OpenAI’s chatbot jolted Silicon Valley when it debuted three years ago, but ChatGPT’s user growth is slowing and Google’s Gemini is gaining ground.

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In terms of accuracy, both tools can occasionally get it wrong. Google’s strength lies in letting users cross-check multiple sources, while ChatGPT’s accuracy depends heavily on the quality of the prompt and the user’s ability to recognize when a response should be verified elsewhere.

1. Run the “Pepsi Challenge.” Paste the same prompt into ChatGPT and Gemini at the same time. Pick the winner and discard the loser. 2. Assign a specific role. Say, “Act like a marketing expert” or “Act like a sympathetic HR manager.” When you give the AI a persona, it changes the vocabulary and tone to fit the job.