# Anthropic: Claude Sonnet 5.5

Provider: anthropic  
Category: llm  
Model ID: `anthropic/claude-sonnet-5.5`

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...

## Specs

- Context length: 1000000 tokens
- Max output: 128000 tokens
- Modalities: text, image, file
- Released: 2026-09-28

## Pricing

- Input: $2.00 per million tokens
- Output: $10.00 per million tokens

## Providers

- **anthropic** — ctx 1000000, input $2.00/M, output $10.00/M

## Verdict

Claude Sonnet 5.5 sits between Sonnet 4 and Opus 5 in Anthropic's lineup, offering a middle ground on cost and capability. It handles multi-turn conversations and complex reasoning well, with a massive 1M token context window that makes it viable for long-document work. The $2/$10 pricing undercuts Opus 5 significantly while maintaining strong instruction-following. Reach for this when you need better reasoning than Sonnet 4 but can't justify Opus 5's premium, especially for tasks that benefit from extended context.

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Last verified: 2026-10-19T02:30:34.239Z  
Canonical URL: https://switchy.build/directory/models/claude-sonnet-5-5