Gemini 3.1 Pro vs Step 3.7 Flash
Wins 8 of 8 areas
Coding · Agents · Reasoning · Facts · Images and charts · Math · Long documents · Following instructions
Wins 0 of 8 areas
—
Gemini 3.1 Pro is the stronger all-rounder.Step 3.7 Flash is cheaper.
Scores updated · 23 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 thinking30Gemini 3.1 Pro3 of 3 tests
- CodingWriting and fixing software31Gemini 3.1 Pro3 of 4 tests
- FactsGetting facts right instead of making them up20Gemini 3.1 Pro2 of 2 tests
- MathCompetition and research-level math20Gemini 3.1 Pro2 of 2 tests
- AgentsCarrying out multi-step tasks on its own21Gemini 3.1 Pro2 of 4 tests · 1 tie
- Images and chartsUnderstanding pictures, charts and video10Gemini 3.1 Pro1 of 1 test
- Long documentsFinding answers in very long texts10Gemini 3.1 Pro1 of 1 test
- Following instructionsDoing exactly what it is asked10Gemini 3.1 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.
Step 3.7 Flash costs 90% 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 3.1 Pro pulls ahead
- Command-line tasks in a real terminalTerminal-Bench 2.1+34.5points ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+34.1points ahead
- Answers hard knowledge questions correctlyAA-Omniscience · Accuracy+29.1points ahead
Where Step 3.7 Flash pulls ahead
- Real work tasks from 44 professionsGDPVal+3.3points ahead
- Long, multi-file coding tasks in real codebasesSWE-bench Pro+2.1points ahead
Every test, side by side
All 23 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingGemini 3.1 Pro
- Terminal-Bench 2.1Gemini 3.1 Pro by 34.573.839.3+34.5
- Terminal-Bench HardGemini 3.1 Pro by 18.253.835.6+18.2
- SciCodeGemini 3.1 Pro by 14.858.743.9+14.8
- SWE-bench ProStep 3.7 Flash by 2.154.256.3+2.1
AgentsGemini 3.1 Pro
- AA ApexAgentsGemini 3.1 Pro by 17.23214.8+17.2
- τ-Bench V3 · BankingGemini 3.1 Pro by 9.421.412+9.4
- GDPValStep 3.7 Flash by 3.314.718+3.3
- AA IT-Bench SREtie30.330.3tie
ReasoningGemini 3.1 Pro
- Humanity's Last ExamGemini 3.1 Pro by 25.64721.4+25.6
- CritPtGemini 3.1 Pro by 15.417.72.3+15.4
- GPQA DiamondGemini 3.1 Pro by 13.294.180.9+13.2
FactsGemini 3.1 Pro
- AA-Omniscience · Non-hallucinationGemini 3.1 Pro by 34.149.115+34.1
- AA-Omniscience · AccuracyGemini 3.1 Pro by 29.154.925.8+29.1
Images and chartsGemini 3.1 Pro
- MMMU-ProGemini 3.1 Pro by 7.182.475.3+7.1
MathGemini 3.1 Pro
- HMMT Feb. 2026Gemini 3.1 Pro by 6.894.787.9+6.8
- AIME 2026Gemini 3.1 Pro by 3.398.395+3.3
Following instructionsGemini 3.1 Pro
- IFBenchGemini 3.1 Pro by 9.877.167.3+9.8
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.
- AA-OmniscienceGemini 3.1 Pro by 69.231.9-37.3+69.2
- Artificial Analysis Coding IndexGemini 3.1 Pro by 29.268.839.6+29.2
- AA Agentic IndexStep 3.7 Flash by 11.410.321.7+11.4
- AA IntelligenceGemini 3.1 Pro by 10.229.719.5+10.2
- τ²-Bench Telecom (AA run)Step 3.7 Flash by 2.995.698.5+2.9
Questions people ask
Which is better, Gemini 3.1 Pro or Step 3.7 Flash?
Gemini 3.1 Pro wins all eight areas we test: coding, agents, reasoning, facts, images and charts, math, long documents and following instructions. Step 3.7 Flash wins none, but costs 90% less.
Which is better for coding?
Gemini 3.1 Pro. It wins 3 of the 4 coding tests both models report; Step 3.7 Flash wins 1.
Which is cheaper?
Gemini 3.1 Pro costs $2.00 per million input tokens and $12.00 per million output tokens; Step 3.7 Flash costs $0.20 and $1.15. That makes Step 3.7 Flash about 90% cheaper for the same work.
How do you compare the two?
We use the 23 benchmark tests both models have published scores on. The verdict counts the 18 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.