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Prompt Formatting

LiteLLM automatically translates the OpenAI ChatCompletions prompt format, to other models. You can control this by setting a custom prompt template for a model as well.

Huggingface Models​

LiteLLM supports Huggingface Chat Templates, and will automatically check if your huggingface model has a registered chat template (e.g. Mistral-7b).

For popular models (e.g. meta-llama/llama2), we have their templates saved as part of the package.

Stored Templates

Model NameWorks for ModelsCompletion Call
mistralai/Mistral-7B-Instruct-v0.1mistralai/Mistral-7B-Instruct-v0.1completion(model='huggingface/mistralai/Mistral-7B-Instruct-v0.1', messages=messages, api_base="your_api_endpoint")
meta-llama/Llama-2-7b-chatAll meta-llama llama2 chat modelscompletion(model='huggingface/meta-llama/Llama-2-7b', messages=messages, api_base="your_api_endpoint")
tiiuae/falcon-7b-instructAll falcon instruct modelscompletion(model='huggingface/tiiuae/falcon-7b-instruct', messages=messages, api_base="your_api_endpoint")
mosaicml/mpt-7b-chatAll mpt chat modelscompletion(model='huggingface/mosaicml/mpt-7b-chat', messages=messages, api_base="your_api_endpoint")
codellama/CodeLlama-34b-Instruct-hfAll codellama instruct modelscompletion(model='huggingface/codellama/CodeLlama-34b-Instruct-hf', messages=messages, api_base="your_api_endpoint")
WizardLM/WizardCoder-Python-34B-V1.0All wizardcoder modelscompletion(model='huggingface/WizardLM/WizardCoder-Python-34B-V1.0', messages=messages, api_base="your_api_endpoint")
Phind/Phind-CodeLlama-34B-v2All phind-codellama modelscompletion(model='huggingface/Phind/Phind-CodeLlama-34B-v2', messages=messages, api_base="your_api_endpoint")

Jump to code

Format Prompt Yourself​

You can also format the prompt yourself. Here's how:

import litellm
# Create your own custom prompt template 
litellm.register_prompt_template(
	    model="togethercomputer/LLaMA-2-7B-32K",
        initial_prompt_value="You are a good assistant" # [OPTIONAL]
	    roles={
            "system": {
                "pre_message": "[INST] <<SYS>>\n", # [OPTIONAL]
                "post_message": "\n<</SYS>>\n [/INST]\n" # [OPTIONAL]
            },
            "user": { 
                "pre_message": "[INST] ", # [OPTIONAL]
                "post_message": " [/INST]" # [OPTIONAL]
            }, 
            "assistant": {
                "pre_message": "\n" # [OPTIONAL]
                "post_message": "\n" # [OPTIONAL]
            }
        }
        final_prompt_value="Now answer as best you can:" # [OPTIONAL]
)

def test_huggingface_custom_model():
    model = "huggingface/togethercomputer/LLaMA-2-7B-32K"
    response = completion(model=model, messages=messages, api_base="https://my-huggingface-endpoint")
    print(response['choices'][0]['message']['content'])
    return response

test_huggingface_custom_model()

This is currently supported for Huggingface, TogetherAI, Ollama, and Petals.

Other providers either have fixed prompt templates (e.g. Anthropic), or format it themselves (e.g. Replicate). If there's a provider we're missing coverage for, let us know!

All Providers​

Here's the code for how we format all providers. Let us know how we can improve this further

ProviderModel NameCode
Anthropicclaude-instant-1, claude-instant-1.2, claude-2Code
OpenAI Text Completiontext-davinci-003, text-curie-001, text-babbage-001, text-ada-001, babbage-002, davinci-002,Code
Replicateall model names starting with replicate/Code
Coherecommand-nightly, command, command-light, command-medium-beta, command-xlarge-beta, command-r-plusCode
Huggingfaceall model names starting with huggingface/Code
OpenRouterall model names starting with openrouter/Code
AI21j2-mid, j2-light, j2-ultraCode
VertexAItext-bison, text-bison@001, chat-bison, chat-bison@001, chat-bison-32k, code-bison, code-bison@001, code-gecko@001, code-gecko@latest, codechat-bison, codechat-bison@001, codechat-bison-32kCode
Bedrockall model names starting with bedrock/Code
Sagemakersagemaker/jumpstart-dft-meta-textgeneration-llama-2-7bCode
TogetherAIall model names starting with together_ai/Code
AlephAlphaall model names starting with aleph_alpha/Code
Palmall model names starting with palm/Code
NLP Cloudall model names starting with palm/Code
Petalsall model names starting with petals/Code