Claude Sonnet 4.6
VS
DeepSeek V4 Pro
Claude Sonnet 4.6 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.
Claude Sonnet 4.6 wins 14 of 22 task areas we tested; DeepSeek V4 Pro takes 8. DeepSeek V4 Pro costs 13.8× less per token ($1.305 vs $18 per 1M).
DeepSeek V4 Pro costs 13.8× less per token ($1.305 vs $18 per 1M).
Task by task
| Task area | Claude Sonnet 4.6 | DeepSeek V4 Pro | Winner |
|---|---|---|---|
| Structured Output |
#105
/ 113
Usable
|
#23
/ 113
Excellent
|
DeepSeek V4 Pro |
| AI Strategy |
#3
/ 126
Strong
|
#68
/ 126
Strong
|
Claude Sonnet 4.6 |
| Data & Analytics |
#6
/ 110
Excellent
|
#60
/ 110
Excellent
|
Claude Sonnet 4.6 |
| RAG, Safety & Grounding |
#73
/ 113
Excellent
|
#27
/ 113
Excellent
|
DeepSeek V4 Pro |
| Executive Assistant |
#1
/ 112
Strong
|
#38
/ 112
Strong
|
Claude Sonnet 4.6 |
| Legal & HR |
#3
/ 110
Excellent
|
#40
/ 110
Excellent
|
Claude Sonnet 4.6 |
| Product & Project Management |
#48
/ 110
Strong
|
#12
/ 110
Excellent
|
DeepSeek V4 Pro |
| Training & Education |
#9
/ 110
Excellent
|
#41
/ 110
Excellent
|
Claude Sonnet 4.6 |
| Creative & Comedy | #19 / 110 | #50 / 110 | Claude Sonnet 4.6 |
| Sales |
#13
/ 110
Strong
|
#44
/ 110
Usable
|
Claude Sonnet 4.6 |
| Investor & Pitch |
#4
/ 66
Strong
|
#33
/ 66
Strong
|
Claude Sonnet 4.6 |
| Translation & Localization |
#13
/ 110
Excellent
|
#32
/ 110
Excellent
|
Claude Sonnet 4.6 |
| Summarization & Meeting Notes |
#37
/ 110
Excellent
|
#55
/ 110
Excellent
|
Claude Sonnet 4.6 |
| Frontend & Landing Pages |
#23
/ 109
Needs editing
|
#6
/ 109
Usable
|
DeepSeek V4 Pro |
| Coding |
#29
/ 115
Strong
|
#43
/ 115
Strong
|
Claude Sonnet 4.6 |
| Chef / Home Cooking |
#20
/ 126
Usable
|
#32
/ 126
Usable
|
Claude Sonnet 4.6 |
| Landing Pages |
#5
/ 72
Strong
|
#16
/ 72
Strong
|
Claude Sonnet 4.6 |
| Customer Support |
#62
/ 113
Strong
|
#52
/ 113
Strong
|
DeepSeek V4 Pro |
| Knowledge & Docs |
#35
/ 110
Strong
|
#25
/ 110
Strong
|
DeepSeek V4 Pro |
| Research & Competitive Analysis |
#35
/ 110
Strong
|
#44
/ 110
Strong
|
Claude Sonnet 4.6 |
| Presentations & Decks |
#35
/ 110
Excellent
|
#31
/ 110
Excellent
|
DeepSeek V4 Pro |
| Content & Brand |
#31
/ 124
Strong
|
#29
/ 124
Strong
|
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 4.6 better than DeepSeek V4 Pro?
Across 22 task areas we benchmarked, Claude Sonnet 4.6 ranks higher in 14 and DeepSeek V4 Pro in 8.
Which is cheaper, Claude Sonnet 4.6 or DeepSeek V4 Pro?
DeepSeek V4 Pro costs 13.8× less per token ($1.305 vs $18 per 1M).
What is Claude Sonnet 4.6 better at?
Claude Sonnet 4.6 out-ranks DeepSeek V4 Pro at AI Strategy, Data & Analytics, Executive Assistant.
What is DeepSeek V4 Pro better at?
DeepSeek V4 Pro out-ranks Claude Sonnet 4.6 at Structured Output, RAG, Safety & Grounding, Product & Project Management.
More comparisons
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Prompt × model results
12 test cases · 3 evals