Claude Sonnet 5
VS
DeepSeek V4 Pro
Claude Sonnet 5 vs DeepSeek V4 Pro: 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.
DeepSeek V4 Pro wins 13 of 22 task areas we tested; Claude Sonnet 5 takes 9. DeepSeek V4 Pro costs 9.2× less per token ($1.305 vs $12 per 1M).
DeepSeek V4 Pro costs 9.2× less per token ($1.305 vs $12 per 1M).
Task by task
| Task area | Claude Sonnet 5 | DeepSeek V4 Pro | Winner |
|---|---|---|---|
| AI Strategy |
#2
/ 126
Strong
|
#68
/ 126
Strong
|
Claude Sonnet 5 |
| RAG, Safety & Grounding |
#86
/ 113
Excellent
|
#27
/ 113
Excellent
|
DeepSeek V4 Pro |
| Frontend & Landing Pages |
#57
/ 109
Needs editing
|
#6
/ 109
Usable
|
DeepSeek V4 Pro |
| Product & Project Management |
#61
/ 110
Strong
|
#12
/ 110
Excellent
|
DeepSeek V4 Pro |
| Structured Output |
#69
/ 113
Strong
|
#23
/ 113
Excellent
|
DeepSeek V4 Pro |
| Data & Analytics |
#16
/ 110
Excellent
|
#60
/ 110
Excellent
|
Claude Sonnet 5 |
| Content & Brand |
#67
/ 124
Strong
|
#29
/ 124
Strong
|
DeepSeek V4 Pro |
| Coding |
#6
/ 115
Excellent
|
#43
/ 115
Strong
|
Claude Sonnet 5 |
| Executive Assistant |
#72
/ 112
Strong
|
#38
/ 112
Strong
|
DeepSeek V4 Pro |
| Creative & Comedy | #79 / 110 | #50 / 110 | DeepSeek V4 Pro |
| Research & Competitive Analysis |
#15
/ 110
Excellent
|
#44
/ 110
Strong
|
Claude Sonnet 5 |
| Sales |
#16
/ 110
Strong
|
#44
/ 110
Usable
|
Claude Sonnet 5 |
| Legal & HR |
#57
/ 110
Excellent
|
#40
/ 110
Excellent
|
DeepSeek V4 Pro |
| Training & Education |
#52
/ 110
Excellent
|
#41
/ 110
Excellent
|
DeepSeek V4 Pro |
| Presentations & Decks |
#22
/ 110
Excellent
|
#31
/ 110
Excellent
|
Claude Sonnet 5 |
| Translation & Localization |
#41
/ 110
Excellent
|
#32
/ 110
Excellent
|
DeepSeek V4 Pro |
| Knowledge & Docs |
#18
/ 110
Strong
|
#25
/ 110
Strong
|
Claude Sonnet 5 |
| Investor & Pitch |
#39
/ 66
Usable
|
#33
/ 66
Strong
|
DeepSeek V4 Pro |
| Customer Support |
#57
/ 113
Strong
|
#52
/ 113
Strong
|
DeepSeek V4 Pro |
| Chef / Home Cooking |
#28
/ 126
Usable
|
#32
/ 126
Usable
|
Claude Sonnet 5 |
| Landing Pages |
#12
/ 72
Strong
|
#16
/ 72
Strong
|
Claude Sonnet 5 |
| Summarization & Meeting Notes |
#58
/ 110
Excellent
|
#55
/ 110
Excellent
|
DeepSeek V4 Pro |
Rank = position among every model config we tested in that task area (lower is better). Sorted by biggest gap first.
Frequently asked
Is Claude Sonnet 5 better than DeepSeek V4 Pro?
Across 22 task areas we benchmarked, DeepSeek V4 Pro ranks higher in 13 and Claude Sonnet 5 in 9.
Which is cheaper, Claude Sonnet 5 or DeepSeek V4 Pro?
DeepSeek V4 Pro costs 9.2× less per token ($1.305 vs $12 per 1M).
What is Claude Sonnet 5 better at?
Claude Sonnet 5 out-ranks DeepSeek V4 Pro at AI Strategy, Data & Analytics, Coding.
What is DeepSeek V4 Pro better at?
DeepSeek V4 Pro out-ranks Claude Sonnet 5 at RAG, Safety & Grounding, Frontend & Landing Pages, Product & Project Management.
More comparisons
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Prompt × model results
12 test cases · 3 evals