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The LLM benchmark aggregator.

GPT-5.5 Pro

OpenAI

Strongest in Reasoning (#8 of 143, on 2 of its 3 boards), weakest in Reasoning (#14 of 189). Above par in 2 of 2 scopes. Among the models it meets almost everywhere, it finishes behind Claude Opus 5.5 and Claude Fable 5.1 and ahead of GPT-5.4 and Claude Fable.

§ 1 · Profile

What it is good at

Bars run from 50 — the average of the models each source lists — so right of the line is above par. The middle column is the gap to whoever leads that scope.

Reasoning59.6#14/189
Reasoning63.8#8/143

§ 2 · Head to head

What it beats, and what beats it

The same models turn up scope after scope. Counted once: where both were placed, who finished higher. Bars run right for GPT-5.5 Pro, left for the other.

GPT-4o Miniwon 2 · lost 0
NVIDIA Nemotron 3.5 Lightning 30B A3Bwon 2 · lost 0
GPT-4owon 2 · lost 0
Command R Pluswon 2 · lost 0
Llama 3.3 70B Instructwon 2 · lost 0
Grok 2won 2 · lost 0
Llama 4 Scout Instructwon 2 · lost 0
Gemini 1.5 Prowon 2 · lost 0
GPT-4.1 Nanowon 2 · lost 0
GPT-3.5 Turbowon 2 · lost 0
Gemini 2.0 Flashwon 2 · lost 0
O1 Miniwon 2 · lost 0
Claude 3.5 Sonnetwon 2 · lost 0
Gemma 4 31Bwon 2 · lost 0
Llama 4 Maverick Instructwon 2 · lost 0
GPT-4.1won 2 · lost 0
Mistral Large 3won 2 · lost 0
MiniMax M3won 2 · lost 0
DeepSeek V3won 2 · lost 0
Mistral Large v2won 2 · lost 0
Llama 3.1 405B Instructwon 2 · lost 0
Claude 3 Opuswon 2 · lost 0
Gemini 3.5 Flash Litewon 2 · lost 0
MiniMax M2won 2 · lost 0
GPT-4 Turbowon 2 · lost 0
GPT-4.5won 2 · lost 0
Muse Spark Openwon 2 · lost 0
Claude Haiku 4.5won 2 · lost 0
Ox Alphawon 2 · lost 0
GPT-4.1 Miniwon 2 · lost 0
Gemini 2.0 Flash Thinkingwon 2 · lost 0
Gemini Exp 1206won 2 · lost 0
Kimi K2won 2 · lost 0
GLM-5.3 Flashwon 2 · lost 0
Grok 3won 2 · lost 0
Kimi K2.7 Codewon 2 · lost 0
Claude 3.7 Sonnetwon 2 · lost 0
Magistral Smallwon 2 · lost 0
Magistral Mediumwon 2 · lost 0
Gemini 2.5 Flashwon 2 · lost 0
Inkling Smallwon 2 · lost 0
Qwen 3.6 Flashwon 2 · lost 0
Codex Mini (Latest)won 2 · lost 0
Qwen3 235B A22B Instructwon 2 · lost 0
O3 Miniwon 2 · lost 0
O3 Prowon 2 · lost 0
Nemotron 3.5 Super VLwon 2 · lost 0
Beam 1.0won 2 · lost 0
Claude Opus 4won 2 · lost 0
DeepSeek R1won 2 · lost 0
GPT-5 Nanowon 2 · lost 0
Mistral Large 4won 2 · lost 0
DeepSeek V3.1won 2 · lost 0
NVIDIA Nemotron 3 Ultra 550B A55Bwon 2 · lost 0
Step 5won 2 · lost 0
Qwen3.8 27Bwon 2 · lost 0
O4 Miniwon 2 · lost 0
GPT-5.4 Miniwon 2 · lost 0
O1won 2 · lost 0
Claude Sonnet 4won 2 · lost 0
GPT OSS 120Bwon 2 · lost 0
MiniMax M2.1won 2 · lost 0
Mimo V2.6 Prowon 2 · lost 0
Inklingwon 2 · lost 0
DeepSeek V4 Flash Visionwon 2 · lost 0
Grok 3 Miniwon 2 · lost 0
DeepSeek 3.2 Specialewon 2 · lost 0
Grok 4.7won 2 · lost 0
Kimi K2 Thinkingwon 2 · lost 0
GPT-6 Lunawon 2 · lost 0
DeepSeek V3.2won 2 · lost 0
GPT-5 Prowon 2 · lost 0
GPT-5.4 Nanowon 2 · lost 0
GPT-5 Miniwon 2 · lost 0
MiniMax M2.5won 2 · lost 0
O3won 2 · lost 0
Qwen3.8 Flashwon 2 · lost 0
GPT-5.6 Lunawon 2 · lost 0
Kimi K2.5won 2 · lost 0
Claude Sonnet 4.5won 2 · lost 0
GLM-5won 2 · lost 0
GLM-5.2won 2 · lost 0
GLM-5.3won 2 · lost 0
Gemini 2.5 Prowon 2 · lost 0
Grok 4 Fastwon 2 · lost 0
Claude Opus 4.1won 2 · lost 0
GPT-5.2 Prowon 2 · lost 0
GLM-4.7won 2 · lost 0
DeepSeek V4 Flashwon 2 · lost 0
Qwen3.8 2.4T A95Bwon 2 · lost 0
Qwen3.6 Maxwon 2 · lost 0
Gemini 3.6 Flashwon 2 · lost 0
GPT-5won 2 · lost 0
GPT-5.1won 2 · lost 0
Qwen3.7 Maxwon 2 · lost 0
Claude Sonnet 4.6won 2 · lost 0
Grok 4.5won 2 · lost 0
Muse Spark 1.2won 2 · lost 0
Gemini 3.5 Flashwon 2 · lost 0
Claude 4.7won 2 · lost 0
Dots3 Notewon 2 · lost 0
Qwen3.8 Maxwon 2 · lost 0
DeepSeek V4 Prowon 2 · lost 0
GLM-5.1won 2 · lost 0
Claude Haiku 5.5won 2 · lost 0
Grok 4.1 Fastwon 2 · lost 0
Grok 4won 2 · lost 0
GPT-5.4 Prowon 2 · lost 0
Claude Opus 4.5won 2 · lost 0
Gemini 3 Deep Thinkwon 2 · lost 0
Kimi K3won 2 · lost 0
DeepSeek V4.1 Flashwon 2 · lost 0
GPT-5.6 Sol Prowon 2 · lost 0
Gemini 3 Flashwon 2 · lost 0
GPT-5.2won 2 · lost 0
Gemini 3.1 Prowon 2 · lost 0
Claude Sonnet 5won 2 · lost 0
Gemini 3.7 Flashwon 2 · lost 0
Claude Opus 4.6won 2 · lost 0
GPT-5.6 Terrawon 2 · lost 0
Grok 4.20won 2 · lost 0
Claude Opus 4.7won 2 · lost 0
Grok 4.6won 2 · lost 0
Muse Spark 1.3won 2 · lost 0
Claude Opus 4.8won 2 · lost 0
Muse Wonderwon 2 · lost 0
Gemini 3.8 Flashwon 2 · lost 0
Claude Fablewon 2 · lost 0
GPT-5.4won 2 · lost 0
Gemini 3 Prowon 1 · lost 1
GPT-5.5won 1 · lost 1
GPT-6 Solwon 1 · lost 1
GPT-5.6 Solwon 1 · lost 1
Claude Fable 5won 1 · lost 1
Claude Sonnet 5.5won 1 · lost 1
GPT-6 Astra Prowon 0 · lost 2
Gemini 4 Argonwon 0 · lost 2
Claude Opus 5won 0 · lost 2
GPT-6.1 Solwon 0 · lost 2
GPT-6 Astrawon 0 · lost 2
Claude Fable 5.1won 0 · lost 2
Claude Opus 5.5won 0 · lost 2

§ 3 · Sources

Where the numbers come from

2 publications, 2 figures. Every one links to the page it was read from.

ARC-AGI-2 ↗1 measureread 2026-10-19
ARC-AGI-2 84.2%
SimpleBench ↗1 measureread 2026-10-19
SimpleBench 76.9%

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