Eval bug: ApertusForCausalLM is not supported - gguf conversion for model swiss-ai/Apertus-8B-Instruct-2509 & swiss-ai/Apertus-70B-Instruct-2509

[ClaudeStabile]

Name and Version

version: 6357 (0a2a384)
built with cc (Ubuntu 14.2.0-19ubuntu2) 14.2.0 for x86_64-linux-gnu

When i try to convert files to .gguf format using convert_hf_to_gguf.py
i get this error :
INFO:hf-to-gguf:Model architecture: ApertusForCausalLM
ERROR:hf-to-gguf:Model ApertusForCausalLM is not supported

I am expecting to convert latest apertus LLM files to .gguf format i used to do that with several LLM published on huggingface

I did a conversion try with this brand new LLM
https://huggingface.co/swiss-ai/Apertus-8B-Instruct-2509

I have updated transformers to 4.56.0 as requested by ApertusForCausalLM

Tu reproduce : Download LLM files and try to convert to .gguf format using convert_hf_to_gguf.py

Many thanks in advance for effort and clues

Operating systems

Linux

GGML backends

CUDA

Hardware

13th Gen Intel(R) Core(TM) i9-13900K To Be Filled By O.E.M. CPU @ 3.0GHz
2x NVIDIA GeForce RTX 4090

Models

swiss-ai/Apertus-8B-Instruct-2509 & swiss-ai/Apertus-70B-Instruct-2509

Problem description & steps to reproduce

To reproduce : Download LLM files swiss-ai/Apertus-8B-Instruct-2509 and try to convert to .gguf format using convert_hf_to_gguf.py

First Bad Commit

No response

Relevant log output

(gguf_env) llama@aiborg:/data/LLAMA/llama.cpp$ /data/LLAMA/llama.cpp/convert_hf_to_gguf.py --outtype f16 --outfile /data/LLAMA/models/Swiss-AI/apertus-70B/swissai-70B.gguf /data/LLAMA/models/Swiss-AI/apertus-70B/
INFO:hf-to-gguf:Loading model: apertus-70B
INFO:hf-to-gguf:Model architecture: ApertusForCausalLM
ERROR:hf-to-gguf:Model ApertusForCausalLM is not supported

[pwilkin]

See #15748