Gemini 3 Pro vs Grok 4 Fast
Wins 7 of 7 areas
Coding · Agents · Reasoning · Facts · Images and charts · Long documents · Following instructions
Wins 0 of 7 areas
—
Gemini 3 Pro is the stronger all-rounder.Grok 4 Fast is cheaper.
Scores updated · 27 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
- CodingWriting and fixing software30Gemini 3 Pro3 of 3 tests
- AgentsCarrying out multi-step tasks on its own20Gemini 3 Pro2 of 2 tests
- FactsGetting facts right instead of making them up21Gemini 3 Pro2 of 3 tests
- Images and chartsUnderstanding pictures, charts and video10Gemini 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
Images and charts, 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 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+33points ahead
- Abstract visual puzzles that people can solveARC-AGI-2+25.8points ahead
- Hard command-line tasks in a real terminalTerminal-Bench Hard+22.8points ahead
Where Grok 4 Fast pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+23.2points 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 281 rating points14401159+281 rating
- Terminal-Bench HardGemini 3 Pro by 22.841.718.9+22.8
- SciCodeGemini 3 Pro by 11.956.144.2+11.9
AgentsGemini 3 Pro
- BrowseCompGemini 3 Pro by 14.359.244.9+14.3
- GDPValGemini 3 Pro by 8.534.225.7+8.5
ReasoningGemini 3 Pro
- ARC-AGI-2Gemini 3 Pro by 25.831.15.3+25.8
- Humanity's Last ExamGemini 3 Pro by 20.639.719.1+20.6
- CritPtGemini 3 Pro by 6.29.12.9+6.2
- GPQA DiamondGemini 3 Pro by 6.190.884.7+6.1
FactsGemini 3 Pro
- AA-Omniscience · AccuracyGemini 3 Pro by 3355.822.8+33
- AA-Omniscience · Non-hallucinationGrok 4 Fast by 23.28.531.7+23.2
- Vectara HHEM hallucination ratelower is betterGemini 3 Pro by 6.613.620.2+6.6
Images and chartsGemini 3 Pro
- MMMU-ProGemini 3 Pro by 18.480.261.8+18.4
Following instructionsGemini 3 Pro
- IFBenchGemini 3 Pro by 19.970.450.5+19.9
Other results12 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
- ARC-AGI-1Gemini 3 Pro by 26.57548.5+26.5
- SimpleQAGrok 4 Fast by 22.972.195+22.9
- τ²-Bench Telecom (AA run)Gemini 3 Pro by 21.387.165.8+21.3
- Artificial Analysis Coding IndexGemini 3 Pro by 19.146.527.4+19.1
- AA Agentic IndexGemini 3 Pro by 12.55239.5+12.5
- LiveCodeBenchGemini 3 Pro by 129280+12
- AA IntelligenceGemini 3 Pro by 10.12817.9+10.1
- AIME 2025Gemini 3 Pro by 810092+8
- vectara_avg_summary_lengthGrok 4 Fast by 72 rating points101.9173.9+72 rating
- vectara_factual_consistencyGemini 3 Pro by 6.686.479.8+6.6
- vectara_answer_ratetie99.499.5tie
Questions people ask
Which is better, Gemini 3 Pro or Grok 4 Fast?
Gemini 3 Pro wins all seven areas where both have results: coding, agents, reasoning, facts, images and charts, long documents and following instructions. Grok 4 Fast wins none, but costs 95% less.
Which is better for coding?
Gemini 3 Pro. It wins 3 of the 3 coding tests both models report; Grok 4 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 Fast costs $0.20 and $0.50. That makes Grok 4 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 15 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 12 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.