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convert: support Mistral 3 Large MoE#17730

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ngxson merged 11 commits intoggml-org:masterfrom
ngxson:xsn/mistral_large_moe
Dec 6, 2025
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convert: support Mistral 3 Large MoE#17730
ngxson merged 11 commits intoggml-org:masterfrom
ngxson:xsn/mistral_large_moe

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@ngxson ngxson commented Dec 3, 2025 •
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WIP, the code is quite ugly for now, but just want to get it to work.

Remember to convert with the --mistral-format argument, as the weight is not yet transformers-compatible

Output F16 weight is 1.35 Terabytes Q8_0 weight is 716GB and I don't have enough hw to test it

Edit: thanks @bartowski1182 for testing it!

Disclaimer: unlike Ministral release, this PR is not affiliated with Mistral Team

NOTE: this PR only covers the conversion to GGUF. the C++ code still missing llama 4 scaling to work, but it will be another PR

@ngxson ngxson changed the title convert: support Mistral 3 Large MoE convert: support Mistral 3 Large MoE (need help for testing) Dec 3, 2025
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bartowski1182 commented Dec 3, 2025

So far so good with this, in a couple hours will be able to test generation

@github-actions github-actions bot added the python python script changes label Dec 3, 2025
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bartowski1182 commented Dec 3, 2025

seems to work and produce coherent results!

@ngxson ngxson marked this pull request as ready for review December 3, 2025 16:54
@ngxson ngxson requested a review from CISC as a code owner December 3, 2025 16:54
@ngxson ngxson marked this pull request as draft December 3, 2025 16:55
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ngxson commented Dec 3, 2025

This PR still needs to be clean up before it is ready for review 😅

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@ngxson ngxson marked this pull request as ready for review December 3, 2025 18:10
@ngxson ngxson changed the title convert: support Mistral 3 Large MoE (need help for testing) convert: support Mistral 3 Large MoE Dec 3, 2025
@ngxson ngxson mentioned this pull request Dec 3, 2025
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CISC
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convert_hf_to_gguf.py
Comment on lines +9941 to +9942
# remap hparams from Mistral MoE format to DeepseekV2 format
# we do this way to be able to reuse DeepseekV2Model set_gguf_parameters logic
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Somewhat ugly but an acceptable trade-off.

@CISC CISC mentioned this pull request Dec 4, 2025
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@taronaeo taronaeo linked an issue Dec 5, 2025 that may be closed by this pull request
Can't convert mistral 3 large #17705
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csabakecskemeti commented Dec 5, 2025

@ngxson Thank you so much for this.
I've also tested the conversion from your branch the convert script succeeded (with --mistral-format) but at inference time (Q8_0) I've received:
llama_model_load: error loading model: missing tensor 'blk.0.attn_k_b.weight'
Tried F16 too it also failed on the same (it should have been failed on not enough memory)

I've tried your Q4_K_M - seems working just fine.
(now downloading @bartowski1182's Q8_0 version to test on that too)

Is there any other setting or change needed for the conversion?
Note I've used Mistral's own BF16 version as the source, which has now disappeared.

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bartowski1182 commented Dec 5, 2025

It disappeared?? 👀 I can re-upload if necessary I guess ..

Only difference is using --mistral-format

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csabakecskemeti commented Dec 5, 2025

Yeah I've used the mistral format. Than I guess I have a corrupted bf16 version (I cannot think of anything else)
Yeah I can't see the BF16 version on HF.
If you ca upload that would be nice.
I made a dequantizer I've used with the Ministral 3 instruct models.
If anyone need it

https://github.com/csabakecskemeti/ministral-3_dequantizer_fp8-bf16

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bartowski1182 commented Dec 5, 2025

I can see it here:

https://huggingface.co/mistralai/Mistral-Large-3-675B-Instruct-2512-BF16

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csabakecskemeti commented Dec 5, 2025

You're right, they just removed it from the collection (it it was ever there :p) there's where I looked for. My bad

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CISC commented Dec 5, 2025

@ngxson Thank you so much for this. I've also tested the conversion from your branch the convert script succeeded (with --mistral-format) but at inference time (Q8_0) I've received: llama_model_load: error loading model: missing tensor 'blk.0.attn_k_b.weight' Tried F16 too it also failed on the same (it should have been failed on not enough memory)

It looks like @ngxson forgot wkv_b remapping in the cleanup.

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@csabakecskemeti This should work.

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csabakecskemeti commented Dec 5, 2025 •
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I can confirm it works with the changes suggested by @CISC
(Converted from FP8 dequantized model)

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49c4e2d 
Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com>
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CISC commented Dec 5, 2025

@ngxson Ouch, that second suggestion should not have been directly applied, GitHub messes up changes outside of preview area. :(

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Update gguf-py/gguf/tensor_mapping.py
15f78b6 
Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com>
@ngxson ngxson merged commit dbc15a7 into ggml-org:master Dec 6, 2025
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JayZenith pushed a commit to JayZenith/llama.cpp that referenced this pull request Dec 7, 2025
@ngxson @CISC @JayZenith
convert: support Mistral 3 Large MoE (ggml-org#17730)
bbdf0bc 
* convert: support Mistral 3 Large MoE

* filter out vision tensors, add missing keys

* handle vocab

* add temperature_length

* fix mscale_all_dim

* clean up

* Apply suggestions from code review

Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com>

* fix

* Update gguf-py/gguf/tensor_mapping.py

Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com>

---------

Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com>
@github-actions github-actions bot mentioned this pull request Dec 7, 2025
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@gabe-l-hart gabe-l-hart mentioned this pull request Dec 10, 2025
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@bibproj2 bibproj2 mentioned this pull request Dec 16, 2025
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0Marble pushed a commit to 0Marble/llama.cpp that referenced this pull request Dec 18, 2025
@ngxson @CISC @0Marble
convert: support Mistral 3 Large MoE (ggml-org#17730)
4da9442 
* convert: support Mistral 3 Large MoE

* filter out vision tensors, add missing keys

* handle vocab

* add temperature_length

* fix mscale_all_dim

* clean up

* Apply suggestions from code review

Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com>

* fix

* Update gguf-py/gguf/tensor_mapping.py

Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com>

---------

Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com>
Anico2 added a commit to Anico2/llama.cpp that referenced this pull request Jan 15, 2026
@Anico2 @CISC
convert: support Mistral 3 Large MoE (ggml-org#17730)
f546711 
* convert: support Mistral 3 Large MoE

* filter out vision tensors, add missing keys

* handle vocab

* add temperature_length

* fix mscale_all_dim

* clean up

* Apply suggestions from code review

Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com>

* fix

* Update gguf-py/gguf/tensor_mapping.py

Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com>

---------

Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com>
@bibproj2 bibproj2 mentioned this pull request Jan 20, 2026
Closed
blime4 referenced this pull request in blime4/llama.cpp Feb 5, 2026
@ngxson @CISC
convert: support Mistral 3 Large MoE (#17730)
007ba9e 
* convert: support Mistral 3 Large MoE

* filter out vision tensors, add missing keys

* handle vocab

* add temperature_length

* fix mscale_all_dim

* clean up

* Apply suggestions from code review

Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com>

* fix

* Update gguf-py/gguf/tensor_mapping.py

Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com>

---------

Co-authored-by: Sigbjørn Skjæret <sigbjorn.skjaeret@scala.com>
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Can't convert mistral 3 large

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