GLM-5.3-Flash vs GPT-6.1 Sol
Wins 0 of 8 areas
—
Wins 6 of 8 areas
Coding · Reasoning · Facts · Math · Long documents · Following instructions
GPT-6.1 Sol is the stronger all-rounder.GLM-5.3-Flash is cheaper.
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.
- ReasoningHard problems that need careful thinking04GPT-6.1 Sol4 of 4 tests
- MathCompetition and research-level math03GPT-6.1 Sol3 of 3 tests
- CodingWriting and fixing software13GPT-6.1 Sol3 of 4 tests
- FactsGetting facts right instead of making them up12GPT-6.1 Sol2 of 3 tests
- Long documentsFinding answers in very long texts01GPT-6.1 Sol1 of 1 test
- Following instructionsDoing exactly what it is asked01GPT-6.1 Sol1 of 1 test
- AgentsCarrying out multi-step tasks on its own11Even1 each
- Images and chartsUnderstanding pictures, charts and video00Even0 each · 1 tie
Images and charts, 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 95% 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-6.1 Sol pulls ahead
- Extremely hard research-level math problemsFrontierMath Tier 4+82.9points ahead
- Short factual questions, answered correctlySimpleQA Verified+41.9points ahead
- Unpublished advanced math problemsFrontierMath Tiers 1-3 (v2)+37.9points ahead
Where GLM-5.3-Flash pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+26.7points ahead
- Real work tasks from 44 professionsGDPVal+2.5points ahead
- Fixes real GitHub issues, working as an agentLiveBench · Agentic Coding+2.2points 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-6.1 Sol
- LMArena · WebDevGPT-6.1 Sol by 134 rating points16091743+134 rating
- SciCodeGPT-6.1 Sol by 2.651.654.2+2.6
- LiveBench · Agentic CodingGLM-5.3-Flash by 2.256.854.5+2.2
- LiveBench · CodingGPT-6.1 Sol by 1.47980.4+1.4
AgentsEven
- Terminal-Bench 4.0GPT-6.1 Sol by 23.332.856.1+23.3
- GDPValGLM-5.3-Flash by 2.557.254.7+2.5
ReasoningGPT-6.1 Sol
- ARC-AGI-2GPT-6.1 Sol by 28.465.894.2+28.4
- CritPtGPT-6.1 Sol by 16.315.431.7+16.3
- LiveBench · ReasoningGPT-6.1 Sol by 1577.692.6+15
- Humanity's Last ExamGPT-6.1 Sol by 1339.952.9+13
FactsGPT-6.1 Sol
- SimpleQA VerifiedGPT-6.1 Sol by 41.93273.9+41.9
- AA-Omniscience · AccuracyGPT-6.1 Sol by 34.627.562.1+34.6
- AA-Omniscience · Non-hallucinationGLM-5.3-Flash by 26.772.445.7+26.7
MathGPT-6.1 Sol
- FrontierMath Tier 4GPT-6.1 Sol by 82.917.1100+82.9
- FrontierMath Tiers 1-3 (v2)GPT-6.1 Sol by 37.955.893.7+37.9
- LiveBench · MathematicsGPT-6.1 Sol by 15.681.296.8+15.6
Following instructionsGPT-6.1 Sol
- LiveBench · Instruction FollowingGPT-6.1 Sol by 21.452.874.2+21.4
Other results10 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.
- Terminal-Bench-Science 0.1GPT-6.1 Sol by 53.34.858.1+53.3
- CritPt v2 HardGPT-6.1 Sol by 4524.569.5+45
- HLE-DiamondGPT-6.1 Sol by 40.618.258.8+40.6
- AA-OmniscienceGPT-6.1 Sol by 347.541.5+34
- GDP (Surge AI)GPT-6.1 Sol by 15.615.431+15.6
- livebench_languageGPT-6.1 Sol by 12.877.390.1+12.8
- DeepSWE 1.1GPT-6.1 Sol by 11.863.475.2+11.8
- AA IntelligenceGPT-6.1 Sol by 1041.851.8+10
- livebench_data_analysisGPT-6.1 Sol by 6.376.482.7+6.3
- ARC-AGI-1GPT-6.1 Sol by 5.59196.5+5.5
Questions people ask
Which is better, GLM-5.3-Flash or GPT-6.1 Sol?
GPT-6.1 Sol wins six of the eight areas we test: coding, reasoning, facts, math, long documents and following instructions. GLM-5.3-Flash wins none, but costs 95% less. They are level on agents and images and charts.
Which is better for coding?
GPT-6.1 Sol. It wins 3 of the 4 coding tests both models report; GLM-5.3-Flash wins 1.
Which is cheaper?
GLM-5.3-Flash costs $0.15 per million input tokens and $0.50 per million output tokens; GPT-6.1 Sol costs $2.00 and $10.00. That makes GLM-5.3-Flash about 95% 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 19 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 10 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.