Gemini vs GPT for SOPs: Which Model Writes Better Documentation?

Across 30 SOP tasks (drafting, gap-finding, translation, compliance sweep), Claude 4.5 wins on structure preservation, GPT-5 wins on natural tone and tool-calling accuracy, and Gemini 2.5 wins on speed and cost. All three hallucinate specific tool click-paths, so none replaces a real capture tool like [Haiku](/reviews/haiku) or [Scribe](/reviews/scribe). For most teams, the model choice matters less than the workflow — capture with a tool, refine with whichever LLM you already pay for. See our [ChatGPT SOP prompts](/blog/chatgpt-sop-prompts) for prompts that work across all three.