gpt-5.4/5.5/5.2/5.4-mini/5.4-nano are incompatible with RAGAS 0.4.3 because they require max_completion_tokens instead of max_tokens. gpt-5 / gpt-4.1 support max_tokens and json_object mode required by RAGAS. Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>