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Anthropic: Claude Sonnet 4.5 Context Window

Claude Sonnet 4.5 has a context window of 1M tokens. Its context score is 70.

Data sourced from OpenRouter API and manual data collection | Last updated: Nov 3, 2026, 8:01 AM UTC

Context
1M
Context score
70

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Frequently asked questions

How large is the Claude Sonnet 4.5 context window?

Claude Sonnet 4.5 has a context window of 1M tokens. Its context score is 70.