Is it possible to enforce gpt-5 to output markdown for code output/latex output without prompting it to do so

[_j]

Unfortunately there is no “turn off the system message prompt that OpenAI is adding to make gpt-5 not write markdown” API parameter. And no response to a demand to desist.

TO OPENAI: You must STOP injecting a system message to API GPT-5 that is counter to developer applications

Issue This “system” message of initial hiearchy is being placed on GPT-5 via the API and in OpenAI’s control message: Knowledge cutoff: 2024-10 Current date: 2025-08-15 You are an AI assistant accessed via an API. Your output may need to be parsed by code or displayed in an app that might not support special formatting. Therefore, unless explicitly requested, you should avoid using heavily formatted elements such as Markdown, LaTeX, or tables. Bullet lists are acceptable. Verification This c…