Model comparison
GLM-4.6V vs GPT-5.6 Luna
GPT-5.6 Luna is the stronger model overall, scoring 54.6 to 41.3 on the Noometry Index.
Last verified . 12 shared benchmarks.
Summary
- They share 12 benchmarks with published results for both. GLM-4.6V scores higher in 0 categories and GPT-5.6 Luna in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where GPT-5.6 Luna leads 58.5 to 38.0.
- Both cost about the same: $0.30 input and $0.90 output per million tokens.
- GPT-5.6 Luna accepts more context: 1.05M tokens versus 128K.
- GLM-4.6V has downloadable open weights; the other is API-only.
Side by side
| GLM-4.6V | GPT-5.6 Luna | |
|---|---|---|
| Provider | Z.ai (Zhipu) | OpenAI |
| Noometry Index | 41.3 | 54.6 |
| Released | 2025-12-08 | 2026-07-09 |
| Weights | Open | Proprietary |
| Context window | 128K | 1.05M |
| Max output | 33K | 128K |
| Input $ / M tokens | $0.30 | $0.20 |
| Output $ / M tokens | $0.90 | $1.20 |
| Results tracked | 12 | 52 |
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Category by category
Coding GPT-5.6 Luna leads
GLM-4.6V: 40.9 (#128), GPT-5.6 Luna: 54.5 (#28)
| Benchmark | GLM-4.6V | GPT-5.6 Luna |
|---|---|---|
| LMArena Coding | 1390 | 1466 |
| DeepSWE | — | 67.2% |
| FrontierCode | — | 39.8% |
| CursorBench | — | 35.9% |
| LMArena WebDev | — | 1519 |
| SciCode | — | 53.6% |
| WeirdML | — | 60.9% |
| ALE-Bench | — | 1,667 |
Agentic & Tool Use Not comparable
GLM-4.6V: —, GPT-5.6 Luna: 34.4 (#45)
| Benchmark | GLM-4.6V | GPT-5.6 Luna |
|---|---|---|
| APEX-Agents | — | 43% |
| BALROG | — | 45.6% |
| GDP.pdf | — | 22.7% |
| Vending-Bench 2 | — | 4,095 |
Reasoning GPT-5.6 Luna leads
GLM-4.6V: 27.6 (#115), GPT-5.6 Luna: 47.6 (#43)
| Benchmark | GLM-4.6V | GPT-5.6 Luna |
|---|---|---|
| LMArena Hard Prompts | 1368 | 1451 |
| ARC-AGI-2 | — | 59.5% |
| SimpleBench | — | 46.8% |
| Kagi LLM Benchmark | — | 49.1% |
| NYT Connections (extended) | — | 69.4% |
| ARC-AGI-1 | — | 88% |
| CritPt | — | 20.6% |
| Chess Puzzles | — | 40% |
| Mystery Game Puzzles | — | 21% |
| DTBench | — | 89.1% |
| LMCA | — | 48.5% |
| Surface Evolver Bench | — | 61.9% |
| Epoch Capabilities Index | — | 156.39 |
Math Not comparable
GLM-4.6V: —, GPT-5.6 Luna: 77.7 (#14)
| Benchmark | GLM-4.6V | GPT-5.6 Luna |
|---|---|---|
| FrontierMath (Tiers 1-3) | — | 82.1% |
| FrontierMath Tier 4 | — | 61% |
| OTIS Mock AIME 2024-2025 | — | 98.3% |
| ProofBench | — | 60% |
| LMArena Math | — | 1458 |
Knowledge GPT-5.6 Luna leads
GLM-4.6V: 38.0 (#149), GPT-5.6 Luna: 58.5 (#34)
| Benchmark | GLM-4.6V | GPT-5.6 Luna |
|---|---|---|
| LMArena Expert | 1371 | 1478 |
| GPQA Diamond | — | 91.6% |
| SimpleQA Verified | — | 41% |
Multimodal GPT-5.6 Luna leads
GLM-4.6V: 34.8 (#90), GPT-5.6 Luna: 42.7 (#28)
| Benchmark | GLM-4.6V | GPT-5.6 Luna |
|---|---|---|
| LMArena Vision | 1164 | 1258 |
| Blueprint-Bench 2 | — | 22.6% |
| Furniture Assembly | — | 42.5% |
| LMArena Document | — | 1457 |
Multilingual GPT-5.6 Luna leads
GLM-4.6V: 48.6 (#141), GPT-5.6 Luna: 52.8 (#78)
| Benchmark | GLM-4.6V | GPT-5.6 Luna |
|---|---|---|
| LMArena Non-English | 1359 | 1417 |
| LMArena Chinese | 1425 | 1470 |
| LMArena Russian | 1340 | 1428 |
| LMArena French | — | 1456 |
| LMArena German | — | 1454 |
| LMArena Japanese | — | 1411 |
| LMArena Korean | — | 1415 |
| LMArena Spanish | — | 1448 |
Instruction Following GPT-5.6 Luna leads
GLM-4.6V: 71.4 (#151), GPT-5.6 Luna: 75.6 (#57)
| Benchmark | GLM-4.6V | GPT-5.6 Luna |
|---|---|---|
| LMArena Instruction Following | 1352 | 1437 |
Long Context GPT-5.6 Luna leads
GLM-4.6V: 41.3 (#143), GPT-5.6 Luna: 43.9 (#82)
| Benchmark | GLM-4.6V | GPT-5.6 Luna |
|---|---|---|
| LMArena Longer Query | 1358 | 1436 |
Writing & Preference GPT-5.6 Luna leads
GLM-4.6V: 56.6 (#137), GPT-5.6 Luna: 68.0 (#29)
| Benchmark | GLM-4.6V | GPT-5.6 Luna |
|---|---|---|
| LMArena Text | 1377 | 1431 |
| LMArena Creative Writing | 1347 | 1396 |
| LMArena Multi-Turn | 1360 | 1434 |
| EQ-Bench Creative Writing | — | 1829 |
| EQ-Bench 4 | — | 1156 |
Frequently asked questions
Is GLM-4.6V better than GPT-5.6 Luna?
GPT-5.6 Luna is the stronger model overall, scoring 54.6 to 41.3 on the Noometry Index.
Which is cheaper, GLM-4.6V or GPT-5.6 Luna?
GLM-4.6V is cheaper. It lists at $0.30 per million input tokens and $0.90 per million output tokens; GPT-5.6 Luna lists at $0.20 and $1.20.
Is GLM-4.6V or GPT-5.6 Luna better for coding?
GPT-5.6 Luna scores higher on coding benchmarks: 54.5 versus 40.9 in the Noometry coding category.
Which has the bigger context window?
GPT-5.6 Luna does, with 1.05M tokens against 128K.
How many benchmarks do GLM-4.6V and GPT-5.6 Luna share?
12 benchmarks have published results for both models. GLM-4.6V has 12 scored results on Noometry and GPT-5.6 Luna has 52.