Claude Haiku 4.5
VS
DeepSeek V3.1 Terminus
Claude Haiku 4.5 vs DeepSeek V3.1 Terminus: 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 Haiku 4.5 wins 12 of 22 task areas we tested; DeepSeek V3.1 Terminus takes 10. DeepSeek V3.1 Terminus costs 4.9× less per token ($1.22 vs $6 per 1M).
DeepSeek V3.1 Terminus costs 4.9× less per token ($1.22 vs $6 per 1M).
Task by task
| Task area | Claude Haiku 4.5 | DeepSeek V3.1 Terminus | Winner |
|---|---|---|---|
| Translation & Localization |
#27
/ 110
Excellent
|
#101
/ 110
Strong
|
Claude Haiku 4.5 |
| Legal & HR |
#48
/ 110
Excellent
|
#95
/ 110
Strong
|
Claude Haiku 4.5 |
| Structured Output |
#109
/ 113
Usable
|
#63
/ 113
Excellent
|
DeepSeek V3.1 Terminus |
| Customer Support |
#99
/ 113
Usable
|
#69
/ 113
Usable
|
DeepSeek V3.1 Terminus |
| Frontend & Landing Pages |
#7
/ 109
Usable
|
#33
/ 109
Needs editing
|
Claude Haiku 4.5 |
| Knowledge & Docs |
#71
/ 110
Usable
|
#50
/ 110
Usable
|
DeepSeek V3.1 Terminus |
| Chef / Home Cooking |
#113
/ 126
Needs editing
|
#95
/ 126
Usable
|
DeepSeek V3.1 Terminus |
| Landing Pages |
#61
/ 72
Usable
|
#44
/ 72
Strong
|
DeepSeek V3.1 Terminus |
| Sales |
#80
/ 110
Usable
|
#97
/ 110
Needs editing
|
Claude Haiku 4.5 |
| Research & Competitive Analysis |
#59
/ 110
Usable
|
#46
/ 110
Strong
|
DeepSeek V3.1 Terminus |
| RAG, Safety & Grounding |
#97
/ 113
Strong
|
#85
/ 113
Excellent
|
DeepSeek V3.1 Terminus |
| Content & Brand |
#89
/ 124
Usable
|
#100
/ 124
Usable
|
Claude Haiku 4.5 |
| AI Strategy |
#91
/ 126
Strong
|
#101
/ 126
Usable
|
Claude Haiku 4.5 |
| Creative & Comedy | #84 / 110 | #89 / 110 | Claude Haiku 4.5 |
| Summarization & Meeting Notes |
#27
/ 110
Excellent
|
#32
/ 110
Excellent
|
Claude Haiku 4.5 |
| Training & Education |
#36
/ 110
Excellent
|
#31
/ 110
Excellent
|
DeepSeek V3.1 Terminus |
| Executive Assistant |
#73
/ 112
Strong
|
#77
/ 112
Usable
|
Claude Haiku 4.5 |
| Data & Analytics |
#53
/ 110
Excellent
|
#56
/ 110
Excellent
|
Claude Haiku 4.5 |
| Presentations & Decks |
#88
/ 110
Strong
|
#91
/ 110
Strong
|
Claude Haiku 4.5 |
| Coding |
#94
/ 115
Usable
|
#92
/ 115
Usable
|
DeepSeek V3.1 Terminus |
| Product & Project Management |
#38
/ 110
Strong
|
#36
/ 110
Strong
|
DeepSeek V3.1 Terminus |
| Investor & Pitch |
#63
/ 66
Needs editing
|
#64
/ 66
Needs editing
|
Claude Haiku 4.5 |
Rank = position among every model config we tested in that task area (lower is better). Sorted by biggest gap first.
Frequently asked
Is Claude Haiku 4.5 better than DeepSeek V3.1 Terminus?
Across 22 task areas we benchmarked, Claude Haiku 4.5 ranks higher in 12 and DeepSeek V3.1 Terminus in 10.
Which is cheaper, Claude Haiku 4.5 or DeepSeek V3.1 Terminus?
DeepSeek V3.1 Terminus costs 4.9× less per token ($1.22 vs $6 per 1M).
What is Claude Haiku 4.5 better at?
Claude Haiku 4.5 out-ranks DeepSeek V3.1 Terminus at Translation & Localization, Legal & HR, Frontend & Landing Pages.
What is DeepSeek V3.1 Terminus better at?
DeepSeek V3.1 Terminus out-ranks Claude Haiku 4.5 at Structured Output, Customer Support, Knowledge & Docs.
More comparisons
This page is Spring Prompt, running in public
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Prompt × model results
12 test cases · 3 evals