Compare · ModelsLive · 2 picked · head to head
Gemini 3 Pro vs GPT-5.5 Pro
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
GPT-5.5 Pro wins on 7/9 benchmarks
GPT-5.5 Pro wins 7 of 9 shared benchmarks. Leads in reasoning · knowledge · math.
Category leads
reasoning·GPT-5.5 Proknowledge·GPT-5.5 Promath·GPT-5.5 Pro
Hype vs Reality
Attention vs performance
Gemini 3 Pro
#78 by perf·#10 by attention
GPT-5.5 Pro
#8 by perf·#9 by attention
Vendor risk
Who is behind the model
Google DeepMind
$3.61T·Tier 1
OpenAI
$840.0B·Tier 1
Head to head
9 benchmarks · 2 models
Gemini 3 ProGPT-5.5 Pro
ARC-AGI
GPT-5.5 Pro leads by +21.5
ARC-AGI · the original Abstraction and Reasoning Corpus, testing whether AI can solve novel visual pattern recognition tasks without memorization.
Gemini 3 Pro
75.0
GPT-5.5 Pro
96.5
ARC-AGI-2
GPT-5.5 Pro leads by +53.5
ARC-AGI-2 · the second iteration of the Abstraction and Reasoning Corpus, testing novel pattern recognition and abstract reasoning without prior training data.
Gemini 3 Pro
31.1
GPT-5.5 Pro
84.6
Chess Puzzles
GPT-5.5 Pro leads by +32.6
Chess Puzzles · tests strategic and tactical reasoning by having models solve chess puzzle positions, evaluating lookahead and pattern recognition abilities.
Gemini 3 Pro
27.4
GPT-5.5 Pro
60.0
FrontierMath-2025-02-28-Private
Gemini 3 Pro leads by +13.6
FrontierMath (Feb 2025) · original research-level math problems created by mathematicians, testing capabilities at the boundary of current AI mathematical reasoning.
Gemini 3 Pro
66.0
GPT-5.5 Pro
52.4
FrontierMath-Tier-4-2025-07-01-Private
GPT-5.5 Pro leads by +8.4
FrontierMath Tier 4 (Jul 2025) · the most challenging tier of frontier mathematics, containing problems that push the absolute limits of AI mathematical reasoning.
Gemini 3 Pro
31.3
GPT-5.5 Pro
39.6
GPQA diamond
GPT-5.5 Pro leads by +1.8
Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs.
Gemini 3 Pro
93.9
GPT-5.5 Pro
95.7
OTIS Mock AIME 2024-2025
GPT-5.5 Pro leads by +8.6
OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills.
Gemini 3 Pro
91.4
GPT-5.5 Pro
100.0
SimpleBench
GPT-5.5 Pro leads by +0.6
SimpleBench · tests fundamental reasoning capabilities with straightforward problems designed to expose gaps in basic logical and spatial thinking.
Gemini 3 Pro
71.7
GPT-5.5 Pro
72.3
SimpleQA Verified
Gemini 3 Pro leads by +8.4
SimpleQA Verified · short factual questions with verified answers, measuring factual accuracy and the tendency to hallucinate or provide incorrect information.
Gemini 3 Pro
72.9
GPT-5.5 Pro
64.5
Full benchmark table
| Benchmark | Gemini 3 Pro | GPT-5.5 Pro |
|---|---|---|
ARC-AGI ARC-AGI · the original Abstraction and Reasoning Corpus, testing whether AI can solve novel visual pattern recognition tasks without memorization. | 75.0 | 96.5 |
ARC-AGI-2 ARC-AGI-2 · the second iteration of the Abstraction and Reasoning Corpus, testing novel pattern recognition and abstract reasoning without prior training data. | 31.1 | 84.6 |
Chess Puzzles Chess Puzzles · tests strategic and tactical reasoning by having models solve chess puzzle positions, evaluating lookahead and pattern recognition abilities. | 27.4 | 60.0 |
FrontierMath-2025-02-28-Private FrontierMath (Feb 2025) · original research-level math problems created by mathematicians, testing capabilities at the boundary of current AI mathematical reasoning. | 66.0 | 52.4 |
FrontierMath-Tier-4-2025-07-01-Private FrontierMath Tier 4 (Jul 2025) · the most challenging tier of frontier mathematics, containing problems that push the absolute limits of AI mathematical reasoning. | 31.3 | 39.6 |
GPQA diamond Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs. | 93.9 | 95.7 |
OTIS Mock AIME 2024-2025 OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills. | 91.4 | 100.0 |
SimpleBench SimpleBench · tests fundamental reasoning capabilities with straightforward problems designed to expose gaps in basic logical and spatial thinking. | 71.7 | 72.3 |
SimpleQA Verified SimpleQA Verified · short factual questions with verified answers, measuring factual accuracy and the tendency to hallucinate or provide incorrect information. | 72.9 | 64.5 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| n/a | n/a | n/a | n/a | |
| $30.00 | $180.00 | 1.1M tokens (~525 books) | $675.00 |