Gemini 3.5 Flash Lite vs GPT-5.6 Sol
Wins 0 of 8 areas
—
Wins 7 of 8 areas
Coding · Agents · Reasoning · Images and charts · Math · Long documents · Following instructions
GPT-5.6 Sol is the stronger all-rounder.Gemini 3.5 Flash Lite is cheaper.
Scores updated · 38 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 software06GPT-5.6 Sol6 of 6 tests
- ReasoningHard problems that need careful thinking05GPT-5.6 Sol5 of 5 tests
- AgentsCarrying out multi-step tasks on its own04GPT-5.6 Sol4 of 4 tests
- MathCompetition and research-level math04GPT-5.6 Sol4 of 4 tests
- Images and chartsUnderstanding pictures, charts and video03GPT-5.6 Sol3 of 3 tests
- Long documentsFinding answers in very long texts01GPT-5.6 Sol1 of 1 test
- Following instructionsDoing exactly what it is asked01GPT-5.6 Sol1 of 1 test
- FactsGetting facts right instead of making them up11Even1 each
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 3.5 Flash Lite costs 88% 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
- Abstract visual puzzles that people can solveARC-AGI-2+82.2points ahead
- Unpublished advanced math problemsFrontierMath Tiers 1-3 (v2)+63.1points ahead
- Complex command-line tasks across many fieldsTerminal-Bench 4.0+38.9points ahead
Where Gemini 3.5 Flash Lite pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+57.8points ahead
Every test, side by side
All 38 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 34.453.688+34.4
- LMArena · WebDevGPT-5.6 Sol by 178 rating points14401618+178 rating
- SciCodeGPT-5.6 Sol by 15.841.357.1+15.8
- LiveBench · Agentic CodingGPT-5.6 Sol by 10.945.356.2+10.9
- SWE-bench ProGPT-5.6 Sol by 10.454.264.6+10.4
- LiveBench · CodingGPT-5.6 Sol by 7.876.183.9+7.8
AgentsGPT-5.6 Sol
- Terminal-Bench 4.0GPT-5.6 Sol by 38.9139.9+38.9
- GDPValGPT-5.6 Sol by 31.324.355.6+31.3
- τ-Bench V3 · BankingGPT-5.6 Sol by 26.817.544.3+26.8
- OSWorld-VerifiedGPT-5.6 Sol by 97483+9
ReasoningGPT-5.6 Sol
- ARC-AGI-2GPT-5.6 Sol by 82.210.392.5+82.2
- CritPtGPT-5.6 Sol by 32.3032.3+32.3
- LiveBench · ReasoningGPT-5.6 Sol by 31.560.291.7+31.5
- Humanity's Last ExamGPT-5.6 Sol by 30.718.849.5+30.7
- GPQA DiamondGPT-5.6 Sol by 10.383.894.1+10.3
FactsEven
- AA-Omniscience · Non-hallucinationGemini 3.5 Flash Lite by 57.865.67.8+57.8
- AA-Omniscience · AccuracyGPT-5.6 Sol by 29.929.559.4+29.9
Images and chartsGPT-5.6 Sol
- CharXiv (RQ)GPT-5.6 Sol by 9.376.585.8+9.3
- MMMU-ProGPT-5.6 Sol by 4.47983.4+4.4
- LMArena · VisionGPT-5.6 Sol by 13 rating points12661279+13 rating
MathGPT-5.6 Sol
- FrontierMath Tier 4GPT-5.6 Sol by 83083+83
- FrontierMath Tiers 1-3 (v2)GPT-5.6 Sol by 63.12689.1+63.1
- LiveBench · MathematicsGPT-5.6 Sol by 22.573.796.2+22.5
- AIME 2026GPT-5.6 Sol by 17.782.299.9+17.7
Following instructionsGPT-5.6 Sol
- LiveBench · Instruction FollowingGPT-5.6 Sol by 4.767.271.8+4.7
Other results12 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 571 rating points11401711+571 rating
- ARC-AGI-1GPT-5.6 Sol by 4353.596.5+43
- AA Agentic IndexGPT-5.6 Sol by 34.615.950.5+34.6
- Artificial Analysis Coding IndexGPT-5.6 Sol by 28.149.377.4+28.1
- livebench_data_analysisGPT-5.6 Sol by 26.553.379.8+26.5
- AA IntelligenceGPT-5.6 Sol by 24.822.247+24.8
- HLE (with tools)GPT-5.6 Sol by 2242.564.5+22
- Toolathlon VerifiedGPT-5.6 Sol by 17.857.174.9+17.8
- AA-OmniscienceGPT-5.6 Sol by 16.85.222+16.8
- τ³-Bench BankingGPT-5.6 Sol by 16.516.533+16.5
- livebench_languageGPT-5.6 Sol by 15.971.887.7+15.9
- SWEBench Pro PublicGPT-5.6 Sol by 10.454.264.6+10.4
Questions people ask
Which is better, Gemini 3.5 Flash Lite or GPT-5.6 Sol?
GPT-5.6 Sol wins seven of the eight areas we test: coding, agents, reasoning, images and charts, math, long documents and following instructions. Gemini 3.5 Flash Lite wins none, but costs 88% less. They are level on facts.
Which is better for coding?
GPT-5.6 Sol. It wins 6 of the 6 coding tests both models report; Gemini 3.5 Flash Lite wins none.
Which is cheaper?
Gemini 3.5 Flash Lite costs $0.30 per million input tokens and $2.50 per million output tokens; GPT-5.6 Sol costs $4.00 and $20.00. That makes Gemini 3.5 Flash Lite about 88% cheaper for the same work.
How do you compare the two?
We use the 38 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 12 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.