Gemma 4 31B vs GPT-5.6 Sol
Wins 1 of 8 areas
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.Gemma 4 31B is cheaper and better at following instructions.
Scores updated · 32 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 software05GPT-5.6 Sol5 of 5 tests
- AgentsCarrying out multi-step tasks on its own05GPT-5.6 Sol5 of 5 tests
- ReasoningHard problems that need careful thinking03GPT-5.6 Sol3 of 3 tests
- Images and chartsUnderstanding pictures, charts and video02GPT-5.6 Sol2 of 3 tests · 1 tie
- MathCompetition and research-level math01GPT-5.6 Sol1 of 1 test
- Long documentsFinding answers in very long texts01GPT-5.6 Sol1 of 1 test
- Following instructionsDoing exactly what it is asked10Gemma 4 31B1 of 1 test
- FactsGetting facts right instead of making them up22Even2 each
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.
Gemma 4 31B costs 98% 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
- Short factual questions, answered correctlySimpleQA Verified+59.3points ahead
- Real work tasks from 44 professionsGDPVal+49.5points ahead
- Command-line tasks in a real terminalTerminal-Bench 2.1+44.6points ahead
Where Gemma 4 31B pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+7.2points ahead
- Follows unfamiliar, precisely checkable instructionsIFBench+2.9points ahead
Every test, side by side
All 32 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 44.643.488+44.6
- Terminal-Bench HardGPT-5.6 Sol by 29.536.465.9+29.5
- SWE-bench ProGPT-5.6 Sol by 28.935.764.6+28.9
- LMArena · WebDevGPT-5.6 Sol by 253 rating points13651618+253 rating
- SciCodeGPT-5.6 Sol by 11.645.557.1+11.6
AgentsGPT-5.6 Sol
- GDPValGPT-5.6 Sol by 49.56.155.6+49.5
- Terminal-Bench 4.0GPT-5.6 Sol by 39.9039.9+39.9
- τ-Bench V3 · BankingGPT-5.6 Sol by 29.514.844.3+29.5
- MCP AtlasGPT-5.6 Sol by 26.457.283.6+26.4
- AA IT-Bench SREGPT-5.6 Sol by 18.937.356.2+18.9
ReasoningGPT-5.6 Sol
- CritPtGPT-5.6 Sol by 30.91.432.3+30.9
- Humanity's Last ExamGPT-5.6 Sol by 25.923.649.5+25.9
- GPQA DiamondGPT-5.6 Sol by 8.485.794.1+8.4
FactsEven
- SimpleQA VerifiedGPT-5.6 Sol by 59.310.469.7+59.3
- AA-Omniscience · AccuracyGPT-5.6 Sol by 39.42059.4+39.4
- AA-Omniscience · Non-hallucinationGemma 4 31B by 7.2157.8+7.2
- Vectara HHEM hallucination ratelower is betterGemma 4 31B by 57.412.4+5
Images and chartsGPT-5.6 Sol
- CharXiv (RQ)GPT-5.6 Sol by 17.967.985.8+17.9
- MMMU-ProGPT-5.6 Sol by 1073.483.4+10
- LMArena · Visiontie12771279tie
Following instructionsGemma 4 31B
- IFBenchGemma 4 31B by 2.975.672.7+2.9
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.
- AA-OmniscienceGPT-5.6 Sol by 69.9-47.922+69.9
- AA Agentic IndexGPT-5.6 Sol by 43.86.750.5+43.8
- HLE (with tools)GPT-5.6 Sol by 3826.564.5+38
- Artificial Analysis Coding IndexGPT-5.6 Sol by 3443.477.4+34
- AA IntelligenceGPT-5.6 Sol by 32.314.747+32.3
- τ²-Bench Telecom (AA run)GPT-5.6 Sol by 25.259.985.1+25.2
- vectara_avg_summary_lengthGPT-5.6 Sol by 55.3 rating points75.8131.1+55.3 rating
- vectara_factual_consistencyGemma 4 31B by 592.687.6+5
- vectara_answer_ratetie10099.1tie
Questions people ask
Which is better, Gemma 4 31B 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. Gemma 4 31B wins following instructions, and costs 98% less. They are level on facts.
Which is better for coding?
GPT-5.6 Sol. It wins 5 of the 5 coding tests both models report; Gemma 4 31B wins none.
Which is cheaper?
Gemma 4 31B costs $0.17 per million input tokens and $0.40 per million output tokens; GPT-5.6 Sol costs $4.00 and $20.00. That makes Gemma 4 31B about 98% cheaper for the same work.
How do you compare the two?
We use the 32 benchmark tests both models have published scores on. The verdict counts the 23 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.