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README: lead with the int8-MTP mirror, make the int4-head 0%-acceptance trap unmissable (#8, #102) — the #1 support confusion

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Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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JustVugg
2026-07-12 23:08:36 +02:00
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@@ -60,21 +60,23 @@ Cold starts are heavy on random reads (~11 GB/token), but reads don't meaningful
## Download the model
A pre-converted **GLM-5.2 int4** model for colibrì is available on Hugging Face:
A pre-converted **GLM-5.2 int4** model for colibrì is available on Hugging Face — **use the version with the int8 MTP heads** (matey-0's clone):
**https://huggingface.co/jlnsrk/GLM-5.2-colibri-int4**
**https://huggingface.co/mateogrgic/GLM-5.2-colibri-int4-with-int8-mtp**
If the MTP files there are still the int4 head (see [#8](https://github.com/JustVugg/colibri/issues/8) — sizes `1765523544/2686077736/536747200` = int4, unusable), grab the **int8 MTP heads** from the community clone by matey-0: **https://huggingface.co/mateogrgic/GLM-5.2-colibri-int4-with-int8-mtp**
> ⚠️ **The MTP head must be int8.** The original mirror ([jlnsrk/GLM-5.2-colibri-int4](https://huggingface.co/jlnsrk/GLM-5.2-colibri-int4)) ships **int4** MTP heads, which give **0% draft acceptance** — speculation silently never engages and you lose the ~2× MTP lever. This is the single most common "why is MTP stuck at 0%?" report ([#8](https://github.com/JustVugg/colibri/issues/8), [#102](https://github.com/JustVugg/colibri/issues/102)). The int8 head gives the measured **39–59% acceptance**. matey-0's clone above is the original int4 model with the three `out-mtp-*` files already swapped to int8 — download that one and you're done.
>
> Check what you have: `ls -l <model>/out-mtp-*`
> · **int8 (correct):** `3527131672 / 5366238584 / 1065950496`
> · **int4 (0% acceptance):** `1765523544 / 2686077736 / 536747200` — if you see these, replace just those three files from the int8 mirror.
Download the repository and point `COLI_MODEL` to its directory:
```bash
COLI_MODEL=/path/to/GLM-5.2-colibri-int4 ./coli chat
COLI_MODEL=/path/to/GLM-5.2-colibri-int4-with-int8-mtp ./coli chat
```
This skips the FP8 → int4 conversion step entirely.
Thanks DatPat for your help!
This skips the FP8 → int4 conversion step entirely. Thanks to DatPat for the original mirror and matey-0 for the int8-head clone.
### Quick start