# Claude 3 Opus vs Claude Sonnet 4.5

As of Oct 15, 2026, Claude 3 Opus leads Claude Sonnet 4.5 in 1 of 2 shared categories: General LLM.

Claude 3 Opus: price per 1M tokens is unset in the catalog.

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

Claude 3 Opus: closed weights.

Claude Sonnet 4.5: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, Claude 3 Opus leads Claude Sonnet 4.5 in General LLM at #11 against #62.
- Which to pick, Science: As of Oct 15, 2026, Claude Sonnet 4.5 leads Claude 3 Opus in Science at #82 against #138.

As of Oct 15, 2026, Claude 3 Opus is ranked #11 in General LLM (since Oct 15, 2026; sources LMArena Text (style-controlled, overall); 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).