MODEL COMPARISON
gpt-oss-120b vs GLM-4.5-Air
gpt-oss-120b needs less memory: about 77 GB versus about 90 GB for GLM-4.5-Air, a difference of 13 GB. gpt-oss-120b has one runtime in release (Ollama). GLM-4.5-Air has no runtime listed as in release.
SIDE BY SIDE
| Compare | gpt-oss-120b | GLM-4.5-Air |
|---|---|---|
| Memory needed | about 77 GB · Up to 128 GB | about 90 GB · Up to 128 GB |
| Recommended quant | Q4_K_M · 62.8 GB | Q4_K_M · 73.0 GB |
| llama.cpp support | Architecture listedChecked 22 Oct 2026 | Architecture listedChecked 22 Oct 2026 |
| Ollama support | ReleasedChecked 22 Oct 2026 | UnknownVersion v0.40.8 · Checked 22 Oct 2026 |
| LM Studio support | Upload availableChecked 22 Oct 2026 | UnknownChecked 22 Oct 2026 |
| MLX / mlx-lm support | Upload availableChecked 22 Oct 2026 | Upload availableChecked 22 Oct 2026 |
| vLLM support | Architecture listedChecked 22 Oct 2026 | Architecture listedChecked 22 Oct 2026 |
| On Hugging Face since | 04 Aug 2025 | 20 Jul 2025 |
| License | Not recorded in this snapshot — see the model card ↗ | Not recorded in this snapshot — see the model card ↗ |
| Publisher | openai | zai-org |
| Downloads | 3M | 817.6K |
| Model page | Open gpt-oss-120b ↗ | Open GLM-4.5-Air ↗ |
| Fits these setups |
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Memory needed is the same estimate shown on each model page: the recommended observed file plus 20% headroom and a 1.5 GB runtime allowance. See which setups fit →
These are estimates from observed file sizes, not benchmarks. They don’t account for long contexts or the KV cache, and fitting does not establish runtime compatibility or speed.