OpenAI-gpt-oss-20B-Claude-4.5-Opus-Heretic-Uncensored
DavidAU/OpenAI-gpt-oss-20B-Claude-4.5-Opus-Heretic-UncensoredOpenAI-gpt-oss-20B-Claude-4.5-Opus-Heretic-Uncensored at I1-IQ1_S is exactly 12,016,855,104 bytes (11.19 GiB / 12.02 GB) — an effective 4.596 bits per weight, not the nominal 1. Its KV cache at 32K is 0.77 GiB, not the 1.50 GiB a flat formula predicts.
Shipped quantizations
| Quant | Size● | Exact bytes● | Effective bpw● | Tensors● | Publisher |
|---|---|---|---|---|---|
| I1-IQ1_S | 11.19 GiB | 12,016,855,104 | 4.596 | — | mradermacher |
| I1-IQ1_S | 11.19 GiB | 12,016,855,104 | 4.596 | — | fairy322 |
| I1-IQ2_XXS | 11.19 GiB | 12,016,855,104 | 4.596 | — | fairy322 |
| I1-IQ1_M | 11.19 GiB | 12,016,855,104 | 4.596 | — | mradermacher |
| I1-IQ1_M | 11.19 GiB | 12,016,855,104 | 4.596 | — | fairy322 |
| I1-IQ2_XXS | 11.19 GiB | 12,016,855,104 | 4.596 | — | mradermacher |
| I1-IQ2_XS | 11.20 GiB | 12,025,702,464 | 4.600 | — | fairy322 |
| I1-IQ2_XS | 11.20 GiB | 12,025,702,464 | 4.600 | — | mradermacher |
| I1-Q3_K_S | 11.23 GiB | 12,061,091,904 | 4.613 | — | fairy322 |
| I1-Q3_K_S | 11.23 GiB | 12,061,091,904 | 4.613 | — | mradermacher |
| I1-IQ2_M | 11.24 GiB | 12,065,515,584 | 4.615 | — | mradermacher |
| I1-IQ3_XS | 11.24 GiB | 12,065,515,584 | 4.615 | — | fairy322 |
| I1-IQ3_XS | 11.24 GiB | 12,065,515,584 | 4.615 | — | mradermacher |
| I1-IQ2_S | 11.24 GiB | 12,065,515,584 | 4.615 | — | mradermacher |
| I1-IQ2_S | 11.24 GiB | 12,065,515,584 | 4.615 | — | fairy322 |
| I1-Q2_K | 11.24 GiB | 12,065,515,584 | 4.615 | — | fairy322 |
| I1-IQ3_S | 11.24 GiB | 12,065,515,584 | 4.615 | — | mradermacher |
| I1-IQ2_M | 11.24 GiB | 12,065,515,584 | 4.615 | — | fairy322 |
| I1-IQ3_XXS | 11.24 GiB | 12,065,515,584 | 4.615 | — | mradermacher |
| I1-IQ3_S | 11.24 GiB | 12,065,515,584 | 4.615 | — | fairy322 |
| I1-IQ3_XXS | 11.24 GiB | 12,065,515,584 | 4.615 | — | fairy322 |
| I1-Q2_K | 11.24 GiB | 12,065,515,584 | 4.615 | — | mradermacher |
| I1-IQ4_XS | 11.27 GiB | 12,096,481,344 | 4.627 | — | fairy322 |
| I1-IQ4_XS | 11.27 GiB | 12,096,481,344 | 4.627 | — | mradermacher |
| I1-Q2_K_S | 11.30 GiB | 12,136,294,464 | 4.642 | — | fairy322 |
| I1-Q2_K_S | 11.30 GiB | 12,136,294,464 | 4.642 | — | mradermacher |
| I1-Q4_0 | 11.31 GiB | 12,148,459,584 | 4.647 | — | fairy322 |
| I1-Q4_0 | 11.31 GiB | 12,148,459,584 | 4.647 | — | mradermacher |
| I1-IQ3_M | 11.36 GiB | 12,202,649,664 | 4.668 | — | mradermacher |
| I1-IQ3_M | 11.36 GiB | 12,202,649,664 | 4.668 | — | fairy322 |
| I1-Q3_K_M | 12.03 GiB | 12,916,152,384 | 4.941 | — | mradermacher |
| I1-Q3_K_M | 12.03 GiB | 12,916,152,384 | 4.941 | — | fairy322 |
| I1-Q3_K_L | 12.42 GiB | 13,335,111,744 | 5.101 | — | mradermacher |
| I1-Q3_K_L | 12.42 GiB | 13,335,111,744 | 5.101 | — | fairy322 |
| I1-Q4_1 | 12.45 GiB | 13,369,095,744 | 5.114 | — | mradermacher |
| I1-Q4_1 | 12.45 GiB | 13,369,095,744 | 5.114 | — | fairy322 |
| Q4_K_S | 13.65 GiB | 14,654,226,560 | 5.605 | — | Lachhhhhhh |
| I1-Q4_K_S | 13.65 GiB | 14,654,243,904 | 5.605 | — | fairy322 |
| I1-Q4_K_S | 13.65 GiB | 14,654,243,904 | 5.605 | — | mradermacher |
| I1-Q4_K_M | 14.72 GiB | 15,805,137,984 | 6.045 | — | fairy322 |
KV cache by context
| Context | KV cache (f16)● | Flat formula | Overstated by | Full / windowed / recurrent |
|---|---|---|---|---|
| 4,096 | 0.11 GiB | 0.19 GiB | 1.68× | 12 / 12 / 0 |
| 8,192 | 0.21 GiB | 0.38 GiB | 1.83× | 12 / 12 / 0 |
| 16,384 | 0.39 GiB | 0.75 GiB | 1.91× | 12 / 12 / 0 |
| 32,768 | 0.77 GiB | 1.50 GiB | 1.95× | 12 / 12 / 0 |
| 65,536 | 1.52 GiB | 3.00 GiB | 1.98× | 12 / 12 / 0 |
| 131,072 | 3.02 GiB | 6.00 GiB | 1.99× | 12 / 12 / 0 |
12 of 24 layers cache only a 128-token window rather than the full context, on a period of . Figures assume the default configuration; --swa-full disables the saving entirely.
Compare with
Will it run on your card?
Why other calculators give a different number
A parameters × bits ÷ 8 estimate puts I1-IQ1_S at roughly 10.96 GiB. The real file is 11.19 GiB, because a quantization is a mixture and some tensors are always kept at higher precision. The larger discrepancy is the cache: a flat formula gives 1.50 GiB at 32K context where the real figure is 0.77 GiB, because most of this model's layers cache a fixed window rather than the whole context.
Architecture
Questions people ask
- How much VRAM does OpenAI-gpt-oss-20B-Claude-4.5-Opus-Heretic-Uncensored need?
- I1-IQ1_S is exactly 12,016,855,104 bytes (11.19 GiB) in weights. Add the KV cache, which depends on your context length, plus roughly half a gigabyte of runtime overhead.
- How large is OpenAI-gpt-oss-20B-Claude-4.5-Opus-Heretic-Uncensored's KV cache?
- 0.77 GiB at 32K context with an f16 cache, computed per layer. Quantizing the cache to q8_0 roughly halves it, which is often the difference between a context length fitting and not.
- Is OpenAI-gpt-oss-20B-Claude-4.5-Opus-Heretic-Uncensored a mixture-of-experts model?
- Yes — 32 experts, 4 routed per token. Every expert must be resident, but only the routed ones are read per token, which is why its memory requirement and its speed behave very differently.
- Which quantization of OpenAI-gpt-oss-20B-Claude-4.5-Opus-Heretic-Uncensored should I use?
- Q4_K_M is the usual default. Pick the largest quantization that fits your card at the context you actually need — the table above gives exact sizes for every one published.