Mistral Persona Prefix: 3 Words, Fewer Tokens

Detailed system prompts explaining persona, tone, and language consume significant prompt tokens. Mistral's prefix cookbook shows that a concise 3-word prefix such as prefix = "Assistant Pirate Français : " implicitly conveys the persona, language, and dialogue task; pair it with a concise system prompt to prevent noisy completions.

messages = [ {"role": "system", "content": "Answer accurately in the specified persona."}, {"role": "user", "content": "Explain cloud object storage."}, {"role": "assistant", "content": "Architecte Cloud Français : ", "prefix": True} ]