From Anthropic's docs: https://docs.anthropic.com/claude/docs/configuring-gpt-prompts-for-claude#put-words-in-claudes-mouth https://docs.anthropic.com/claude/do

From Anthropic's docs: https://docs.anthropic.com/claude/docs/configuring-gpt-prompts-for-claude#put-words-in-claudes-mouth https://docs.anthropic.com/claude/docs/configuring-gpt-promp... In OpenAI's case their "\n\nAssistant:" equivalent is added server side with no option to prefill the response.