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Claude Opus 4.6

The last Opus generation on the classic tokenizer.

API model IDclaude-opus-4-6
Context window1M tokens
Max output128K tokens
Input price$5 per million tokens
Output price$25 per million tokens
Knowledge cutoffMay 2025
ReleasedFeb 5, 2026
Tokenizer generationClassic (Sonnet 4.6 and earlier)
StatusActive

From the announcement

  • Brought 1M context in beta.
  • Agent teams landed in Claude Code.
  • Topped Terminal-Bench 2.0.
Read Anthropic's announcement
Count tokens for Claude Opus 4.6Estimate your monthly costCheck what fits in its context window

Other models

Claude Opus 4.8Claude Fable 5Claude Sonnet 5Claude Opus 4.7Claude Sonnet 4.6Claude Sonnet 4.5Claude Haiku 4.5Claude Opus 4.5Claude Opus 4.1

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