Gemini 3 Pro vs Grok 4.1 Fast
Wins 7 of 8 areas
Coding · Agents · Reasoning · Facts · Images and charts · Long documents · Following instructions
Wins 1 of 8 areas
Math
Gemini 3 Pro is the stronger all-rounder.Grok 4.1 Fast is cheaper and better at math.
Scores updated · 27 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.
- ReasoningHard problems that need careful thinking40Gemini 3 Pro4 of 4 tests
- CodingWriting and fixing software30Gemini 3 Pro3 of 3 tests
- Images and chartsUnderstanding pictures, charts and video20Gemini 3 Pro2 of 2 tests
- FactsGetting facts right instead of making them up21Gemini 3 Pro2 of 3 tests
- AgentsCarrying out multi-step tasks on its own10Gemini 3 Pro1 of 1 test
- Long documentsFinding answers in very long texts10Gemini 3 Pro1 of 1 test
- Following instructionsDoing exactly what it is asked10Gemini 3 Pro1 of 1 test
- MathCompetition and research-level math01Grok 4.1 Fast1 of 2 tests · 1 tie
Agents, 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.
Grok 4.1 Fast costs 95% 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
- Answers hard knowledge questions correctlyAA-Omniscience · Accuracy+30.7points ahead
- Very hard expert questions across many subjectsHumanity's Last Exam+20.4points ahead
- Common-sense trick questionsSimpleBench+20.4points ahead
Where Grok 4.1 Fast pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+18.1points ahead
- US invitational high-school math exam problemsAIME 2026+2.5points ahead
Every test, side by side
All 27 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingGemini 3 Pro
- LMArena · WebDevGemini 3 Pro by 200 rating points14401240+200 rating
- Terminal-Bench HardGemini 3 Pro by 17.541.724.2+17.5
- SciCodeGemini 3 Pro by 11.956.144.2+11.9
ReasoningGemini 3 Pro
- Humanity's Last ExamGemini 3 Pro by 20.439.719.3+20.4
- SimpleBenchGemini 3 Pro by 20.476.456+20.4
- CritPtGemini 3 Pro by 6.29.12.9+6.2
- GPQA DiamondGemini 3 Pro by 5.590.885.3+5.5
FactsGemini 3 Pro
- AA-Omniscience · AccuracyGemini 3 Pro by 30.755.825.1+30.7
- AA-Omniscience · Non-hallucinationGrok 4.1 Fast by 18.18.526.6+18.1
- Vectara HHEM hallucination ratelower is betterGemini 3 Pro by 5.613.619.2+5.6
Images and chartsGemini 3 Pro
- MMMU-ProGemini 3 Pro by 16.980.263.3+16.9
- LMArena · VisionGemini 3 Pro by 104 rating points13051201+104 rating
MathGrok 4.1 Fast
- AIME 2026Grok 4.1 Fast by 2.591.794.2+2.5
- HMMT Feb. 2026tie86.486.4tie
Following instructionsGemini 3 Pro
- IFBenchGemini 3 Pro by 17.770.452.7+17.7
Other results10 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 45.215.3-29.9+45.2
- Artificial Analysis Coding IndexGemini 3 Pro by 2746.519.5+27
- AA Agentic IndexGemini 3 Pro by 19.15232.9+19.1
- matharena_visual_math_overallGemini 3 Pro by 15.284.269+15.2
- AA IntelligenceGemini 3 Pro by 7.62820.4+7.6
- τ²-Bench Telecom (AA run)Grok 4.1 Fast by 6.287.193.3+6.2
- vectara_factual_consistencyGemini 3 Pro by 5.686.480.8+5.6
- vectara_answer_ratetie99.499.7tie
- vectara_avg_summary_lengthtie101.999.5tie
- HMMT Nov. 2025tie93.393.3tie
Questions people ask
Which is better, Gemini 3 Pro or Grok 4.1 Fast?
Gemini 3 Pro wins seven of the eight areas we test: coding, agents, reasoning, facts, images and charts, long documents and following instructions. Grok 4.1 Fast wins math, and costs 95% less.
Which is better for coding?
Gemini 3 Pro. It wins 3 of the 3 coding tests both models report; Grok 4.1 Fast wins none.
Which is cheaper?
Gemini 3 Pro costs $2.00 per million input tokens and $12.00 per million output tokens; Grok 4.1 Fast costs $0.20 and $0.50. That makes Grok 4.1 Fast about 95% cheaper for the same work.
How do you compare the two?
We use the 27 benchmark tests both models have published scores on. The verdict counts the 17 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 10 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.