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Comparison table
| Item | gpt-oss-20b openai ✕ Remove |
|---|---|
| Parameters | 20.9B |
| Architecture | gpt-oss |
| Max context length | 131,072 |
| Representative quantization and size Measured | Q4_K_M · 11.6 GB |
| Memory at 8K Estimated | 12.8 GB |
| Memory at 32K Estimated | 13.4 GB |
| VRAM it fits (8K) Estimated | VRAM 12 GB+ |
| Smallest quantization (8K) Estimated | Q3_K_S · 11.5 GB → 12.6 GB |
| License | Apache License 2.0 Commercial OK |
| llama.cpp support | llama.cpp b6096 and later |
| Downloads (30 days, total) | 1,103,373 |
| Human preference (LMArena) | 1,318 gpt-oss-20b |
| Capabilities (Epoch AI) | 135.0 gpt-oss-20b |
| Hard science (GPQA) | 60.8% gpt-oss-20b_medium |
- The representative quantization is Q4_K_M (or the smallest one if missing) from the source with the most downloads. Memory is estimated with an f16 KV cache.
- Third-party evaluations are other organizations' values for the original model before quantization, not this site's rating (sources are on the ranking page).
- This site does not judge which model is better or give an overall score.