Gemini 3 Pro vs o4-mini
Wins 7 of 7 areas
Coding · Agents · Reasoning · Facts · Images and charts · Long documents · Following instructions
Wins 0 of 7 areas
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Gemini 3 Pro is the stronger all-rounder.o4-mini is cheaper.
Scores updated · 38 tests both models report · How we compare
Where each one wins
Tests won in each of the seven areas where both have results. Each piece is one test, so a longer bar means more evidence; grey means the two scored within a point of each other.
- ReasoningHard problems that need careful thinking40Gemini 3 Pro4 of 4 tests
- Images and chartsUnderstanding pictures, charts and video40Gemini 3 Pro4 of 4 tests
- CodingWriting and fixing software30Gemini 3 Pro3 of 3 tests
- FactsGetting facts right instead of making them up31Gemini 3 Pro3 of 4 tests
- AgentsCarrying out multi-step tasks on its own20Gemini 3 Pro2 of 2 tests
- Following instructionsDoing exactly what it is asked20Gemini 3 Pro2 of 2 tests
- Long documentsFinding answers in very long texts10Gemini 3 Pro1 of 1 test
Long documents rests on a single test.
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.
o4-mini costs 61% less for the same work.
The biggest differences
The tests each model wins by the widest margin, up to three each. Scores are out of 100.
Where Gemini 3 Pro pulls ahead
- Short factual questions, answered correctlySimpleQA Verified+54.1points ahead
- Answers hard knowledge questions correctlyAA-Omniscience · Accuracy+31points ahead
- Hard command-line tasks in a real terminalTerminal-Bench Hard+26.5points ahead
Where o4-mini pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+11points ahead
Every test, side by side
All 38 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingGemini 3 Pro
- Terminal-Bench HardGemini 3 Pro by 26.541.715.2+26.5
- SciCodeGemini 3 Pro by 9.656.146.5+9.6
- SWE-bench VerifiedGemini 3 Pro by 8.176.268.1+8.1
AgentsGemini 3 Pro
- GDPValGemini 3 Pro by 8.834.225.4+8.8
- BrowseCompGemini 3 Pro by 7.759.251.5+7.7
ReasoningGemini 3 Pro
- ARC-AGI-2Gemini 3 Pro by 2531.16.1+25
- Humanity's Last ExamGemini 3 Pro by 23.239.716.5+23.2
- GPQA DiamondGemini 3 Pro by 12.490.878.4+12.4
- CritPtGemini 3 Pro by 8.59.10.6+8.5
FactsGemini 3 Pro
- SimpleQA VerifiedGemini 3 Pro by 54.172.918.8+54.1
- AA-Omniscience · AccuracyGemini 3 Pro by 3155.824.8+31
- AA-Omniscience · Non-hallucinationo4-mini by 118.519.5+11
- Vectara HHEM hallucination ratelower is betterGemini 3 Pro by 513.618.6+5
Images and chartsGemini 3 Pro
- LMArena · VisionGemini 3 Pro by 111 rating points13051194+111 rating
- MMMU-ProGemini 3 Pro by 1180.269.2+11
- CharXiv (RQ)Gemini 3 Pro by 9.481.472+9.4
- MathVistaGemini 3 Pro by 5.589.884.3+5.5
Following instructionsGemini 3 Pro
- Multi-ChallengeGemini 3 Pro by 22.765.743+22.7
- IFBenchGemini 3 Pro by 1.770.468.7+1.7
Other results18 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.
- AA-OmniscienceGemini 3 Pro by 5115.3-35.7+51
- τ²-Bench Telecom (AA run)Gemini 3 Pro by 31.587.155.6+31.5
- HarmBencho4-mini by 24.572.597+24.5
- Artificial Analysis Coding IndexGemini 3 Pro by 20.946.525.6+20.9
- ARC-AGI-1Gemini 3 Pro by 16.37558.7+16.3
- AA Agentic IndexGemini 3 Pro by 15.95236.1+15.9
- LiveCodeBenchGemini 3 Pro by 14.69277.4+14.6
- frontiermath_tier_4_v1Gemini 3 Pro by 12.518.86.3+12.5
- AA IntelligenceGemini 3 Pro by 11.32816.7+11.3
- AIME 2025Gemini 3 Pro by 7.310092.7+7.3
- AIR-Bench 2024o4-mini by 5.373.278.5+5.3
- vectara_factual_consistencyGemini 3 Pro by 586.481.4+5
- bbqGemini 3 Pro by 4.498.494+4.4
- vectara_avg_summary_lengtho4-mini by 25.8 rating points101.9127.7+25.8 rating
- simple_safety_testso4-mini by 2.597.5100+2.5
- anthropic_red_teamo4-mini by 1.19798.2+1.1
- vectara_answer_ratetie99.499.2tie
- XSTesttie97.397.4tie
Questions people ask
Which is better, Gemini 3 Pro or o4-mini?
Gemini 3 Pro wins all seven areas where both have results: coding, agents, reasoning, facts, images and charts, long documents and following instructions. o4-mini wins none, but costs 61% less.
Which is better for coding?
Gemini 3 Pro. It wins 3 of the 3 coding tests both models report; o4-mini wins none.
Which is cheaper?
Gemini 3 Pro costs $2.00 per million input tokens and $12.00 per million output tokens; o4-mini costs $1.10 and $4.40. That makes o4-mini about 61% cheaper for the same work.
How do you compare the two?
We use the 38 benchmark tests both models have published scores on. The verdict counts the 20 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 18 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.