GLM-5.3-Flash vs GPT-5.6 Sol
Wins 1 of 8 areas
Images and charts
Wins 7 of 8 areas
Coding · Agents · Reasoning · Facts · Math · Long documents · Following instructions
GPT-5.6 Sol is the stronger all-rounder.GLM-5.3-Flash is cheaper and better at images and charts.
Scores updated · 37 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.
- ReasoningHard problems that need careful thinking05GPT-5.6 Sol5 of 5 tests
- CodingWriting and fixing software04GPT-5.6 Sol4 of 5 tests · 1 tie
- MathCompetition and research-level math03GPT-5.6 Sol3 of 3 tests
- AgentsCarrying out multi-step tasks on its own23GPT-5.6 Sol3 of 5 tests
- FactsGetting facts right instead of making them up12GPT-5.6 Sol2 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
- Images and chartsUnderstanding pictures, charts and video20GLM-5.3-Flash2 of 2 tests
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.
GLM-5.3-Flash costs 97% less for the same work.
The biggest differences
The three tests each model wins by the widest margin. Scores are out of 100.
Where GPT-5.6 Sol pulls ahead
- Completes tasks by operating a computer desktopOSWorld-Verified+68.2points ahead
- Extremely hard research-level math problemsFrontierMath Tier 4+65.9points ahead
- Short factual questions, answered correctlySimpleQA Verified+37.7points ahead
Where GLM-5.3-Flash pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+64.6points ahead
- Reasoning about charts from research papersCharXiv (RQ)+3.6points ahead
- Customer-service tasks in a simulated bankτ-Bench V3 · Banking+2.9points ahead
Every test, side by side
All 37 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingGPT-5.6 Sol
- SciCodeGPT-5.6 Sol by 5.551.657.1+5.5
- LiveBench · CodingGPT-5.6 Sol by 4.97983.9+4.9
- Terminal-Bench 2.1GPT-5.6 Sol by 3.784.388+3.7
- LMArena · WebDevGPT-5.6 Sol by 11 rating points16051616+11 rating
- LiveBench · Agentic Codingtie56.856.2tie
AgentsGPT-5.6 Sol
- OSWorld-VerifiedGPT-5.6 Sol by 68.214.883+68.2
- Terminal-Bench 4.0GPT-5.6 Sol by 7.132.839.9+7.1
- AA IT-Bench SREGPT-5.6 Sol by 551.256.2+5
- τ-Bench V3 · BankingGLM-5.3-Flash by 2.947.244.3+2.9
- GDPValGLM-5.3-Flash by 1.857.255.4+1.8
ReasoningGPT-5.6 Sol
- ARC-AGI-2GPT-5.6 Sol by 26.765.892.5+26.7
- CritPtGPT-5.6 Sol by 16.915.432.3+16.9
- LiveBench · ReasoningGPT-5.6 Sol by 14.177.691.7+14.1
- Humanity's Last ExamGPT-5.6 Sol by 9.639.949.5+9.6
- GPQA DiamondGPT-5.6 Sol by 2.991.294.1+2.9
FactsGPT-5.6 Sol
- AA-Omniscience · Non-hallucinationGLM-5.3-Flash by 64.672.47.8+64.6
- SimpleQA VerifiedGPT-5.6 Sol by 37.73269.7+37.7
- AA-Omniscience · AccuracyGPT-5.6 Sol by 31.927.559.4+31.9
Images and chartsGLM-5.3-Flash
- CharXiv (RQ)GLM-5.3-Flash by 3.689.485.8+3.6
- LMArena · VisionGLM-5.3-Flash by 15 rating points12961281+15 rating
MathGPT-5.6 Sol
- FrontierMath Tier 4GPT-5.6 Sol by 65.917.183+65.9
- FrontierMath Tiers 1-3 (v2)GPT-5.6 Sol by 33.355.889.1+33.3
- LiveBench · MathematicsGPT-5.6 Sol by 1581.296.2+15
Following instructionsGPT-5.6 Sol
- LiveBench · Instruction FollowingGPT-5.6 Sol by 19.152.871.8+19.1
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.
- Agents' Last ExamGPT-5.6 Sol by 26.426.352.7+26.4
- ToolathlonGLM-5.3-Flash by 20.478.458+20.4
- AA-OmniscienceGPT-5.6 Sol by 14.57.522+14.5
- livebench_languageGPT-5.6 Sol by 10.477.387.7+10.4
- DeepSWE 1.1GPT-5.6 Sol by 9.663.473+9.6
- Artificial Analysis Coding IndexGPT-5.6 Sol by 5.971.577.4+5.9
- ARC-AGI-1GPT-5.6 Sol by 5.59196.5+5.5
- AA IntelligenceGPT-5.6 Sol by 5.241.847+5.2
- livebench_data_analysisGPT-5.6 Sol by 3.476.479.8+3.4
- Artificial AnalysisGPT-5.6 Sol by 25759+2
- OfficeQA Protie62.463.2tie
- AA Agentic Indextie51.250.5tie
Questions people ask
Which is better, GLM-5.3-Flash or GPT-5.6 Sol?
GPT-5.6 Sol wins seven of the eight areas we test: coding, agents, reasoning, facts, math, long documents and following instructions. GLM-5.3-Flash wins images and charts, and costs 97% less.
Which is better for coding?
GPT-5.6 Sol. It wins 4 of the 5 coding tests both models report; GLM-5.3-Flash wins none, and 1 is a tie.
Which is cheaper?
GLM-5.3-Flash costs $0.15 per million input tokens and $0.50 per million output tokens; GPT-5.6 Sol costs $4.00 and $20.00. That makes GLM-5.3-Flash about 97% cheaper for the same work.
How do you compare the two?
We use the 37 benchmark tests both models have published scores on. The verdict counts the 25 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.