Model comparison
GLM-4.5-Air vs Hy4 preview
Hy4 preview is the stronger model overall, scoring 45.3 to 38.9 on the Noometry Index. GLM-4.5-Air costs 2.9× less per token, which makes it the better buy when Hy4 preview's lead doesn't matter for your workload.
Last verified . 0 shared benchmarks.
TencentSummary
- The widest gap is in math, where Hy4 preview leads 55.7 to 36.2.
- GLM-4.5-Air is cheaper at $0.20 / $1.10 per million input/output tokens, against $0.83 / $2.50 for Hy4 preview.
- Hy4 preview accepts more context: 1.05M tokens versus 131K.
Side by side
| GLM-4.5-Air | Hy4 preview | |
|---|---|---|
| Provider | Z.ai (Zhipu) | Tencent |
| Noometry Index | 38.9 | 45.3 |
| Released | 2025-07-20 | 2026-08-28 |
| Weights | Open | Open |
| Context window | 131K | 1.05M |
| Max output | 98K | 64K |
| Input $ / M tokens | $0.20 | $0.83 |
| Output $ / M tokens | $1.10 | $2.50 |
| Results tracked | 27 | 3 |
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Category by category
Coding Hy4 preview leads
GLM-4.5-Air: 33.3 (#259), Hy4 preview: 51.6 (#38)
| Benchmark | GLM-4.5-Air | Hy4 preview |
|---|---|---|
| LMArena WebDev | — | 1632 |
| GSO | 2.9% | — |
| LMArena Coding | 1397 | — |
Reasoning Hy4 preview leads
GLM-4.5-Air: 24.1 (#166), Hy4 preview: 31.9 (#79)
| Benchmark | GLM-4.5-Air | Hy4 preview |
|---|---|---|
| Kagi LLM Benchmark | 43% | — |
| NYT Connections (extended) | — | 68.2% |
| LMArena Hard Prompts | 1379 | — |
| ForecastBench | 59.2 | — |
Math Hy4 preview leads
GLM-4.5-Air: 36.2 (#170), Hy4 preview: 55.7 (#42)
| Benchmark | GLM-4.5-Air | Hy4 preview |
|---|---|---|
| ProofBench | — | 75% |
| Omni-MATH | 39.1% | — |
| LMArena Math | 1396 | — |
Knowledge Not comparable
GLM-4.5-Air: 35.0 (#191), Hy4 preview: —
| Benchmark | GLM-4.5-Air | Hy4 preview |
|---|---|---|
| Humanity's Last Exam | 8.1% | — |
| MMLU-Pro | 76.2% | — |
| Vectara Hallucination Rate | 9.3% | — |
| GPQA (HELM) | 59.4% | — |
| LMArena Expert | 1370 | — |
Multilingual Not comparable
GLM-4.5-Air: 49.1 (#135), Hy4 preview: —
| Benchmark | GLM-4.5-Air | Hy4 preview |
|---|---|---|
| LMArena Non-English | 1366 | — |
| LMArena Chinese | 1426 | — |
| LMArena French | 1399 | — |
| LMArena German | 1377 | — |
| LMArena Japanese | 1348 | — |
| LMArena Korean | 1308 | — |
| LMArena Russian | 1373 | — |
| LMArena Spanish | 1386 | — |
Instruction Following Not comparable
GLM-4.5-Air: 69.6 (#171), Hy4 preview: —
| Benchmark | GLM-4.5-Air | Hy4 preview |
|---|---|---|
| IFEval | 81.2% | — |
| LMArena Instruction Following | 1354 | — |
Long Context Not comparable
GLM-4.5-Air: 41.6 (#135), Hy4 preview: —
| Benchmark | GLM-4.5-Air | Hy4 preview |
|---|---|---|
| LMArena Longer Query | 1366 | — |
Writing & Preference Not comparable
GLM-4.5-Air: 55.9 (#139), Hy4 preview: —
| Benchmark | GLM-4.5-Air | Hy4 preview |
|---|---|---|
| LMArena Text | 1384 | — |
| LMArena Creative Writing | 1343 | — |
| WildBench | 78.9% | — |
| LMArena Multi-Turn | 1371 | — |
Frequently asked questions
Is GLM-4.5-Air better than Hy4 preview?
Hy4 preview is the stronger model overall, scoring 45.3 to 38.9 on the Noometry Index. GLM-4.5-Air costs 2.9× less per token, which makes it the better buy when Hy4 preview's lead doesn't matter for your workload.
Which is cheaper, GLM-4.5-Air or Hy4 preview?
GLM-4.5-Air is cheaper. It lists at $0.20 per million input tokens and $1.10 per million output tokens; Hy4 preview lists at $0.83 and $2.50.
Is GLM-4.5-Air or Hy4 preview better for coding?
Hy4 preview scores higher on coding benchmarks: 51.6 versus 33.3 in the Noometry coding category.
Which has the bigger context window?
Hy4 preview does, with 1.05M tokens against 131K.
How many benchmarks do GLM-4.5-Air and Hy4 preview share?
0 benchmarks have published results for both models. GLM-4.5-Air has 27 scored results on Noometry and Hy4 preview has 3.