DeepSeek-V4.1-Flash vs Gemini 3.1 Pro
Wins 4 of 8 areas
Coding · Agents · Math · Long documents
Wins 4 of 8 areas
Reasoning · Facts · Images and charts · Following instructions
The two are evenly matched.DeepSeek-V4.1-Flash is better at coding and agents; Gemini 3.1 Pro at facts and images and charts.
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.
- CodingWriting and fixing software41DeepSeek-V4.1-Flash4 of 5 tests
- AgentsCarrying out multi-step tasks on its own30DeepSeek-V4.1-Flash3 of 3 tests
- MathCompetition and research-level math30DeepSeek-V4.1-Flash3 of 3 tests
- Long documentsFinding answers in very long texts10DeepSeek-V4.1-Flash1 of 1 test
- FactsGetting facts right instead of making them up03Gemini 3.1 Pro3 of 3 tests
- Images and chartsUnderstanding pictures, charts and video03Gemini 3.1 Pro3 of 3 tests
- ReasoningHard problems that need careful thinking24Gemini 3.1 Pro4 of 7 tests · 1 tie
- Following instructionsDoing exactly what it is asked01Gemini 3.1 Pro1 of 1 test
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.
DeepSeek-V4.1-Flash costs 89% less for the same work.
The biggest differences
The three tests each model wins by the widest margin. Scores are out of 100.
Where DeepSeek-V4.1-Flash pulls ahead
- Real work tasks from 44 professionsGDPVal+40.4points ahead
- Fixes real GitHub issues, working as an agentLiveBench · Agentic Coding+33.2points ahead
- Complex command-line tasks across many fieldsTerminal-Bench 4.0+22.8points ahead
Where Gemini 3.1 Pro pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+45.6points ahead
- Short factual questions, answered correctlySimpleQA Verified+30.6points ahead
- Reasoning about charts from research papersCharXiv (RQ)+14.3points 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.
CodingDeepSeek-V4.1-Flash
- LiveBench · Agentic CodingDeepSeek-V4.1-Flash by 33.277.344.1+33.2
- LMArena · WebDevDeepSeek-V4.1-Flash by 172 rating points16191447+172 rating
- Terminal-Bench 2.1DeepSeek-V4.1-Flash by 16.890.673.8+16.8
- SciCodeGemini 3.1 Pro by 6.851.958.7+6.8
- LiveBench · CodingDeepSeek-V4.1-Flash by 3.58076.5+3.5
AgentsDeepSeek-V4.1-Flash
- GDPValDeepSeek-V4.1-Flash by 40.45514.6+40.4
- Terminal-Bench 4.0DeepSeek-V4.1-Flash by 22.826.84+22.8
- AA IT-Bench SREDeepSeek-V4.1-Flash by 16.646.930.3+16.6
ReasoningGemini 3.1 Pro
- SimpleBenchGemini 3.1 Pro by 12.966.779.6+12.9
- Humanity's Last ExamGemini 3.1 Pro by 7.839.247+7.8
- CritPtGemini 3.1 Pro by 3.414.317.7+3.4
- GPQA DiamondGemini 3.1 Pro by 3.290.994.1+3.2
- LiveBench · ReasoningDeepSeek-V4.1-Flash by 2.786.784+2.7
- ARC-AGI-2DeepSeek-V4.1-Flash by 178.177.1+1
- ARC-AGI-3tie0.90.4tie
FactsGemini 3.1 Pro
- AA-Omniscience · Non-hallucinationGemini 3.1 Pro by 45.63.549.1+45.6
- SimpleQA VerifiedGemini 3.1 Pro by 30.642.973.5+30.6
- AA-Omniscience · AccuracyGemini 3.1 Pro by 8.546.454.9+8.5
Images and chartsGemini 3.1 Pro
- CharXiv (RQ)Gemini 3.1 Pro by 14.36983.3+14.3
- MMMU-ProGemini 3.1 Pro by 5.47782.4+5.4
- LMArena · VisionGemini 3.1 Pro by 18 rating points12781296+18 rating
MathDeepSeek-V4.1-Flash
- FrontierMath Tier 4DeepSeek-V4.1-Flash by 19.546.326.8+19.5
- FrontierMath Tiers 1-3 (v2)DeepSeek-V4.1-Flash by 11.571.259.6+11.5
- LiveBench · MathematicsDeepSeek-V4.1-Flash by 2.393.391+2.3
Following instructionsGemini 3.1 Pro
- LiveBench · Instruction FollowingGemini 3.1 Pro by 9.17079.1+9.1
Other results14 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.
- DeepSWE 1.1DeepSeek-V4.1-Flash by 62.274.212+62.2
- CyberGymDeepSeek-V4.1-Flash by 49.388.138.8+49.3
- AA-OmniscienceGemini 3.1 Pro by 37.2-5.331.9+37.2
- BabyVisionDeepSeek-V4.1-Flash by 35.289.654.4+35.2
- NL2RepoDeepSeek-V4.1-Flash by 30.66433.4+30.6
- Program BenchGemini 3.1 Pro by 19.220.339.5+19.2
- HLE (with tools)DeepSeek-V4.1-Flash by 12.563.951.4+12.5
- AA IntelligenceDeepSeek-V4.1-Flash by 9.839.529.7+9.8
- vectara_factual_consistencyDeepSeek-V4.1-Flash by 6.295.889.6+6.2
- ARC-AGI-1Gemini 3.1 Pro by 4.593.598+4.5
- livebench_languageGemini 3.1 Pro by 4.281.285.4+4.2
- livebench_data_analysistie79.378.5tie
- vectara_answer_ratetie99.999.4tie
- vectara_avg_summary_lengthtie108.2107.7tie
Questions people ask
Which is better, DeepSeek-V4.1-Flash or Gemini 3.1 Pro?
DeepSeek-V4.1-Flash and Gemini 3.1 Pro each win four of the eight areas we test. DeepSeek-V4.1-Flash wins coding, agents, math and long documents; Gemini 3.1 Pro wins reasoning, facts, images and charts and following instructions. DeepSeek-V4.1-Flash costs 89% less.
Which is better for coding?
DeepSeek-V4.1-Flash. It wins 4 of the 5 coding tests both models report; Gemini 3.1 Pro wins 1.
Which is cheaper?
DeepSeek-V4.1-Flash costs $0.30 per million input tokens and $1.20 per million output tokens; Gemini 3.1 Pro costs $2.00 and $12.00. That makes DeepSeek-V4.1-Flash about 89% 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 26 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 14 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.