Claude Opus 4.5
VS
DeepSeek V3.1 Terminus
Claude Opus 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 Opus 4.5 wins 20 of 22 task areas we tested; DeepSeek V3.1 Terminus takes 2. DeepSeek V3.1 Terminus costs 24.6× less per token ($1.22 vs $30 per 1M).
DeepSeek V3.1 Terminus costs 24.6× less per token ($1.22 vs $30 per 1M).
Task by task
| Task area | Claude Opus 4.5 | DeepSeek V3.1 Terminus | Winner |
|---|---|---|---|
| Translation & Localization |
#5
/ 110
Excellent
|
#101
/ 110
Strong
|
Claude Opus 4.5 |
| Sales |
#3
/ 110
Strong
|
#97
/ 110
Needs editing
|
Claude Opus 4.5 |
| AI Strategy |
#16
/ 126
Strong
|
#101
/ 126
Usable
|
Claude Opus 4.5 |
| Chef / Home Cooking |
#14
/ 126
Strong
|
#95
/ 126
Usable
|
Claude Opus 4.5 |
| Creative & Comedy | #8 / 110 | #89 / 110 | Claude Opus 4.5 |
| Content & Brand |
#21
/ 124
Strong
|
#100
/ 124
Usable
|
Claude Opus 4.5 |
| Executive Assistant |
#4
/ 112
Strong
|
#77
/ 112
Usable
|
Claude Opus 4.5 |
| Legal & HR |
#30
/ 110
Excellent
|
#95
/ 110
Strong
|
Claude Opus 4.5 |
| Investor & Pitch |
#10
/ 66
Strong
|
#64
/ 66
Needs editing
|
Claude Opus 4.5 |
| Coding |
#39
/ 115
Strong
|
#92
/ 115
Usable
|
Claude Opus 4.5 |
| Data & Analytics |
#9
/ 110
Excellent
|
#56
/ 110
Excellent
|
Claude Opus 4.5 |
| Presentations & Decks |
#45
/ 110
Excellent
|
#91
/ 110
Strong
|
Claude Opus 4.5 |
| Landing Pages |
#7
/ 72
Strong
|
#44
/ 72
Strong
|
Claude Opus 4.5 |
| RAG, Safety & Grounding |
#52
/ 113
Excellent
|
#85
/ 113
Excellent
|
Claude Opus 4.5 |
| Frontend & Landing Pages |
#2
/ 109
Usable
|
#33
/ 109
Needs editing
|
Claude Opus 4.5 |
| Summarization & Meeting Notes |
#1
/ 110
Excellent
|
#32
/ 110
Excellent
|
Claude Opus 4.5 |
| Research & Competitive Analysis |
#17
/ 110
Excellent
|
#46
/ 110
Strong
|
Claude Opus 4.5 |
| Product & Project Management |
#60
/ 110
Strong
|
#36
/ 110
Strong
|
DeepSeek V3.1 Terminus |
| Structured Output |
#82
/ 113
Strong
|
#63
/ 113
Excellent
|
DeepSeek V3.1 Terminus |
| Customer Support |
#56
/ 113
Strong
|
#69
/ 113
Usable
|
Claude Opus 4.5 |
| Training & Education |
#24
/ 110
Excellent
|
#31
/ 110
Excellent
|
Claude Opus 4.5 |
| Knowledge & Docs |
#47
/ 110
Strong
|
#50
/ 110
Usable
|
Claude Opus 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 Opus 4.5 better than DeepSeek V3.1 Terminus?
Across 22 task areas we benchmarked, Claude Opus 4.5 ranks higher in 20 and DeepSeek V3.1 Terminus in 2.
Which is cheaper, Claude Opus 4.5 or DeepSeek V3.1 Terminus?
DeepSeek V3.1 Terminus costs 24.6× less per token ($1.22 vs $30 per 1M).
What is Claude Opus 4.5 better at?
Claude Opus 4.5 out-ranks DeepSeek V3.1 Terminus at Translation & Localization, Sales, AI Strategy.
What is DeepSeek V3.1 Terminus better at?
DeepSeek V3.1 Terminus out-ranks Claude Opus 4.5 at Product & Project Management, Structured Output.
More comparisons
This page is Spring Prompt, running in public
We just did this for every model. Do it for your prompt.
The rankings above come from running real tasks through real models and scoring every output. Spring Prompt is that same engine — pointed at your prompt, your test cases, and your definition of good.
- Generate test cases from your prompt — no eval set required to start.
- Compare models side by side with quality, cost and latency in one matrix.
- Optimise the winner until the scores say it's ready to ship.
Prompt × model results
12 test cases · 3 evals