DeepSeek V4 Pro
VS
GPT-5.5
DeepSeek V4 Pro vs GPT-5.5: which wins at real work?
22 task areas · same graded test runs · rank comparison only, so 0–100 and Elo collections never mix raw scores.
GPT-5.5 wins 20 of 22 task areas we tested; DeepSeek V4 Pro takes 2. DeepSeek V4 Pro costs 26.8× less per token ($1.305 vs $35 per 1M).
DeepSeek V4 Pro costs 26.8× less per token ($1.305 vs $35 per 1M).
Task by task
| Task area | DeepSeek V4 Pro | GPT-5.5 | Winner |
|---|---|---|---|
| Customer Support |
#52
/ 113
Strong
|
#3
/ 113
Strong
|
GPT-5.5 |
| Creative & Comedy | #50 / 110 | #2 / 110 | GPT-5.5 |
| Summarization & Meeting Notes |
#55
/ 110
Excellent
|
#10
/ 110
Excellent
|
GPT-5.5 |
| Coding |
#43
/ 115
Strong
|
#1
/ 115
Excellent
|
GPT-5.5 |
| Research & Competitive Analysis |
#44
/ 110
Strong
|
#7
/ 110
Excellent
|
GPT-5.5 |
| Legal & HR |
#40
/ 110
Excellent
|
#9
/ 110
Excellent
|
GPT-5.5 |
| Translation & Localization |
#32
/ 110
Excellent
|
#3
/ 110
Excellent
|
GPT-5.5 |
| Chef / Home Cooking |
#32
/ 126
Usable
|
#4
/ 126
Strong
|
GPT-5.5 |
| Presentations & Decks |
#31
/ 110
Excellent
|
#3
/ 110
Excellent
|
GPT-5.5 |
| Executive Assistant |
#38
/ 112
Strong
|
#11
/ 112
Strong
|
GPT-5.5 |
| Content & Brand |
#29
/ 124
Strong
|
#4
/ 124
Strong
|
GPT-5.5 |
| Training & Education |
#41
/ 110
Excellent
|
#63
/ 110
Excellent
|
DeepSeek V4 Pro |
| Knowledge & Docs |
#25
/ 110
Strong
|
#5
/ 110
Excellent
|
GPT-5.5 |
| Structured Output |
#23
/ 113
Excellent
|
#3
/ 113
Excellent
|
GPT-5.5 |
| Investor & Pitch |
#33
/ 66
Strong
|
#16
/ 66
Strong
|
GPT-5.5 |
| Data & Analytics |
#60
/ 110
Excellent
|
#48
/ 110
Excellent
|
GPT-5.5 |
| RAG, Safety & Grounding |
#27
/ 113
Excellent
|
#16
/ 113
Excellent
|
GPT-5.5 |
| Frontend & Landing Pages |
#6
/ 109
Usable
|
#13
/ 109
Needs editing
|
DeepSeek V4 Pro |
| Landing Pages |
#16
/ 72
Strong
|
#9
/ 72
Strong
|
GPT-5.5 |
| AI Strategy |
#68
/ 126
Strong
|
#62
/ 126
Strong
|
GPT-5.5 |
| Product & Project Management |
#12
/ 110
Excellent
|
#8
/ 110
Excellent
|
GPT-5.5 |
| Sales |
#44
/ 110
Usable
|
#42
/ 110
Usable
|
GPT-5.5 |
Rank = position among every model config we tested in that task area (lower is better). Sorted by biggest gap first.
Frequently asked
Is DeepSeek V4 Pro better than GPT-5.5?
Across 22 task areas we benchmarked, GPT-5.5 ranks higher in 20 and DeepSeek V4 Pro in 2.
Which is cheaper, DeepSeek V4 Pro or GPT-5.5?
DeepSeek V4 Pro costs 26.8× less per token ($1.305 vs $35 per 1M).
What is DeepSeek V4 Pro better at?
DeepSeek V4 Pro out-ranks GPT-5.5 at Training & Education, Frontend & Landing Pages.
What is GPT-5.5 better at?
GPT-5.5 out-ranks DeepSeek V4 Pro at Customer Support, Creative & Comedy, Summarization & Meeting Notes.
More comparisons
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Prompt × model results
12 test cases · 3 evals