Gemini 3.1 Flash Lite Preview vs Gemini 3 Pro
Wins 1 of 7 areas
Facts
Wins 5 of 7 areas
Coding · Agents · Reasoning · Images and charts · Long documents
Gemini 3 Pro is the stronger all-rounder.Gemini 3.1 Flash Lite Preview is cheaper and better at facts.
Scores updated · 28 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.
- CodingWriting and fixing software03Gemini 3 Pro3 of 3 tests
- ReasoningHard problems that need careful thinking03Gemini 3 Pro3 of 3 tests
- Images and chartsUnderstanding pictures, charts and video03Gemini 3 Pro3 of 3 tests
- AgentsCarrying out multi-step tasks on its own02Gemini 3 Pro2 of 2 tests
- Long documentsFinding answers in very long texts01Gemini 3 Pro1 of 1 test
- FactsGetting facts right instead of making them up21Gemini 3.1 Flash Lite Preview2 of 3 tests
- Following instructionsDoing exactly what it is asked11Even1 each
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.
Gemini 3.1 Flash Lite Preview costs 88% 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
- Very hard expert questions across many subjectsHumanity's Last Exam+22.5points ahead
- Answers hard knowledge questions correctlyAA-Omniscience · Accuracy+19.5points ahead
- Hard command-line tasks in a real terminalTerminal-Bench Hard+17.5points ahead
Where Gemini 3.1 Flash Lite Preview pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+8.8points ahead
- Follows unfamiliar, precisely checkable instructionsIFBench+6.8points ahead
Every test, side by side
All 28 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 185 rating points12541439+185 rating
- Terminal-Bench HardGemini 3 Pro by 17.524.241.7+17.5
- SciCodeGemini 3 Pro by 12.743.456.1+12.7
AgentsGemini 3 Pro
- GDPValGemini 3 Pro by 34.2034.2+34.2
- AA ApexAgentsGemini 3 Pro by 6.212.218.4+6.2
ReasoningGemini 3 Pro
- Humanity's Last ExamGemini 3 Pro by 22.517.239.7+22.5
- GPQA DiamondGemini 3 Pro by 8.682.290.8+8.6
- CritPtGemini 3 Pro by 81.19.1+8
FactsGemini 3.1 Flash Lite Preview
- AA-Omniscience · AccuracyGemini 3 Pro by 19.536.355.8+19.5
- AA-Omniscience · Non-hallucinationGemini 3.1 Flash Lite Preview by 8.817.38.5+8.8
- Vectara HHEM hallucination ratelower is betterGemini 3.1 Flash Lite Preview by 5.48.213.6+5.4
Images and chartsGemini 3 Pro
- CharXiv (RQ)Gemini 3 Pro by 8.273.281.4+8.2
- LMArena · VisionGemini 3 Pro by 65 rating points12401305+65 rating
- MMMU-ProGemini 3 Pro by 4.775.580.2+4.7
Following instructionsEven
- IFBenchGemini 3.1 Flash Lite Preview by 6.877.270.4+6.8
- Multi-ChallengeGemini 3 Pro by 5.160.665.7+5.1
Other results11 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.
- τ²-Bench Telecom (AA run)Gemini 3 Pro by 55.831.387.1+55.8
- AA Agentic IndexGemini 3 Pro by 48.83.252+48.8
- AA-OmniscienceGemini 3 Pro by 31.7-16.415.3+31.7
- SimpleQAGemini 3 Pro by 28.843.372.1+28.8
- AA IntelligenceGemini 3 Pro by 12.415.628+12.4
- Artificial Analysis Coding IndexGemini 3 Pro by 11.834.746.5+11.8
- vectara_factual_consistencyGemini 3.1 Flash Lite Preview by 5.491.886.4+5.4
- vectara_avg_summary_lengthGemini 3 Pro by 39.3 rating points62.6101.9+39.3 rating
- MMMLUGemini 3 Pro by 2.988.991.8+2.9
- VideoMMMUGemini 3 Pro by 2.884.887.6+2.8
- vectara_answer_ratetie99.699.4tie
Questions people ask
Which is better, Gemini 3.1 Flash Lite Preview or Gemini 3 Pro?
Gemini 3 Pro wins five of the seven areas where both have results: coding, agents, reasoning, images and charts and long documents. Gemini 3.1 Flash Lite Preview wins facts, and costs 88% less. They are level on following instructions.
Which is better for coding?
Gemini 3 Pro. It wins 3 of the 3 coding tests both models report; Gemini 3.1 Flash Lite Preview wins none.
Which is cheaper?
Gemini 3.1 Flash Lite Preview costs $0.25 per million input tokens and $1.50 per million output tokens; Gemini 3 Pro costs $2.00 and $12.00. That makes Gemini 3.1 Flash Lite Preview about 88% cheaper for the same work.
How do you compare the two?
We use the 28 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 11 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.