text-gen 20B params
mlx-community/gpt-oss-20b-MXFP4-Q8
mlx-community/gpt-oss-20b-MXFP4-Q8
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Hardware Recommendations
Three tiers based on VRAM requirements: minimum for basic inference, comfortable for longer contexts, headroom for future model sizes.
Minimum $599
Apple Mac mini (M4, 16GB)
16GB unified 25W TDP
Runs 20B at Q4_K_M quantization with 4K context.
Comfortable $799
Apple Mac mini (M4, 24GB)
24GB unified 25W TDP
Runs 20B at Q5_K_M quantization with 8K+ context.
VRAM Requirements
| Quantization | VRAM | Use case |
|---|---|---|
| Q4_K_M | 14 GB | Basic inference, 4K context |
| Q5_K_M | 17 GB | Good quality, 8K+ context |
| Q8 | 26 GB | Near-lossless, 16K+ context |
| FP16 | 50 GB | Full precision, max quality |
Formula: params × bytes_per_param × 1.2 overhead + 2 GB base. Actual requirements vary by framework and context length.