GPT-5.4 nano vs GPT-5.6 Sol
Wins 0 of 8 areas
—
Wins 6 of 8 areas
Coding · Agents · Reasoning · Images and charts · Math · Long documents
GPT-5.6 Sol is the stronger all-rounder.GPT-5.4 nano is cheaper.
Scores updated · 42 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.
- AgentsCarrying out multi-step tasks on its own07GPT-5.6 Sol7 of 7 tests
- CodingWriting and fixing software06GPT-5.6 Sol6 of 6 tests
- ReasoningHard problems that need careful thinking05GPT-5.6 Sol5 of 5 tests
- MathCompetition and research-level math03GPT-5.6 Sol3 of 3 tests
- Images and chartsUnderstanding pictures, charts and video02GPT-5.6 Sol2 of 2 tests
- Long documentsFinding answers in very long texts01GPT-5.6 Sol1 of 1 test
- FactsGetting facts right instead of making them up22Even2 each
- Following instructionsDoing exactly what it is asked11Even1 each
Long documents rests on a single test.
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.
GPT-5.4 nano costs 94% 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+86.8points ahead
- Extremely hard research-level math problemsFrontierMath Tier 4+70.8points ahead
- Short factual questions, answered correctlySimpleQA Verified+58points ahead
Where GPT-5.4 nano pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+18points ahead
- Follows unfamiliar, precisely checkable instructionsIFBench+3.2points ahead
Every test, side by side
All 42 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 27.360.788+27.3
- Terminal-Bench HardGPT-5.6 Sol by 23.542.465.9+23.5
- LiveBench · CodingGPT-5.6 Sol by 13.170.883.9+13.1
- SWE-bench ProGPT-5.6 Sol by 12.252.464.6+12.2
- SciCodeGPT-5.6 Sol by 9.947.257.1+9.9
- LiveBench · Agentic CodingGPT-5.6 Sol by 9.446.856.2+9.4
AgentsGPT-5.6 Sol
- OSWorld-VerifiedGPT-5.6 Sol by 443983+44
- Terminal-Bench 4.0GPT-5.6 Sol by 39.40.539.9+39.4
- GDPValGPT-5.6 Sol by 33.122.555.6+33.1
- AA IT-Bench SREGPT-5.6 Sol by 31.824.456.2+31.8
- MCP AtlasGPT-5.6 Sol by 27.556.183.6+27.5
- τ-Bench V3 · BankingGPT-5.6 Sol by 16.927.444.3+16.9
- AA ApexAgentsGPT-5.6 Sol by 1524.939.9+15
ReasoningGPT-5.6 Sol
- ARC-AGI-2GPT-5.6 Sol by 86.85.792.5+86.8
- CritPtGPT-5.6 Sol by 239.332.3+23
- Humanity's Last ExamGPT-5.6 Sol by 21.228.349.5+21.2
- GPQA DiamondGPT-5.6 Sol by 12.481.794.1+12.4
- LiveBench · ReasoningGPT-5.6 Sol by 10.681.191.7+10.6
FactsEven
- SimpleQA VerifiedGPT-5.6 Sol by 5811.769.7+58
- AA-Omniscience · AccuracyGPT-5.6 Sol by 33.725.759.4+33.7
- AA-Omniscience · Non-hallucinationGPT-5.4 nano by 1825.87.8+18
- Vectara HHEM hallucination ratelower is betterGPT-5.4 nano by 9.33.112.4+9.3
Images and chartsGPT-5.6 Sol
- MMMU-ProGPT-5.6 Sol by 1865.483.4+18
- LMArena · VisionGPT-5.6 Sol by 83 rating points11961279+83 rating
MathGPT-5.6 Sol
- FrontierMath Tier 4GPT-5.6 Sol by 70.812.283+70.8
- FrontierMath Tiers 1-3 (v2)GPT-5.6 Sol by 44.244.989.1+44.2
- LiveBench · MathematicsGPT-5.6 Sol by 5.29196.2+5.2
Following instructionsEven
- LiveBench · Instruction FollowingGPT-5.6 Sol by 4.767.271.8+4.7
- IFBenchGPT-5.4 nano by 3.275.972.7+3.2
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.
- AA-OmniscienceGPT-5.6 Sol by 51.5-29.522+51.5
- ARC-AGI-1GPT-5.6 Sol by 4551.596.5+45
- AA Agentic IndexGPT-5.6 Sol by 32.817.750.5+32.8
- AA IntelligenceGPT-5.6 Sol by 26.320.747+26.3
- livebench_languageGPT-5.6 Sol by 25.262.587.7+25.2
- ToolathlonGPT-5.6 Sol by 22.535.558+22.5
- Artificial Analysis Coding IndexGPT-5.6 Sol by 21.356.177.4+21.3
- livebench_data_analysisGPT-5.6 Sol by 12.267.679.8+12.2
- vectara_factual_consistencyGPT-5.4 nano by 9.396.987.6+9.3
- τ²-Bench Telecom (AA run)GPT-5.6 Sol by 9.17685.1+9.1
- vectara_avg_summary_lengthGPT-5.4 nano by 13.3 rating points144.4131.1+13.3 rating
- vectara_answer_ratetie10099.1tie
Questions people ask
Which is better, GPT-5.4 nano 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. GPT-5.4 nano wins none, but costs 94% less. They are level on facts and following instructions.
Which is better for coding?
GPT-5.6 Sol. It wins 6 of the 6 coding tests both models report; GPT-5.4 nano wins none.
Which is cheaper?
GPT-5.4 nano costs $0.20 per million input tokens and $1.25 per million output tokens; GPT-5.6 Sol costs $4.00 and $20.00. That makes GPT-5.4 nano about 94% cheaper for the same work.
How do you compare the two?
We use the 42 benchmark tests both models have published scores on. The verdict counts the 30 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.