VERIFIEDOct 132026
Is Claude Opus 5.5 state of the art?
Yes.SOTA in co-SOTA in Reasoning, co-SOTA in Coding and co-SOTA in Coding › Agentic.
As of Oct 13, 2026, Claude Opus 5.5 from Anthropic. SOTA in co-SOTA in Reasoning, co-SOTA in Coding and co-SOTA in Coding › Agentic. Claude Opus 5.5 is tied for SOTA in Coding with Claude Sonnet 5.5, within the margin of error, since 2026-10-06.
General LLMNot SOTA · #4#4 · 0dGeneral LLM · paretoNot SOTA · #4#4 · 0dReasoningCo-SOTA#5 · 5dReasoning · paretoNot SOTA · #5#5 · 0dCodingCo-SOTA#1 · 7dCoding · paretoNot SOTA · #1#1 · 0dCoding › AgenticCo-SOTA#1 · 7dCoding › Agentic · paretoPareto#1 · 0dCoding › Web devNot SOTA · #1#1 · 0dCoding › Web dev · paretoPareto#1 · 0d
Why
The ruling, in plain English
Ranked #4 in General LLM.
Receipts
Evidence
| Source | Score | Date | Type | Receipt |
|---|---|---|---|---|
| LMArena Text (style-controlled, overall) claude-opus-5.5-high · high | 1507.0758687407206 1499.0–1515.2 | 2026-10-08 | INDEP. | snap_51142aff7bb5 |
| LMArena Text (style-controlled, hard prompts) claude-opus-5.5-high · high | 1533.2208179885247 1523.1–1543.3 | 2026-10-08 | INDEP. | snap_51142aff7bb5 |
| Terminal-Bench 4.0 Opus 5.5 max · max | 64.85 61.7–68.0 | 2026-10-06 | INDEP. | snap_13678220dcf7 |
| LMArena WebDev claude-opus-5.5-max · max | 1813.028149728328 1797.7–1828.4 | 2026-10-08 | INDEP. | snap_6c327280fd30 |
| LMArena Text (style-controlled, longer query) claude-opus-5.5-high · high | 1523.687615434491 1511.3–1536.1 | 2026-10-08 | INDEP. | snap_51142aff7bb5 |
| GDP.pdf claude-opus-5-5_max · max | 0.306 | 2026-09-22 | INDEP. | snap_f9d8103e52c2 |
| LMArena Text factuality claude-opus-5.5-high · high | 1509.2033268058926 1502.2–1516.2 | 2026-10-08 | INDEP. | snap_ee60de771ba0 |
Reign history
Where it sits in the succession
Reasoning
Gemini 1.5 Pro 002
Gemini 2.5 Pro Exp 03.25
Gemini 2.5 Pro Preview 05.06
Gemini 2.5 Pro Preview 06.05
O3
O4 Mini
Gemini 2.5 Pro Preview 06.05
GPT-5
GPT-5 Mini
O3
Gemini 3 Pro Preview
GPT-5 Pro
Gemini 2.5 Pro
Gemini 3 Pro Preview
GPT-5 Pro
Claude Opus 4.1
Gemini 3 Pro Preview
GPT-5 Pro
Claude Opus 4.1
Claude Opus 4.6
Gemini 3 Pro Preview
GPT-5 Pro
Claude Opus 4.6
Gemini 3 Pro Preview
GLM 5
GPT-5 Pro
Claude Opus 4.6
Claude Sonnet 4.5
Gemini 3 Pro Preview
GPT-5 Pro
Claude Sonnet 4.5
Gemini 3.1 Pro Preview
Claude Sonnet 4.5
Gemini 3.1 Pro Preview
GPT-5.4 Pro
Gemini 3.1 Pro Preview
GPT-5.4 Mini
GPT-5.4 Pro
Gemini 3.1 Pro Preview
GPT-5.4 Mini
GPT-5.4 Pro
Muse Spark
Claude Opus 4.5
Gemini 3.1 Pro Preview
GPT-5.4 Pro
Muse Spark
Gemini 3.1 Pro Preview
GLM 5.1
GPT-5.4 Pro
Muse Spark
Gemini 3.1 Pro Preview
GPT-5.4 Pro
GPT-5.5
Muse Spark
Claude Sonnet 4.6
Gemini 3.1 Pro Preview
GPT-5.4
GPT-5.4 Pro
Muse Spark
Gemini 3.1 Pro Preview
Gemini 3 Pro
GPT-5.4 Pro
Muse Spark
Gemini 3.1 Pro Preview
GPT-5.4 Pro
Kimi K3
Muse Spark
Gemini 3.1 Pro Preview
GLM 5.3
GPT-5.4 Pro
Muse Spark
Claude Fable 5.1
Gemini 3.1 Pro Preview
Gemini 3.7 Flash
GPT-5.4 Pro
Muse Spark
Claude Fable 5.1
Gemini 3.1 Pro Preview
Gemini 3.7 Flash
Gemini 3.8 Flash
GPT-5.4 Pro
Muse Spark
Gemini 3.7 Flash
GPT-6 Astra
GPT-6 Astra
Muse Spark 1.1
Claude Fable 5
GPT-6 Astra
Claude Opus 5
GPT-6 Astra
Claude Opus 5.5
Gemini 4 Argon
GPT-6 Astra
Coding
Claude Opus 5.5
Claude Sonnet 5.5
Coding › Agentic
Claude Opus 5.5
Claude Sonnet 5.5
Honest about the gaps
Where it is not the crown
| Category | This model | Why |
|---|---|---|
| General LLM | Not SOTA · #4 | Ranked #4 in General LLM. |
| Coding › Web dev | Not SOTA · #1 | Ranked #1 in Coding › Web dev. |
| Long context | Not SOTA · #5 | Ranked #5 in Long context. |
| Vision | Not SOTA · #3 | Ranked #3 in Vision. |
| Factuality | Not SOTA · #2 | Ranked #2 in Factuality. |