# Claude Opus 5 vs Gemma 4 31B

As of Oct 15, 2026, Claude Opus 5 leads Gemma 4 31B in 5 of 5 shared categories: General LLM, Reasoning, Coding › Web dev, Long context, and Factuality.

Claude Opus 5: $10 per 1M blended tokens.

Gemma 4 31B: price per 1M tokens is unset in the catalog.

Claude Opus 5: closed weights.

Gemma 4 31B: open weights.

- Which to pick, General LLM: As of Oct 15, 2026, Claude Opus 5 leads Gemma 4 31B in General LLM at #11 against #54.
- Which to pick, Reasoning: As of Oct 15, 2026, Claude Opus 5 leads Gemma 4 31B in Reasoning at #9 against #50.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, Claude Opus 5 leads Gemma 4 31B in Coding › Web dev at #6 against #80.
- Which to pick, Long context: As of Oct 15, 2026, Claude Opus 5 leads Gemma 4 31B in Long context at #9 against #45.
- Which to pick, Factuality: As of Oct 15, 2026, Claude Opus 5 leads Gemma 4 31B in Factuality at #4 against #49.

As of Oct 15, 2026, Claude Opus 5 is near state of the art, rank #4 in Factuality (since Oct 15, 2026; sources LMArena Text factuality; methodology v1.0).

As of Oct 15, 2026, Gemma 4 31B is tied for state of the art in General LLM (since Oct 8, 2026; sources LMArena Text (style-controlled, overall); methodology v1.0).