ConceptChat Markup Language
ChatML
A markup specification for formatting conversations in large language models. It uses <|im_start|> and <|im_end|> tokens to delimit role boundaries and has been adopted by multiple models including Qwen and Phi.
Timeline (last 90 days)
Oct 10
Mistral/Mixtral wraps user input with [INST] and [/INST]; the ChatML format uses <|im_start|> and <|im_end|> as markers and is adopted by multiple models including Qwen and Phi.
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Sep 27
The Qwen series adopts the ChatML format, beginning with <|im_start|>system.
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