# Claude Opus 4 vs O3 Mini

As of Oct 15, 2026, Claude Opus 4 leads O3 Mini in 2 of 5 shared categories: Reasoning and Long context.

Claude Opus 4: price per 1M tokens is unset in the catalog.

O3 Mini: $1.9250000000000003 per 1M blended tokens.

Claude Opus 4: closed weights.

O3 Mini: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, O3 Mini leads Claude Opus 4 in General LLM at #10 against #131.
- Which to pick, Reasoning: As of Oct 15, 2026, Claude Opus 4 leads O3 Mini in Reasoning at #125 against #172.
- Which to pick, Science: As of Oct 15, 2026, O3 Mini leads Claude Opus 4 in Science at #76 against #91.
- Which to pick, Long context: As of Oct 15, 2026, Claude Opus 4 leads O3 Mini in Long context at #86 against #186.
- Which to pick, Abstraction (ARC): As of Oct 15, 2026, O3 Mini leads Claude Opus 4 in Abstraction (ARC) at #51 against #69.

As of Oct 15, 2026, Claude Opus 4 is a former state-of-the-art holder in Reasoning (since Jun 3, 2025; 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).