Devstral Small 2 vs Gemini 3.1 Pro
Wins 0 of 7 areas
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Wins 7 of 7 areas
Coding · Agents · Reasoning · Facts · Images and charts · Long documents · Following instructions
Gemini 3.1 Pro is the stronger all-rounder.
Scores updated · 22 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 software05Gemini 3.1 Pro5 of 5 tests
- AgentsCarrying out multi-step tasks on its own03Gemini 3.1 Pro3 of 3 tests
- ReasoningHard problems that need careful thinking03Gemini 3.1 Pro3 of 3 tests
- FactsGetting facts right instead of making them up02Gemini 3.1 Pro2 of 2 tests
- Images and chartsUnderstanding pictures, charts and video01Gemini 3.1 Pro1 of 1 test
- Long documentsFinding answers in very long texts01Gemini 3.1 Pro1 of 1 test
- Following instructionsDoing exactly what it is asked01Gemini 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.
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
- Reasons across sets of long documentsAA-LCR+54points ahead
- Follows unfamiliar, precisely checkable instructionsIFBench+45.9points ahead
- Command-line tasks in a real terminalTerminal-Bench 2.1+44.2points ahead
Where Devstral Small 2 pulls ahead
No clear win on a test scored out of 100.
Every test, side by side
All 22 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 44.229.673.8+44.2
- Terminal-Bench HardGemini 3.1 Pro by 37.116.753.8+37.1
- SciCodeGemini 3.1 Pro by 26.332.458.7+26.3
- SWE-bench MultilingualGemini 3.1 Pro by 21.255.776.9+21.2
- SWE-bench VerifiedGemini 3.1 Pro by 12.66880.6+12.6
AgentsGemini 3.1 Pro
- GDPValGemini 3.1 Pro by 13.11.614.7+13.1
- τ-Bench V3 · BankingGemini 3.1 Pro by 10.710.721.4+10.7
- Terminal-Bench 4.0Gemini 3.1 Pro by 404+4
ReasoningGemini 3.1 Pro
- Humanity's Last ExamGemini 3.1 Pro by 43.53.547+43.5
- GPQA DiamondGemini 3.1 Pro by 40.953.294.1+40.9
- CritPtGemini 3.1 Pro by 17.7017.7+17.7
FactsGemini 3.1 Pro
- AA-Omniscience · AccuracyGemini 3.1 Pro by 39.115.854.9+39.1
- AA-Omniscience · Non-hallucinationGemini 3.1 Pro by 36.412.749.1+36.4
Images and chartsGemini 3.1 Pro
- MMMU-ProGemini 3.1 Pro by 37.844.682.4+37.8
Following instructionsGemini 3.1 Pro
- IFBenchGemini 3.1 Pro by 45.931.277.1+45.9
Other results6 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 89.6-57.731.9+89.6
- τ²-Bench Telecom (AA run)Gemini 3.1 Pro by 72.223.495.6+72.2
- Terminal-Bench 2.0Gemini 3.1 Pro by 4622.568.5+46
- Artificial Analysis Coding IndexGemini 3.1 Pro by 39.529.368.8+39.5
- AA IntelligenceGemini 3.1 Pro by 22.27.529.7+22.2
- AA Agentic IndexGemini 3.1 Pro by 5.54.810.3+5.5
Questions people ask
Which is better, Devstral Small 2 or Gemini 3.1 Pro?
Gemini 3.1 Pro wins all seven areas where both have results: coding, agents, reasoning, facts, images and charts, long documents and following instructions. Devstral Small 2 wins none.
Which is better for coding?
Gemini 3.1 Pro. It wins 5 of the 5 coding tests both models report; Devstral Small 2 wins none.
How do you compare the two?
We use the 22 benchmark tests both models have published scores on. The verdict counts the 16 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 6 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.