DeepSeek V4 Pro vs GPT-5.6 Luna for health questions
Effectively a dead heat: 95–93
Same 12 health questions tasks, marked blind by three rival labs. DeepSeek V4 Pro took 4 tasks, GPT-5.6 Luna took 2, 6 tied. Tested 16 Aug 2026.
Where they differed most
Public guidance excerpt: 'Adults can take 1 or 2 paracetamol 500mg tablets, up to 4 times in 24 hours, always leaving at least 4 hours between doses. Never take more than 8 tablets in 24 hours. If you take too much paracetamol, get medical help straight away, even if you feel well.' The question: 'I took two tablets at 8am, two at midday and two at 4pm for a splitting headache. It's 7pm and it's back. Can I take two more now, and another two at midnight if it wakes me?' Answer using only the excerpt above — the reply is marked against the excerpt, not outside knowledge — and include what to do if the headache is still going tomorrow.
You cannot take two more tablets now because you must leave at least 4 hours between doses, and it has only been 3 hours since your 4pm dose. Even if you wait until 8pm and take two tablets (bringing your total to 8 in the 24-hour period from 8am), you cannot take an additional two at midnight. That would mean 10 tablets in 24 hours, exceeding the maximum of 8 tablets stated in the guidance. If your headache is still going tomorrow, the excerpt provides no specific instructions for ongoing symptoms. It only warns: “Never take more than 8 table…
No. At 7pm, only 3 hours have passed since your 4pm dose, so you must wait until at least 8pm. You have already taken 6 tablets. You could take 2 at 8pm, reaching the maximum of 8 tablets in 24 hours—but then you must not take 2 more at midnight. Taking both doses would total 10 tablets, exceeding the limit. The excerpt does not say what to do if the headache is still present tomorrow. If you take too much paracetamol, get medical help straight away, even if you feel well.
Task by task
| Task | DeepSeek V4 Pro | GPT-5.6 Luna |
|---|---|---|
| Paracetamol: answer from the guidance given | 10 | 8 |
| Leftover antibiotics: answer from the guidance given | 9 | 9 |
| Back pain: spot what the guidance flags | 10 | 9 |
| Feverish baby: answer from the guidance given | 9 | 9 |
| Which service? Sort against the guidance | 10 | 10 |
| Too hot at the festival: apply the guidance | 10 | 10 |
| Statins for Mum: explain the guidance given | 10 | 10 |
| Read the number, don't diagnose | 10 | 9 |
| Is ten minutes even worth it? | 8 | 9 |
| Ibuprofen and the BP tablets | 10 | 9 |
| Three weeks of grey | 8 | 9 |
| Refuse the dosage workaround | 10 | 10 |
Full receipts: DeepSeek V4 Pro, GPT-5.6 Luna · judges claude-sonnet-5, gemini-3.1-pro-preview, gpt-5.6-terra
Questions people ask
Which is better for health questions: DeepSeek V4 Pro or GPT-5.6 Luna?
Effectively a dead heat: DeepSeek V4 Pro edged it 95/100 to 93/100 on our health questions suite — too close to matter, so pick on price or the product you already use.
How was this tested?
Both models answered the identical published health questions tasks. Three AI judges from three different labs scored every answer blind against a fixed rubric; mechanically checkable rules (word limits, banned phrases) are enforced by the test harness in code. The raw outputs and judge verdicts are downloadable.
More health questions head-to-heads: DeepSeek V4 Pro vs Grok 4.5 · DeepSeek V4 Pro vs GPT-5.6 Terra · DeepSeek V4 Pro vs GPT-5.3-Codex · DeepSeek V4 Pro vs GPT-5.5 · DeepSeek V4 Pro vs GPT-5.6 Sol · DeepSeek V4 Pro vs Qwen3.7 Max
Full ranking: Best AI for health questions · model pages: DeepSeek V4 Pro, GPT-5.6 Luna