8000 Detect Mixtral's slightly different format by lukestanley · Pull Request #1214 · abetlen/llama-cpp-python · GitHub
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Detect Mixtral's slightly different format #1214

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merged 1 commit into from
Feb 23, 2024
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Detect Mixtral's slightly different format #1214

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5 changes: 4 additions & 1 deletion llama_cpp/llama_chat_format.py
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Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,8 @@
MISTRAL_INSTRUCT_BOS_TOKEN = "<s>"
MISTRAL_INSTRUCT_EOS_TOKEN = "</s>"

# Source: https://huggingface.co/mistralai/Mixtral-8x7B-Instruct-v0.1/blob/main/tokenizer_config.json
MIXTRAL_INSTRUCT_CHAT_TEMPLATE = "{{ bos_token }}{% for message in messages %}{% if (message['role'] == 'user') != (loop.index0 % 2 == 0) %}{{ raise_exception('Conversation roles must alternate user/assistant/user/assistant/...') }}{% endif %}{% if message['role'] == 'user' %}{{ '[INST] ' + message['content'] + ' [/INST]' }}{% elif message['role'] == 'assistant' %}{{ message['content'] + eos_token}}{% else %}{{ raise_exception('Only user and assistant roles are supported!') }}{% endif %}{% endfor %}"

### Chat Completion Handler ###

Expand Down Expand Up @@ -470,7 +472,8 @@ def guess_chat_format_from_gguf_metadata(metadata: Dict[str, str]) -> Optional[s
if metadata["tokenizer.chat_template"] == CHATML_CHAT_TEMPLATE:
return "chatml"

if metadata["tokenizer.chat_template"] == MISTRAL_INSTRUCT_CHAT_TEMPLATE:
if (metadata["tokenizer.chat_template"] == MISTRAL_INSTRUCT_CHAT_TEMPLATE or
metadata["tokenizer.chat_template"] == MIXTRAL_INSTRUCT_CHAT_TEMPLATE):
return "mistral-instruct"

return None
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