Gemini 3 Pro is the stronger all-rounder.
Scores updated · 9 tests both models report · How we compare
Where each one wins
Tests won in each of the three 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.
Facts 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 86% 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
- Abstract visual puzzles that people can solveARC-AGI-2+26.2points ahead
- Graduate-level biology, physics and chemistry questionsGPQA Diamond+6.3points ahead
- Keeps track of context across a multi-turn chatMulti-Challenge+3.3points ahead
Where o3-pro pulls ahead
No clear win on a test scored out of 100.
Every test, side by side
All 9 tests both models report. The winning score is in its model's colour; marks a score checked independently.
ReasoningGemini 3 Pro
- ARC-AGI-2Gemini 3 Pro by 26.231.14.9+26.2
- GPQA DiamondGemini 3 Pro by 6.390.884.5+6.3
FactsGemini 3 Pro
- Vectara HHEM hallucination ratelower is betterGemini 3 Pro by 9.713.623.3+9.7
Following instructionsGemini 3 Pro
- Multi-ChallengeGemini 3 Pro by 3.365.762.4+3.3
Other results5 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.
- ARC-AGI-1Gemini 3 Pro by 15.77559.3+15.7
- vectara_factual_consistencyGemini 3 Pro by 9.786.476.7+9.7
- AA IntelligenceGemini 3 Pro by 6.12821.9+6.1
- vectara_avg_summary_lengtho3-pro by 25.5 rating points101.9127.4+25.5 rating
- vectara_answer_ratetie99.4100tie
Questions people ask
Which is better, Gemini 3 Pro or o3-pro?
Gemini 3 Pro wins all three areas where both have results: reasoning, facts and following instructions. o3-pro wins none.
Which is cheaper?
Gemini 3 Pro costs $2.00 per million input tokens and $12.00 per million output tokens; o3-pro costs $20.00 and $80.00. That makes Gemini 3 Pro about 86% cheaper for the same work.
How do you compare the two?
We use the 9 benchmark tests both models have published scores on. The verdict counts the 4 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 5 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.