# Is Claude Opus 5.5 SOTA?

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

SOTA in co-SOTA in Reasoning, co-SOTA in Coding, co-SOTA in Coding › Agentic, Coding › Web dev, co-SOTA in Long context and co-SOTA in Factuality.

As of Oct 14, 2026, Claude Opus 5.5 is tied for state of the art in Reasoning (since Oct 2, 2026; sources LMArena Text (style-controlled, hard prompts); methodology v1.0). Claude Opus 5.5 is tied for SOTA in Reasoning with Gemini 4 Argon, within the margin of error, since 2026-10-02.

Methodology v1.0. Computed automatically.

- General LLM: NEAR_SOTA #2 — Close in General LLM: rank #2, 1.4 percentile points behind the leader.
- Reasoning: CO_SOTA #1 — Claude Opus 5.5 is tied for SOTA in Reasoning with Gemini 4 Argon, within the margin of error, since 2026-10-02.
- Math: INSUFFICIENT_DATA — #11 on LMArena Text (style-controlled, math); missing Humanity's Last Exam and FrontierMath
- Science: RANKED #31 — Last listed at #31 in Science on 2026-09-22. That board does not award a crown.
- Coding: CO_SOTA #1 — Claude Opus 5.5 is tied for SOTA in Coding with Claude Sonnet 5.5, within the margin of error, since 2026-10-06.
- Coding › Agentic: CO_SOTA #1 — Claude Opus 5.5 is tied for SOTA in Coding › Agentic with Claude Sonnet 5.5, within the margin of error, since 2026-10-06.
- Coding › Web dev: SOTA #1 — Claude Opus 5.5 is SOTA in Coding › Web dev since 2026-09-29. No eligible model is credibly ahead on the weighted primary evidence.
- Long context: CO_SOTA #1 — Claude Opus 5.5 is tied for SOTA in Long context with Gemini 4 Argon, within the margin of error, since 2026-10-02.
- Vision: NEAR_SOTA #4 — Close in Vision: rank #4, 13.2 percentile points behind the leader.
- Factuality: CO_SOTA #1 — Claude Opus 5.5 is tied for SOTA in Factuality with Gemini 4 Argon, Claude Fable 5.1, within the margin of error, since 2026-10-02.
- Abstraction (ARC): RANKED #1 — Last listed at #1 in Abstraction (ARC) on 2026-09-22. That board does not award a crown.

## Factuality

https://isitsota.com/c/factuality