Model comparison
GLM-4.5V vs GPT-5.5 Instant
GPT-5.5 Instant is the stronger model overall, scoring 42.7 to 39.8 on the Noometry Index.
Last verified . 14 shared benchmarks.
Summary
- They share 14 benchmarks with published results for both. GLM-4.5V scores higher in 2 categories and GPT-5.5 Instant in 7 categories; 9 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where GPT-5.5 Instant leads 48.9 to 37.5.
- GLM-4.5V has downloadable open weights; the other is API-only.
Side by side
| GLM-4.5V | GPT-5.5 Instant | |
|---|---|---|
| Provider | Z.ai (Zhipu) | OpenAI |
| Noometry Index | 39.8 | 42.7 |
| Released | 2025-08-11 | 2026-05-05 |
| Weights | Open | Proprietary |
| Context window | 64K | — |
| Max output | 16K | — |
| Input $ / M tokens | $0.60 | — |
| Output $ / M tokens | $1.80 | — |
| Results tracked | 15 | 27 |
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Category by category
Coding GPT-5.5 Instant leads
GLM-4.5V: 39.5 (#155), GPT-5.5 Instant: 44.3 (#74)
| Benchmark | GLM-4.5V | GPT-5.5 Instant |
|---|---|---|
| LMArena Coding | 1347 | 1433 |
| SciCode | — | 48.6% |
Reasoning GLM-4.5V leads
GLM-4.5V: 27.4 (#119), GPT-5.5 Instant: 24.9 (#155)
| Benchmark | GLM-4.5V | GPT-5.5 Instant |
|---|---|---|
| LMArena Hard Prompts | 1334 | 1426 |
| Kagi LLM Benchmark | 59.8% | — |
| CritPt | — | 0% |
| Chess Puzzles | — | 12% |
| Epoch Capabilities Index | — | 142.52 |
Math GLM-4.5V leads
GLM-4.5V: 37.4 (#159), GPT-5.5 Instant: 26.5 (#259)
| Benchmark | GLM-4.5V | GPT-5.5 Instant |
|---|---|---|
| LMArena Math | 1354 | 1420 |
| FrontierMath (Tiers 1-3) | — | 26.3% |
| FrontierMath Tier 4 | — | 2.4% |
| OTIS Mock AIME 2024-2025 | — | 68.1% |
Knowledge GPT-5.5 Instant leads
GLM-4.5V: 37.5 (#156), GPT-5.5 Instant: 48.9 (#74)
| Benchmark | GLM-4.5V | GPT-5.5 Instant |
|---|---|---|
| LMArena Expert | 1353 | 1409 |
| GPQA Diamond | — | 82.5% |
Multimodal GPT-5.5 Instant leads
GLM-4.5V: 34.3 (#92), GPT-5.5 Instant: 40.0 (#52)
| Benchmark | GLM-4.5V | GPT-5.5 Instant |
|---|---|---|
| LMArena Vision | 1154 | 1250 |
| LMArena Document | — | 1403 |
Multilingual GPT-5.5 Instant leads
GLM-4.5V: 44.6 (#177), GPT-5.5 Instant: 52.8 (#80)
| Benchmark | GLM-4.5V | GPT-5.5 Instant |
|---|---|---|
| LMArena Non-English | 1303 | 1417 |
| LMArena Chinese | 1337 | 1456 |
| LMArena Russian | 1298 | 1431 |
| LMArena Spanish | 1336 | 1429 |
| LMArena French | — | 1428 |
| LMArena German | — | 1411 |
| LMArena Japanese | — | 1408 |
| LMArena Korean | — | 1392 |
Instruction Following GPT-5.5 Instant leads
GLM-4.5V: 69.2 (#175), GPT-5.5 Instant: 74.2 (#100)
| Benchmark | GLM-4.5V | GPT-5.5 Instant |
|---|---|---|
| LMArena Instruction Following | 1311 | 1406 |
Long Context GPT-5.5 Instant leads
GLM-4.5V: 39.6 (#171), GPT-5.5 Instant: 43.4 (#96)
| Benchmark | GLM-4.5V | GPT-5.5 Instant |
|---|---|---|
| LMArena Longer Query | 1304 | 1422 |
Writing & Preference GPT-5.5 Instant leads
GLM-4.5V: 52.5 (#170), GPT-5.5 Instant: 61.8 (#85)
| Benchmark | GLM-4.5V | GPT-5.5 Instant |
|---|---|---|
| LMArena Text | 1333 | 1419 |
| LMArena Creative Writing | 1295 | 1419 |
| LMArena Multi-Turn | 1332 | 1433 |
Frequently asked questions
Is GLM-4.5V better than GPT-5.5 Instant?
GPT-5.5 Instant is the stronger model overall, scoring 42.7 to 39.8 on the Noometry Index.
Is GLM-4.5V or GPT-5.5 Instant better for coding?
GPT-5.5 Instant scores higher on coding benchmarks: 44.3 versus 39.5 in the Noometry coding category.
How many benchmarks do GLM-4.5V and GPT-5.5 Instant share?
14 benchmarks have published results for both models. GLM-4.5V has 15 scored results on Noometry and GPT-5.5 Instant has 27.