Gemini 3.5 Flash vs Gemini 3 Pro
Wins 6 of 8 areas
Coding · Agents · Reasoning · Images and charts · Math · Following instructions
Wins 2 of 8 areas
Facts · Long documents
Gemini 3.5 Flash is the stronger all-rounder.Gemini 3 Pro is better at long documents.
Scores updated · 40 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 3.5 Flash4 of 5 tests · 1 tie
- AgentsCarrying out multi-step tasks on its own30Gemini 3.5 Flash3 of 3 tests
- MathCompetition and research-level math20Gemini 3.5 Flash2 of 2 tests
- CodingWriting and fixing software21Gemini 3.5 Flash2 of 4 tests · 1 tie
- Images and chartsUnderstanding pictures, charts and video21Gemini 3.5 Flash2 of 4 tests · 1 tie
- Following instructionsDoing exactly what it is asked10Gemini 3.5 Flash1 of 1 test
- Long documentsFinding answers in very long texts02Gemini 3 Pro2 of 2 tests
- FactsGetting facts right instead of making them up12Gemini 3 Pro2 of 3 tests
Following instructions 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 3.5 Flash costs 25% less for the same work.
The biggest differences
The three tests each model wins by the widest margin. Scores are out of 100.
Where Gemini 3.5 Flash pulls ahead
- Abstract visual puzzles that people can solveARC-AGI-2+41points ahead
- Multi-step tasks using many real software toolsMCP Atlas+29.5points ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+29.3points ahead
Where Gemini 3 Pro pulls ahead
- Finds one of eight look-alike replies in a long chatMRCR v2 8 needle 128k (average)+50.4points ahead
- Short factual questions, answered correctlySimpleQA Verified+6.7points ahead
- Answers hard knowledge questions correctlyAA-Omniscience · Accuracy+4.4points ahead
Every test, side by side
All 40 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingGemini 3.5 Flash
- SWE-bench ProGemini 3.5 Flash by 11.855.143.3+11.8
- LMArena · WebDevGemini 3.5 Flash by 60 rating points14991439+60 rating
- SciCodeGemini 3 Pro by 2.253.956.1+2.2
- Terminal-Bench Hardtie40.941.7tie
AgentsGemini 3.5 Flash
- MCP AtlasGemini 3.5 Flash by 29.583.654.1+29.5
- AA ApexAgentsGemini 3.5 Flash by 28.747.118.4+28.7
- GDPValGemini 3.5 Flash by 135.234.2+1
ReasoningGemini 3.5 Flash
- ARC-AGI-2Gemini 3.5 Flash by 4172.131.1+41
- CritPtGemini 3.5 Flash by 413.19.1+4
- Humanity's Last ExamGemini 3.5 Flash by 342.739.7+3
- GPQA DiamondGemini 3.5 Flash by 1.492.290.8+1.4
- SimpleBenchtie76.776.4tie
FactsGemini 3 Pro
- AA-Omniscience · Non-hallucinationGemini 3.5 Flash by 29.337.88.5+29.3
- SimpleQA VerifiedGemini 3 Pro by 6.766.272.9+6.7
- AA-Omniscience · AccuracyGemini 3 Pro by 4.451.455.8+4.4
Images and chartsGemini 3.5 Flash
- MMMU-ProGemini 3.5 Flash by 4.184.380.2+4.1
- CharXiv (RQ)Gemini 3.5 Flash by 2.884.281.4+2.8
- Video-MMEGemini 3 Pro by 1.287.288.4+1.2
- LMArena · Visiontie13101305tie
MathGemini 3.5 Flash
- HMMT Feb. 2026Gemini 3.5 Flash by 9.195.586.4+9.1
- AIME 2026Gemini 3.5 Flash by 3.39591.7+3.3
Long documentsGemini 3 Pro
- MRCR v2 8 needle 128k (average)Gemini 3 Pro by 50.426.677+50.4
- AA-LCRGemini 3 Pro by 2.773.376+2.7
Following instructionsGemini 3.5 Flash
- IFBenchGemini 3.5 Flash by 5.976.370.4+5.9
Other results16 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.
- GDPval-AA (Elo)Gemini 3.5 Flash by 461 rating points16561195+461 rating
- AA Agentic IndexGemini 3 Pro by 24.727.352+24.7
- Artificial Analysis Coding IndexGemini 3.5 Flash by 23.670.146.5+23.6
- Terminal-Bench 2.0Gemini 3.5 Flash by 2276.254.2+22
- ToolathlonGemini 3.5 Flash by 20.156.536.4+20.1
- ARC-AGI-1Gemini 3.5 Flash by 17.592.575+17.5
- τ²-Bench Telecom (AA run)Gemini 3.5 Flash by 8.295.387.1+8.2
- AA-OmniscienceGemini 3.5 Flash by 5.921.215.3+5.9
- matharena_visual_math_overallGemini 3.5 Flash by 5.789.984.2+5.7
- AA IntelligenceGemini 3.5 Flash by 4.632.628+4.6
- frontiermath_tier_4_v1Gemini 3 Pro by 4.214.618.8+4.2
- mrcr_v2_8needle_1m_pointwiseGemini 3 Pro by 4.222.126.3+4.2
- LVBenchGemini 3.5 Flash by 2.876.373.5+2.8
- LiveBenchGemini 3.5 Flash by 1.67573.4+1.6
- MotionBenchtie70.670.3tie
- LongVideoBenchtie77.677.7tie
Questions people ask
Which is better, Gemini 3.5 Flash or Gemini 3 Pro?
Gemini 3.5 Flash wins six of the eight areas we test: coding, agents, reasoning, images and charts, math and following instructions. Gemini 3 Pro wins facts and long documents.
Which is better for coding?
Gemini 3.5 Flash. It wins 2 of the 4 coding tests both models report; Gemini 3 Pro wins 1, and 1 is a tie.
Which is cheaper?
Gemini 3.5 Flash costs $1.50 per million input tokens and $9.00 per million output tokens; Gemini 3 Pro costs $2.00 and $12.00. That makes Gemini 3.5 Flash about 25% cheaper for the same work.
How do you compare the two?
We use the 40 benchmark tests both models have published scores on. The verdict counts the 24 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 16 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.