Gemini 3 Pro vs GPT-5.5
Wins 1 of 8 areas
Images and charts
Wins 7 of 8 areas
Coding · Agents · Reasoning · Facts · Math · Long documents · Following instructions
GPT-5.5 is the stronger all-rounder.Gemini 3 Pro is cheaper and better at images and charts.
Scores updated · 44 tests both models report · How we compare
Where each one wins
Tests won in each of the eight areas we test. Each piece is one test, so a longer bar means more evidence; grey means the two scored within a point of each other.
- AgentsCarrying out multi-step tasks on its own04GPT-5.54 of 4 tests
- ReasoningHard problems that need careful thinking14GPT-5.54 of 5 tests
- CodingWriting and fixing software03GPT-5.53 of 4 tests · 1 tie
- FactsGetting facts right instead of making them up13GPT-5.53 of 4 tests
- MathCompetition and research-level math02GPT-5.52 of 2 tests
- Long documentsFinding answers in very long texts01GPT-5.51 of 1 test
- Following instructionsDoing exactly what it is asked01GPT-5.51 of 1 test
- Images and chartsUnderstanding pictures, charts and video30Gemini 3 Pro3 of 4 tests · 1 tie
Long documents and following instructions rest on a single test each.
What it costs
Prices per million tokens, roughly 750,000 words. The bars show the cost of a million tokens read plus a million written.
Gemini 3 Pro costs 60% less for the same work.
The biggest differences
The three tests each model wins by the widest margin. Scores are out of 100.
Where GPT-5.5 pulls ahead
- Abstract visual puzzles that people can solveARC-AGI-2+53.9points ahead
- Finds hard-to-locate facts by browsing the webBrowseComp+25.2points ahead
- Multi-step tasks using many real software toolsMCP Atlas+21.2points ahead
Where Gemini 3 Pro pulls ahead
- Short factual questions, answered correctlySimpleQA Verified+9.9points ahead
- Common-sense trick questionsSimpleBench+7.4points ahead
- Math problems shown in pictures and chartsMathVista+5.6points ahead
Every test, side by side
All 44 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingGPT-5.5
- Terminal-Bench HardGPT-5.5 by 18.941.760.6+18.9
- SWE-bench ProGPT-5.5 by 15.343.358.6+15.3
- LMArena · WebDevGPT-5.5 by 73 rating points14401513+73 rating
- SciCodetie56.155.8tie
AgentsGPT-5.5
- BrowseCompGPT-5.5 by 25.259.284.4+25.2
- MCP AtlasGPT-5.5 by 21.254.175.3+21.2
- AA ApexAgentsGPT-5.5 by 19.318.437.7+19.3
- GDPValGPT-5.5 by 8.534.242.7+8.5
ReasoningGPT-5.5
- ARC-AGI-2GPT-5.5 by 53.931.185+53.9
- CritPtGPT-5.5 by 189.127.1+18
- SimpleBenchGemini 3 Pro by 7.476.469+7.4
- Humanity's Last ExamGPT-5.5 by 6.139.745.8+6.1
- GPQA DiamondGPT-5.5 by 2.790.893.5+2.7
FactsGPT-5.5
- SimpleQA VerifiedGemini 3 Pro by 9.972.963+9.9
- Vectara HHEM hallucination ratelower is betterGPT-5.5 by 4.313.69.3+4.3
- AA-Omniscience · Non-hallucinationGPT-5.5 by 2.58.511+2.5
- AA-Omniscience · AccuracyGPT-5.5 by 2.255.858+2.2
Images and chartsGemini 3 Pro
- MathVistaGemini 3 Pro by 5.689.884.2+5.6
- OCRBenchv2Gemini 3 Pro by 2.363.461.1+2.3
- LMArena · VisionGemini 3 Pro by 13 rating points13051292+13 rating
- MMMU-Protie80.279.9tie
MathGPT-5.5
- HMMT Feb. 2026GPT-5.5 by 12.186.498.5+12.1
- AIME 2026GPT-5.5 by 8.391.7100+8.3
Other results19 tests, not counted
Tests outside the eight areas. They are not counted above: several are summary scores built from other tests, or the same test under another name.
- GDPval-AA (Elo)GPT-5.5 by 574 rating points11951769+574 rating
- Terminal-Bench 2.0GPT-5.5 by 28.554.282.7+28.5
- Artificial Analysis Coding IndexGPT-5.5 by 28.446.574.9+28.4
- ARC-AGI-1GPT-5.5 by 207595+20
- ToolathlonGPT-5.5 by 19.236.455.6+19.2
- frontiermath_tier_4_v1GPT-5.5 by 16.618.835.4+16.6
- AA Agentic IndexGemini 3 Pro by 14.75237.3+14.7
- WorldVQAGemini 3 Pro by 12.847.434.6+12.8
- SimpleVQAGemini 3 Pro by 11.169.758.6+11.1
- matharena_visual_math_overallGPT-5.5 by 10.784.294.9+10.7
- AA IntelligenceGPT-5.5 by 10.42838.4+10.4
- LiveBenchGPT-5.5 by 7.373.480.7+7.3
- τ²-Bench Telecom (AA run)GPT-5.5 by 6.887.193.9+6.8
- HLE (with tools)GPT-5.5 by 6.445.852.2+6.4
- AA-OmniscienceGPT-5.5 by 5.215.320.5+5.2
- vectara_factual_consistencyGPT-5.5 by 4.386.490.7+4.3
- HMMT Nov. 2025GPT-5.5 by 3.293.396.5+3.2
- vectara_avg_summary_lengthGPT-5.5 by 27.7 rating points101.9129.6+27.7 rating
- vectara_answer_ratetie99.4100tie
Questions people ask
Which is better, Gemini 3 Pro or GPT-5.5?
GPT-5.5 wins seven of the eight areas we test: coding, agents, reasoning, facts, math, long documents and following instructions. Gemini 3 Pro wins images and charts, and costs 60% less.
Which is better for coding?
GPT-5.5. It wins 3 of the 4 coding tests both models report; Gemini 3 Pro wins none, and 1 is a tie.
Which is cheaper?
Gemini 3 Pro costs $2.00 per million input tokens and $12.00 per million output tokens; GPT-5.5 costs $5.00 and $30.00. That makes Gemini 3 Pro about 60% cheaper for the same work.
How do you compare the two?
We use the 44 benchmark tests both models have published scores on. The verdict counts the 25 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 19 are listed but not counted, because several are summary scores or repeat a test. Each score is the one shown on the model's own page.