropic.
When was Claude Sonnet 5.5 released?
We first saw Claude Sonnet 5.5 listed on September 28, 2026.
How much does Claude Sonnet 5.5 cost?
Through OpenRouter it costs $2 per million input tokens and $10 per million output tokens. Prices change, so check the provider before you build on it.
How much text can Claude Sonnet 5.5 read at once?
Up to 1,000,000 tokens, roughly 750K words.
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Modelcast collects this page automatically from public sources (OpenRouter). Facts are copied from those sources, not written by the maker. Not affiliated with Anthropic.