Olmo-3-7B-Think
allenai/Olmo-3-7B-ThinkOlmo-3-7B-Think at Q4_K_M is exactly 4,471,600,192 bytes (4.16 GiB / 4.47 GB) — an effective 4.902 bits per weight, not the nominal 4. Its KV cache at 32K is 5.69 GiB, not the 16.00 GiB a flat formula predicts.
Shipped quantizations
| Quant | Size● | Exact bytes● | Effective bpw● | Tensors● | Publisher |
|---|---|---|---|---|---|
| I1-IQ1_S | 1.69 GiB | 1,816,488,736 | 1.991 | — | mradermacher |
| I1-IQ1_M | 1.81 GiB | 1,938,877,216 | 2.125 | — | mradermacher |
| UD-IQ1_S | 1.81 GiB | 1,941,746,112 | 2.128 | — | unsloth |
| UD-IQ1_M | 1.90 GiB | 2,042,294,720 | 2.239 | — | unsloth |
| I1-IQ2_XXS | 2.00 GiB | 2,142,858,016 | 2.349 | — | mradermacher |
| UD-IQ2_XXS | 2.10 GiB | 2,254,090,688 | 2.471 | — | unsloth |
| I1-IQ2_XS | 2.16 GiB | 2,322,819,872 | 2.546 | — | mradermacher |
| I1-IQ2_S | 2.34 GiB | 2,512,876,256 | 2.755 | — | mradermacher |
| I1-Q2_K_S | 2.46 GiB | 2,644,594,144 | 2.899 | — | mradermacher |
| I1-IQ2_M | 2.49 GiB | 2,676,060,896 | 2.933 | — | mradermacher |
| UD-IQ2_M | 2.53 GiB | 2,717,036,992 | 2.978 | — | unsloth |
| Q2_K | 2.66 GiB | 2,857,913,536 | 3.133 | — | unsloth |
| I1-Q2_K | 2.66 GiB | 2,857,913,824 | 3.133 | — | mradermacher |
| I1-IQ3_XXS | 2.70 GiB | 2,901,701,344 | 3.181 | — | mradermacher |
| UD-IQ3_XXS | 2.74 GiB | 2,944,340,416 | 3.228 | — | unsloth |
| Q2_K_L | 2.75 GiB | 2,954,180,416 | 3.238 | — | unsloth |
| I1-IQ3_XS | 2.93 GiB | 3,149,976,992 | 3.453 | — | mradermacher |
| Q3_K_S | 3.08 GiB | 3,301,758,080 | 3.619 | — | unsloth |
| I1-Q3_K_S | 3.08 GiB | 3,301,758,368 | 3.619 | — | mradermacher |
| I1-IQ3_S | 3.08 GiB | 3,301,758,368 | 3.619 | — | mradermacher |
| I1-IQ3_M | 3.23 GiB | 3,468,318,112 | 3.802 | — | mradermacher |
| Q3_K_M | 3.40 GiB | 3,651,458,176 | 4.003 | — | unsloth |
| I1-Q3_K_M | 3.40 GiB | 3,651,458,464 | 4.003 | — | mradermacher |
| I1-Q3_K_L | 3.68 GiB | 3,950,564,768 | 4.331 | — | mradermacher |
| I1-IQ4_XS | 3.73 GiB | 4,001,193,312 | 4.386 | — | mradermacher |
| IQ4_XS | 3.74 GiB | 4,014,028,608 | 4.400 | — | unsloth |
| IQ4_NL | 3.93 GiB | 4,216,403,776 | 4.622 | — | unsloth |
| I1-IQ4_NL | 3.93 GiB | 4,216,404,064 | 4.622 | — | mradermacher |
| Q4_0 | 3.94 GiB | 4,227,675,968 | 4.634 | — | unsloth |
| I1-Q4_0 | 3.94 GiB | 4,227,676,256 | 4.634 | — | mradermacher |
| Q4_K_S | 3.96 GiB | 4,247,336,768 | 4.656 | — | unsloth |
| I1-Q4_K_S | 3.96 GiB | 4,247,337,056 | 4.656 | — | mradermacher |
| Q4_K_M | 4.16 GiB | 4,471,600,192 | 4.902 | — | lmstudio-community |
| Q4_K_M | 4.16 GiB | 4,471,600,960 | 4.902 | — | unsloth |
| I1-Q4_K_M | 4.16 GiB | 4,471,601,248 | 4.902 | — | mradermacher |
| Q4_1 | 4.33 GiB | 4,646,825,280 | 5.094 | — | unsloth |
| I1-Q4_1 | 4.33 GiB | 4,646,825,568 | 5.094 | — | mradermacher |
| Q5_K_S | 4.73 GiB | 5,077,246,784 | 5.566 | — | unsloth |
| I1-Q5_K_S | 4.73 GiB | 5,077,247,072 | 5.566 | — | mradermacher |
| Q5_K_M | 4.85 GiB | 5,208,712,000 | 5.710 | — | unsloth |
KV cache by context
| Context | KV cache (f16)● | Flat formula | Overstated by | Full / windowed / recurrent |
|---|---|---|---|---|
| 4,096 | 2.00 GiB | 2.00 GiB | — | 8 / 24 / 0 |
| 8,192 | 2.69 GiB | 4.00 GiB | 1.49× | 8 / 24 / 0 |
| 16,384 | 3.69 GiB | 8.00 GiB | 2.17× | 8 / 24 / 0 |
| 32,768 | 5.69 GiB | 16.00 GiB | 2.81× | 8 / 24 / 0 |
| 65,536 | 9.69 GiB | 32.00 GiB | 3.30× | 8 / 24 / 0 |
| 131,072 | 17.69 GiB | 64.00 GiB | 3.62× | 8 / 24 / 0 |
24 of 32 layers cache only a 4,096-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 Q4_K_M at roughly 3.82 GiB. The real file is 4.16 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 16.00 GiB at 32K context where the real figure is 5.69 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 Olmo-3-7B-Think need?
- Q4_K_M is exactly 4,471,600,192 bytes (4.16 GiB) in weights. Add the KV cache, which depends on your context length, plus roughly half a gigabyte of runtime overhead.
- How large is Olmo-3-7B-Think's KV cache?
- 5.69 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.
- Which quantization of Olmo-3-7B-Think 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.