# Anthropic: Claude Opus 5.5

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

Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5. It is particularly strong at multi-step changes in large codebases, code...

## Specs

- Context length: 1000000 tokens
- Max output: 128000 tokens
- Modalities: text, image, file
- Released: 2026-09-22

## Pricing

- Input: $4.00 per million tokens
- Output: $20.00 per million tokens

## Providers

- **anthropic** — ctx 1000000, input $4.00/M, output $20.00/M

## Verdict

Claude Opus 5.5 sits at the top of Anthropic's lineup with a million-token context window and multimodal input handling. It's built for complex reasoning tasks where you need to process entire codebases, long documents, or multiple images in a single pass. The trade-off is cost: at $20/Mtok output, this is expensive for high-volume use cases. Reach for Opus 5.5 when accuracy and context depth matter more than speed or budget.

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