Model comparison
GLM-5.2 vs GPT-5.5 Instant
GLM-5.2 is the stronger model overall, scoring 51.1 to 42.7 on the Noometry Index.
Last verified . 25 shared benchmarks.
Summary
- They share 25 benchmarks with published results for both. GLM-5.2 scores higher in 8 categories and GPT-5.5 Instant in 0 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in math, where GLM-5.2 leads 55.7 to 26.5.
- The biggest single-benchmark swing is FrontierMath (Tiers 1-3): 59.2% for GLM-5.2 and 26.3% for GPT-5.5 Instant.
- GLM-5.2 has downloadable open weights; the other is API-only.
Side by side
| GLM-5.2 | GPT-5.5 Instant | |
|---|---|---|
| Provider | Z.ai (Zhipu) | OpenAI |
| Noometry Index | 51.1 | 42.7 |
| Released | 2026-06-13 | 2026-05-05 |
| Weights | Open | Proprietary |
| Context window | 1M | — |
| Max output | 131K | — |
| Input $ / M tokens | $1.40 | — |
| Output $ / M tokens | $4.40 | — |
| Results tracked | 51 | 27 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding GLM-5.2 leads
GLM-5.2: 51.3 (#41), GPT-5.5 Instant: 44.3 (#74)
| Benchmark | GLM-5.2 | GPT-5.5 Instant |
|---|---|---|
| SciCode | 50.5% | 48.6% |
| LMArena Coding | 1485 | 1433 |
| SWE-bench Verified | 78.7% | — |
| DeepSWE | 43.8% | — |
| FrontierCode | 24.5% | — |
| LMArena WebDev | 1603 | — |
| WeirdML | 70.1% | — |
| ALE-Bench | 1,047 | — |
Agentic & Tool Use Not comparable
GLM-5.2: 32.4 (#63), GPT-5.5 Instant: —
| Benchmark | GLM-5.2 | GPT-5.5 Instant |
|---|---|---|
| APEX-Agents | 45.2% | — |
| τ²-bench Banking | 37.1% | — |
| PostTrainBench | 31.7% | — |
| GBAEval | 0% | — |
| Vending-Bench 2 | 8,314 | — |
Reasoning GLM-5.2 leads
GLM-5.2: 42.3 (#52), GPT-5.5 Instant: 24.9 (#155)
| Benchmark | GLM-5.2 | GPT-5.5 Instant |
|---|---|---|
| CritPt | 20.9% | 0% |
| Chess Puzzles | 21% | 12% |
| LMArena Hard Prompts | 1480 | 1426 |
| Epoch Capabilities Index | 151.78 | 142.52 |
| ARC-AGI-2 | 22.8% | — |
| SimpleBench | 58.8% | — |
| Kagi LLM Benchmark | 62.6% | — |
| NYT Connections (extended) | 74.3% | — |
| ARC-AGI-1 | 77% | — |
| EBR-Bench | 9.5% | — |
| Mystery Game Puzzles | 19% | — |
| DTBench | 93.6% | — |
| LMCA | 45.8% | — |
| Surface Evolver Bench | 55.6% | — |
Math GLM-5.2 leads
GLM-5.2: 55.7 (#43), GPT-5.5 Instant: 26.5 (#259)
| Benchmark | GLM-5.2 | GPT-5.5 Instant |
|---|---|---|
| FrontierMath (Tiers 1-3) | 59.2% | 26.3% |
| FrontierMath Tier 4 | 29.3% | 2.4% |
| OTIS Mock AIME 2024-2025 | 86.4% | 68.1% |
| LMArena Math | 1482 | 1420 |
| MathArena Final-Answer Competitions | 67.6% | — |
| ProofBench | 35% | — |
Knowledge GLM-5.2 leads
GLM-5.2: 57.1 (#40), GPT-5.5 Instant: 48.9 (#74)
| Benchmark | GLM-5.2 | GPT-5.5 Instant |
|---|---|---|
| GPQA Diamond | 91.9% | 82.5% |
| LMArena Expert | 1486 | 1409 |
| SimpleQA Verified | 34.2% | — |
Multimodal Not comparable
GLM-5.2: —, GPT-5.5 Instant: 40.0 (#52)
| Benchmark | GLM-5.2 | GPT-5.5 Instant |
|---|---|---|
| LMArena Vision | — | 1250 |
| LMArena Document | — | 1403 |
Multilingual GLM-5.2 leads
GLM-5.2: 55.8 (#26), GPT-5.5 Instant: 52.8 (#80)
| Benchmark | GLM-5.2 | GPT-5.5 Instant |
|---|---|---|
| LMArena Non-English | 1459 | 1417 |
| LMArena Chinese | 1519 | 1456 |
| LMArena French | 1479 | 1428 |
| LMArena German | 1468 | 1411 |
| LMArena Japanese | 1451 | 1408 |
| LMArena Korean | 1445 | 1392 |
| LMArena Russian | 1466 | 1431 |
| LMArena Spanish | 1477 | 1429 |
Instruction Following GLM-5.2 leads
GLM-5.2: 76.9 (#34), GPT-5.5 Instant: 74.2 (#100)
| Benchmark | GLM-5.2 | GPT-5.5 Instant |
|---|---|---|
| LMArena Instruction Following | 1465 | 1406 |
Long Context GLM-5.2 leads
GLM-5.2: 45.3 (#43), GPT-5.5 Instant: 43.4 (#96)
| Benchmark | GLM-5.2 | GPT-5.5 Instant |
|---|---|---|
| LMArena Longer Query | 1479 | 1422 |
Writing & Preference GLM-5.2 leads
GLM-5.2: 70.4 (#21), GPT-5.5 Instant: 61.8 (#85)
| Benchmark | GLM-5.2 | GPT-5.5 Instant |
|---|---|---|
| LMArena Text | 1470 | 1419 |
| LMArena Creative Writing | 1462 | 1419 |
| LMArena Multi-Turn | 1469 | 1433 |
| EQ-Bench Creative Writing | 1757 | — |
| EQ-Bench 4 | 1222 | — |
Frequently asked questions
Is GLM-5.2 better than GPT-5.5 Instant?
GLM-5.2 is the stronger model overall, scoring 51.1 to 42.7 on the Noometry Index.
Is GLM-5.2 or GPT-5.5 Instant better for coding?
GLM-5.2 scores higher on coding benchmarks: 51.3 versus 44.3 in the Noometry coding category.
How many benchmarks do GLM-5.2 and GPT-5.5 Instant share?
25 benchmarks have published results for both models. GLM-5.2 has 51 scored results on Noometry and GPT-5.5 Instant has 27.