DeepSeek V4 Pro vs GPT-5.6 Sol for research skills

Ranking from most to least trustworthy:

1. **(a) 2022 systematic review of 17 trials in a peer-reviewed journal** — highest-quality evidence because it synthesises multiple controlled trials and has independent peer review.  
2. **(e) NHS page on back pain last reviewed 2024** — authoritative and current, but likely general back-pain guidance rather than a focused evaluation of standing desks.  
3. **(d) 2015 trial with 24 office workers** — direct experimental evidence, but small, dated, and limited by sample size.  
4. **(b) standing-desk ma…

1. **(a) 2022 systematic review of 17 trials** — Most trustworthy because it synthesizes multiple controlled studies, is peer-reviewed, and reduces reliance on any single small result, assuming sound methods and low publication bias.  
2. **(e) NHS back-pain page, reviewed in 2024** — Current, expert-reviewed public-health guidance with little commercial incentive, though it may not evaluate standing desks specifically or present primary evidence.  
3. **(d) 2015 trial with 24 office workers** — Direct experimental evidence, but the very small…