Model comparison
GLM-4.5-Air vs Kimi K2.5 Instant
Kimi K2.5 Instant is the stronger model overall, scoring 43.6 to 38.9 on the Noometry Index.
Last verified . 16 shared benchmarks.
Summary
- They share 16 benchmarks with published results for both. GLM-4.5-Air scores higher in 0 categories and Kimi K2.5 Instant in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in coding, where Kimi K2.5 Instant leads 42.6 to 33.3.
Side by side
| GLM-4.5-Air | Kimi K2.5 Instant | |
|---|---|---|
| Provider | Z.ai (Zhipu) | Moonshot AI |
| Noometry Index | 38.9 | 43.6 |
| Released | 2025-07-20 | — |
| Weights | Open | Open |
| Context window | 131K | — |
| Max output | 98K | — |
| Input $ / M tokens | $0.20 | — |
| Output $ / M tokens | $1.10 | — |
| Results tracked | 27 | 18 |
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Category by category
Coding Kimi K2.5 Instant leads
GLM-4.5-Air: 33.3 (#259), Kimi K2.5 Instant: 42.6 (#97)
| Benchmark | GLM-4.5-Air | Kimi K2.5 Instant |
|---|---|---|
| LMArena Coding | 1397 | 1484 |
| LMArena WebDev | — | 1404 |
| GSO | 2.9% | — |
Reasoning Kimi K2.5 Instant leads
GLM-4.5-Air: 24.1 (#166), Kimi K2.5 Instant: 29.7 (#90)
| Benchmark | GLM-4.5-Air | Kimi K2.5 Instant |
|---|---|---|
| LMArena Hard Prompts | 1379 | 1443 |
| Kagi LLM Benchmark | 43% | — |
| ForecastBench | 59.2 | — |
Math Kimi K2.5 Instant leads
GLM-4.5-Air: 36.2 (#170), Kimi K2.5 Instant: 39.4 (#105)
| Benchmark | GLM-4.5-Air | Kimi K2.5 Instant |
|---|---|---|
| LMArena Math | 1396 | 1442 |
| Omni-MATH | 39.1% | — |
Knowledge Kimi K2.5 Instant leads
GLM-4.5-Air: 35.0 (#191), Kimi K2.5 Instant: 40.2 (#123)
| Benchmark | GLM-4.5-Air | Kimi K2.5 Instant |
|---|---|---|
| LMArena Expert | 1370 | 1440 |
| Humanity's Last Exam | 8.1% | — |
| MMLU-Pro | 76.2% | — |
| Vectara Hallucination Rate | 9.3% | — |
| GPQA (HELM) | 59.4% | — |
Multimodal Not comparable
GLM-4.5-Air: —, Kimi K2.5 Instant: 40.2 (#50)
| Benchmark | GLM-4.5-Air | Kimi K2.5 Instant |
|---|---|---|
| LMArena Vision | — | 1254 |
Multilingual Kimi K2.5 Instant leads
GLM-4.5-Air: 49.1 (#135), Kimi K2.5 Instant: 52.0 (#94)
| Benchmark | GLM-4.5-Air | Kimi K2.5 Instant |
|---|---|---|
| LMArena Non-English | 1366 | 1406 |
| LMArena Chinese | 1426 | 1449 |
| LMArena French | 1399 | 1403 |
| LMArena German | 1377 | 1413 |
| LMArena Korean | 1308 | 1378 |
| LMArena Russian | 1373 | 1404 |
| LMArena Spanish | 1386 | 1447 |
| LMArena Japanese | 1348 | — |
Instruction Following Kimi K2.5 Instant leads
GLM-4.5-Air: 69.6 (#171), Kimi K2.5 Instant: 75.3 (#65)
| Benchmark | GLM-4.5-Air | Kimi K2.5 Instant |
|---|---|---|
| LMArena Instruction Following | 1354 | 1430 |
| IFEval | 81.2% | — |
Long Context Kimi K2.5 Instant leads
GLM-4.5-Air: 41.6 (#135), Kimi K2.5 Instant: 43.9 (#83)
| Benchmark | GLM-4.5-Air | Kimi K2.5 Instant |
|---|---|---|
| LMArena Longer Query | 1366 | 1435 |
Writing & Preference Kimi K2.5 Instant leads
GLM-4.5-Air: 55.9 (#139), Kimi K2.5 Instant: 60.6 (#95)
| Benchmark | GLM-4.5-Air | Kimi K2.5 Instant |
|---|---|---|
| LMArena Text | 1384 | 1420 |
| LMArena Creative Writing | 1343 | 1381 |
| LMArena Multi-Turn | 1371 | 1427 |
| WildBench | 78.9% | — |
Frequently asked questions
Is GLM-4.5-Air better than Kimi K2.5 Instant?
Kimi K2.5 Instant is the stronger model overall, scoring 43.6 to 38.9 on the Noometry Index.
Is GLM-4.5-Air or Kimi K2.5 Instant better for coding?
Kimi K2.5 Instant scores higher on coding benchmarks: 42.6 versus 33.3 in the Noometry coding category.
How many benchmarks do GLM-4.5-Air and Kimi K2.5 Instant share?
16 benchmarks have published results for both models. GLM-4.5-Air has 27 scored results on Noometry and Kimi K2.5 Instant has 18.