Symptom question prompt
A copy-and-paste prompt for ChatGPT, Claude or Gemini that gets a professional symptom question on the first try, plus the cheapest model that does it well.
What most people type
I've had a headache for 3 days that gets worse when I stand up, what could it be?
It works, but the AI has to guess your age, current medications and existing conditions, so the first answer usually needs another round. The version below asks for exactly what a professional would deliver.
The better prompt
I've had a headache for 3 days that gets worse when I stand up and eases when I lie down. List the most likely causes, from most to least common, with a one-line explanation of each. Then tell me which warning signs mean I should get urgent or emergency care, and what to tell a doctor or what tests they might do. Keep it general and educational, not a diagnosis. Context I can add if useful: [age], [recent events such as a spinal procedure, head injury, illness, or dehydration], [other symptoms such as fever, stiff neck, vision changes, nausea, or neck pain], [current medications], [existing conditions].
Replace the [brackets] with your details before you send it: age, current medications, existing conditions.
What a professional symptom question prompt covers
- Asks for possible causes and red-flag symptoms
- Asks when to seek urgent care
- Relevant details placeholders like age, other symptoms, recent procedures
Watch out for
- Drops the symptom details
Best AI model for this prompt
This is a everyday task. You don't need the most expensive model. The cheapest model at each company that handles it well:
| Company | Model | Per use | Per 1,000 uses |
|---|---|---|---|
| Anthropic | Claude Sonnet 5.5 | $0.0043 | $4.27 |
| OpenAI | GPT-6.1 Terra | $0.0021 | $2.14 |
| Gemini 3.8 Flashcheapest | $0.0016 | $1.60 |
Pay-per-use list prices for this prompt and its expected answer (about 400 tokens). On a monthly chat plan, the same choice shows up as more messages before you hit your limit. See today's AI prices.