Gemini 3.1 Flash Lite Preview vs GPT-5.6 Sol
Wins 2 of 8 areas
Facts · Following instructions
Wins 6 of 8 areas
Coding · Agents · Reasoning · Images and charts · Math · Long documents
GPT-5.6 Sol is the stronger all-rounder.Gemini 3.1 Flash Lite Preview is cheaper and better at facts.
Scores updated · 29 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 software04GPT-5.6 Sol4 of 4 tests
- AgentsCarrying out multi-step tasks on its own04GPT-5.6 Sol4 of 4 tests
- ReasoningHard problems that need careful thinking03GPT-5.6 Sol3 of 3 tests
- Images and chartsUnderstanding pictures, charts and video03GPT-5.6 Sol3 of 3 tests
- MathCompetition and research-level math01GPT-5.6 Sol1 of 1 test
- Long documentsFinding answers in very long texts01GPT-5.6 Sol1 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 asked10Gemini 3.1 Flash Lite Preview1 of 1 test
Math, 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.
Gemini 3.1 Flash Lite Preview costs 93% 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 GPT-5.6 Sol pulls ahead
- Unpublished advanced math problemsFrontierMath Tiers 1-3 (v2)+61.4points ahead
- Command-line tasks in a real terminalTerminal-Bench 2.1+56.9points ahead
- Hard command-line tasks in a real terminalTerminal-Bench Hard+41.7points ahead
Where Gemini 3.1 Flash Lite Preview pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+9.5points ahead
- Follows unfamiliar, precisely checkable instructionsIFBench+4.5points ahead
Every test, side by side
All 29 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingGPT-5.6 Sol
- Terminal-Bench 2.1GPT-5.6 Sol by 56.931.188+56.9
- Terminal-Bench HardGPT-5.6 Sol by 41.724.265.9+41.7
- LMArena · WebDevGPT-5.6 Sol by 364 rating points12541618+364 rating
- SciCodeGPT-5.6 Sol by 13.743.457.1+13.7
AgentsGPT-5.6 Sol
- GDPValGPT-5.6 Sol by 55.6055.6+55.6
- Terminal-Bench 4.0GPT-5.6 Sol by 39.40.539.9+39.4
- τ-Bench V3 · BankingGPT-5.6 Sol by 34.69.744.3+34.6
- AA ApexAgentsGPT-5.6 Sol by 27.712.239.9+27.7
ReasoningGPT-5.6 Sol
- Humanity's Last ExamGPT-5.6 Sol by 32.317.249.5+32.3
- CritPtGPT-5.6 Sol by 31.21.132.3+31.2
- GPQA DiamondGPT-5.6 Sol by 11.982.294.1+11.9
FactsGemini 3.1 Flash Lite Preview
- AA-Omniscience · AccuracyGPT-5.6 Sol by 23.136.359.4+23.1
- AA-Omniscience · Non-hallucinationGemini 3.1 Flash Lite Preview by 9.517.37.8+9.5
- Vectara HHEM hallucination ratelower is betterGemini 3.1 Flash Lite Preview by 4.28.212.4+4.2
Images and chartsGPT-5.6 Sol
- CharXiv (RQ)GPT-5.6 Sol by 12.673.285.8+12.6
- MMMU-ProGPT-5.6 Sol by 7.975.583.4+7.9
- LMArena · VisionGPT-5.6 Sol by 39 rating points12401279+39 rating
Following instructionsGemini 3.1 Flash Lite Preview
- IFBenchGemini 3.1 Flash Lite Preview by 4.577.272.7+4.5
Other results9 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 v2GPT-5.6 Sol by 1069 rating points6421711+1069 rating
- τ²-Bench Telecom (AA run)GPT-5.6 Sol by 53.831.385.1+53.8
- AA Agentic IndexGPT-5.6 Sol by 47.33.250.5+47.3
- Artificial Analysis Coding IndexGPT-5.6 Sol by 42.734.777.4+42.7
- AA-OmniscienceGPT-5.6 Sol by 38.4-16.422+38.4
- AA IntelligenceGPT-5.6 Sol by 31.415.647+31.4
- vectara_avg_summary_lengthGPT-5.6 Sol by 68.5 rating points62.6131.1+68.5 rating
- vectara_factual_consistencyGemini 3.1 Flash Lite Preview by 4.291.887.6+4.2
- vectara_answer_ratetie99.699.1tie
Questions people ask
Which is better, Gemini 3.1 Flash Lite Preview or GPT-5.6 Sol?
GPT-5.6 Sol wins six of the eight areas we test: coding, agents, reasoning, images and charts, math and long documents. Gemini 3.1 Flash Lite Preview wins facts and following instructions, and costs 93% less.
Which is better for coding?
GPT-5.6 Sol. It wins 4 of the 4 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; GPT-5.6 Sol costs $4.00 and $20.00. That makes Gemini 3.1 Flash Lite Preview about 93% cheaper for the same work.
How do you compare the two?
We use the 29 benchmark tests both models have published scores on. The verdict counts the 20 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 9 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.