# Claude Opus 4.6 vs O3 Mini

As of Oct 15, 2026, Claude Opus 4.6 leads O3 Mini in 4 of 4 shared categories: General LLM, Reasoning, Science, and Long context.

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

O3 Mini: $1.9250000000000003 per 1M blended tokens.

Claude Opus 4.6: closed weights.

O3 Mini: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, Claude Opus 4.6 leads O3 Mini in General LLM at #4 against #10.
- Which to pick, Reasoning: As of Oct 15, 2026, Claude Opus 4.6 leads O3 Mini in Reasoning at #2 against #172.
- Which to pick, Science: As of Oct 15, 2026, Claude Opus 4.6 leads O3 Mini in Science at #32 against #76.
- Which to pick, Long context: As of Oct 15, 2026, Claude Opus 4.6 leads O3 Mini in Long context at #2 against #186.

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, O3 Mini is a former state-of-the-art holder in Reasoning (since Feb 9, 2025; sources LMArena Text (style-controlled, hard prompts); methodology v1.0).