MODEL COMPARISON
Qwen3-4B vs Qwen3.5-4B
Qwen3-4B and Qwen3.5-4B need about the same memory (within 1 GB): about 5 GB and about 5 GB (text weights only). Qwen3-4B has one runtime in release (Ollama). Qwen3.5-4B has one runtime in release (Ollama).
SIDE BY SIDE
| Compare | Qwen3-4B | Qwen3.5-4B |
|---|---|---|
| Memory needed | about 5 GB · Up to 8 GB (laptop) | about 5 GB · Up to 8 GB (laptop) (text weights only) |
| Recommended quant | Q4_K_M · 2.5 GB | Q4_K_M · 2.7 GB |
| llama.cpp support | Architecture listedChecked 22 Oct 2026 | Architecture listedChecked 22 Oct 2026 |
| Ollama support | ReleasedChecked 22 Oct 2026 | ReleasedChecked 22 Oct 2026 |
| LM Studio support | Upload availableChecked 22 Oct 2026 | Upload availableChecked 22 Oct 2026 |
| MLX / mlx-lm support | Architecture listedChecked 22 Oct 2026 | Architecture listedChecked 22 Oct 2026 |
| vLLM support | Architecture listedChecked 22 Oct 2026 | Architecture listedChecked 22 Oct 2026 |
| On Hugging Face since | 27 Apr 2025 | 27 Feb 2026 |
| License | Not recorded in this snapshot — see the model card ↗ | Not recorded in this snapshot — see the model card ↗ |
| Publisher | Qwen | Qwen |
| Downloads | 11.6M | 7.6M |
| Model page | Open Qwen3-4B ↗ | Open Qwen3.5-4B ↗ |
| 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.