# Claude Opus 4.6 vs Claude Sonnet 4.5

As of Oct 15, 2026, Claude Opus 4.6 leads Claude Sonnet 4.5 in 7 of 7 shared categories: General LLM, Reasoning, Math, Science, Coding › Web dev, Long context, and Factuality.

Claude Opus 4.6: $10 per 1M blended tokens.

Claude Sonnet 4.5: $6 per 1M blended tokens.

Claude Opus 4.6: closed weights.

Claude Sonnet 4.5: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, Claude Opus 4.6 leads Claude Sonnet 4.5 in General LLM at #4 against #62.
- Which to pick, Reasoning: As of Oct 15, 2026, Claude Opus 4.6 leads Claude Sonnet 4.5 in Reasoning at #2 against #51.
- Which to pick, Math: As of Oct 15, 2026, Claude Opus 4.6 leads Claude Sonnet 4.5 in Math at #11 against #25.
- Which to pick, Science: As of Oct 15, 2026, Claude Opus 4.6 leads Claude Sonnet 4.5 in Science at #32 against #82.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, Claude Opus 4.6 leads Claude Sonnet 4.5 in Coding › Web dev at #37 against #86.
- Which to pick, Long context: As of Oct 15, 2026, Claude Opus 4.6 leads Claude Sonnet 4.5 in Long context at #2 against #34.
- Which to pick, Factuality: As of Oct 15, 2026, Claude Opus 4.6 leads Claude Sonnet 4.5 in Factuality at #3 against #61.

As of Oct 15, 2026, Claude Opus 4.6 is near state of the art, rank #2 in Reasoning (since Oct 15, 2026; sources LMArena Text (style-controlled, hard prompts); methodology v1.0).

As of Oct 15, 2026, Claude Sonnet 4.5 is a former state-of-the-art holder in General LLM (since Oct 3, 2025; sources LMArena Text (style-controlled, overall); methodology v1.0).