Best · Best AI model for reasoning — October 2026

Best AI model for reasoning — October 2026

As of Oct 14, 2026, Gemini 4 Argon & Claude Opus 5.5 are tied for state of the art in Reasoning (since Oct 2, 2026; sources LMArena Text (style-controlled, hard prompts); methodology v1.0).

Leading, crown pending confirmation: Muse Wonder.

Category board for Reasoning

Top 10

Ranks

  1. #1 Gemini 4 Argon
  2. #1 Claude Opus 5.5
  3. #2 Claude Opus 4.6
  4. #3 Claude Fable 5
  5. #4 Claude Opus 4.7
  6. #1 Muse Wonder
  7. #5 Claude Fable 5.1
  8. #6 Gemini 3.8 Flash
  9. #7 Kimi K3
  10. #8 Muse Spark 1.3
Recent crowns

Last crown changes

  • Oct 2, 2026 — Reasoning: Gemini 4 Argon and Claude Opus 5.5 are co-SOTA
  • Sep 11, 2026 — Reasoning: Claude Opus 4.6 and Claude Fable 5 and Claude Opus 4.7 and Claude Fable 5.1 are co-SOTA
  • Aug 19, 2026 — Reasoning: Claude Opus 4.6 and Claude Fable 5 and Claude Opus 4.7 are co-SOTA
Weights

Which benchmarks count

Who is SOTA in Reasoning?

As of Oct 14, 2026, Gemini 4 Argon & Claude Opus 5.5 are tied for state of the art in Reasoning (since Oct 2, 2026; sources LMArena Text (style-controlled, hard prompts); methodology v1.0).

Since when is the Reasoning crown current?

The current crown in Reasoning has held since Oct 2, 2026.