GLM-5.2 vs GPT-5.6 Luna
Wins 1 of 7 areas
Following instructions
Wins 6 of 7 areas
Coding · Agents · Reasoning · Facts · Math · Long documents
GPT-5.6 Luna is the stronger all-rounder.GLM-5.2 is better at following instructions.
Scores updated · 45 tests both models report · How we compare
Where each one wins
Tests won in each of the seven areas where both have results. 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 software23GPT-5.6 Luna3 of 6 tests · 1 tie
- ReasoningHard problems that need careful thinking23GPT-5.6 Luna3 of 6 tests · 1 tie
- AgentsCarrying out multi-step tasks on its own23GPT-5.6 Luna3 of 5 tests
- MathCompetition and research-level math23GPT-5.6 Luna3 of 5 tests
- FactsGetting facts right instead of making them up12GPT-5.6 Luna2 of 3 tests
- Long documentsFinding answers in very long texts01GPT-5.6 Luna1 of 1 test
- Following instructionsDoing exactly what it is asked10GLM-5.21 of 1 test
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.
GPT-5.6 Luna costs 76% 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 Luna pulls ahead
- Abstract visual puzzles that people can solveARC-AGI-2+36.8points ahead
- Extremely hard research-level math problemsFrontierMath Tier 4+29.2points ahead
- Unpublished advanced math problemsFrontierMath Tiers 1-3 (v2)+22.9points ahead
Where GLM-5.2 pulls ahead
- Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+66.3points ahead
- Common-sense trick questionsSimpleBench+12points ahead
- Customer-service tasks in a simulated bankτ-Bench V3 · Banking+3.5points ahead
Every test, side by side
All 45 tests both models report. The winning score is in its model's colour; marks a score checked independently.
CodingGPT-5.6 Luna
- LMArena · WebDevGLM-5.2 by 89 rating points16081519+89 rating
- LiveBench · Agentic CodingGLM-5.2 by 3.451.848.4+3.4
- LiveBench · CodingGPT-5.6 Luna by 3.279.782.9+3.2
- Terminal-Bench 2.1GPT-5.6 Luna by 377.980.9+3
- SciCodeGPT-5.6 Luna by 2.451.253.6+2.4
- SWE-bench Protie62.162.7tie
AgentsGPT-5.6 Luna
- Terminal-Bench 4.0GPT-5.6 Luna by 10.6111.6+10.6
- GDPValGPT-5.6 Luna by 4.443.648+4.4
- τ-Bench V3 · BankingGLM-5.2 by 3.534.631.1+3.5
- AA IT-Bench SREGLM-5.2 by 2.442.740.3+2.4
- AA ApexAgentsGPT-5.6 Luna by 2.133.735.8+2.1
ReasoningGPT-5.6 Luna
- ARC-AGI-2GPT-5.6 Luna by 36.822.859.6+36.8
- SimpleBenchGLM-5.2 by 1258.846.8+12
- LiveBench · ReasoningGPT-5.6 Luna by 778.685.6+7
- GPQA DiamondGPT-5.6 Luna by 1.689.591.1+1.6
- Humanity's Last ExamGLM-5.2 by 1.641.139.5+1.6
- CritPttie20.920.6tie
FactsGPT-5.6 Luna
- AA-Omniscience · Non-hallucinationGLM-5.2 by 66.373.77.4+66.3
- AA-Omniscience · AccuracyGPT-5.6 Luna by 18.424.342.7+18.4
- SimpleQA VerifiedGPT-5.6 Luna by 6.834.241+6.8
MathGPT-5.6 Luna
- FrontierMath Tier 4GPT-5.6 Luna by 29.229.358.5+29.2
- FrontierMath Tiers 1-3 (v2)GPT-5.6 Luna by 22.959.282.1+22.9
- HMMT Feb. 2026GPT-5.6 Luna by 692.598.5+6
- LiveBench · MathematicsGLM-5.2 by 2.689.887.2+2.6
- AIME 2026GLM-5.2 by 1.699.297.6+1.6
Following instructionsGLM-5.2
- LiveBench · Instruction FollowingGLM-5.2 by 2.262.360.1+2.2
Other results18 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 Luna by 26.523.850.3+26.5
- DeepSWE 1.1GPT-5.6 Luna by 234467+23
- DeepSWEGPT-5.6 Luna by 2146.267.2+21
- AA-OmniscienceGLM-5.2 by 14.74.4-10.3+14.7
- ARC-AGI-1GPT-5.6 Luna by 13.77790.7+13.7
- GDP (Surge AI)GPT-5.6 Luna by 12.310.422.7+12.3
- Toolathlon VerifiedGPT-5.6 Luna by 859.967.9+8
- GDPval-AA v2 EloGPT-5.6 Luna by 74 rating points15101584+74 rating
- HLE (with tools)GLM-5.2 by 5.854.748.9+5.8
- ToolathlonGPT-5.6 Luna by 5.248.253.4+5.2
- livebench_data_analysisGPT-5.6 Luna by 4.373.778+4.3
- AA IntelligenceGPT-5.6 Luna by 3.633.737.3+3.6
- livebench_languageGLM-5.2 by 3.676.272.6+3.6
- AA Agentic IndexGPT-5.6 Luna by 3.339.442.7+3.3
- Artificial Analysis Coding IndexGPT-5.6 Luna by 2.668.871.4+2.6
- τ³-Bench BankingGLM-5.2 by 2.526.824.3+2.5
- GDPval-AA v2GPT-5.6 Luna by 22 rating points15081530+22 rating
- SWEBench Pro Publictie62.162.7tie
Questions people ask
Which is better, GLM-5.2 or GPT-5.6 Luna?
GPT-5.6 Luna wins six of the seven areas where both have results: coding, agents, reasoning, facts, math and long documents. GLM-5.2 wins following instructions.
Which is better for coding?
GPT-5.6 Luna. It wins 3 of the 6 coding tests both models report; GLM-5.2 wins 2, and 1 is a tie.
Which is cheaper?
GLM-5.2 costs $1.40 per million input tokens and $4.40 per million output tokens; GPT-5.6 Luna costs $0.20 and $1.20. That makes GPT-5.6 Luna about 76% cheaper for the same work.
How do you compare the two?
We use the 45 benchmark tests both models have published scores on. The verdict counts the 27 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 18 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.