DeepSeek V3.1 Terminus
VS
Gemini 3.5 Flash
DeepSeek V3.1 Terminus vs Gemini 3.5 Flash: 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.
Gemini 3.5 Flash wins 21 of 22 task areas we tested; DeepSeek V3.1 Terminus takes 1. DeepSeek V3.1 Terminus costs 8.6× less per token ($1.22 vs $10.5 per 1M).
DeepSeek V3.1 Terminus costs 8.6× less per token ($1.22 vs $10.5 per 1M).
Task by task
| Task area | DeepSeek V3.1 Terminus | Gemini 3.5 Flash | Winner |
|---|---|---|---|
| AI Strategy |
#101
/ 126
Usable
|
#23
/ 126
Strong
|
Gemini 3.5 Flash |
| Presentations & Decks |
#91
/ 110
Strong
|
#17
/ 110
Excellent
|
Gemini 3.5 Flash |
| Chef / Home Cooking |
#95
/ 126
Usable
|
#24
/ 126
Usable
|
Gemini 3.5 Flash |
| Translation & Localization |
#101
/ 110
Strong
|
#30
/ 110
Excellent
|
Gemini 3.5 Flash |
| RAG, Safety & Grounding |
#85
/ 113
Excellent
|
#15
/ 113
Excellent
|
Gemini 3.5 Flash |
| Coding |
#92
/ 115
Usable
|
#28
/ 115
Strong
|
Gemini 3.5 Flash |
| Sales |
#97
/ 110
Needs editing
|
#33
/ 110
Strong
|
Gemini 3.5 Flash |
| Creative & Comedy | #89 / 110 | #27 / 110 | Gemini 3.5 Flash |
| Executive Assistant |
#77
/ 112
Usable
|
#19
/ 112
Strong
|
Gemini 3.5 Flash |
| Customer Support |
#69
/ 113
Usable
|
#12
/ 113
Strong
|
Gemini 3.5 Flash |
| Content & Brand |
#100
/ 124
Usable
|
#46
/ 124
Strong
|
Gemini 3.5 Flash |
| Frontend & Landing Pages |
#33
/ 109
Needs editing
|
#4
/ 109
Usable
|
Gemini 3.5 Flash |
| Structured Output |
#63
/ 113
Excellent
|
#35
/ 113
Excellent
|
Gemini 3.5 Flash |
| Training & Education |
#31
/ 110
Excellent
|
#7
/ 110
Excellent
|
Gemini 3.5 Flash |
| Data & Analytics |
#56
/ 110
Excellent
|
#34
/ 110
Excellent
|
Gemini 3.5 Flash |
| Legal & HR |
#95
/ 110
Strong
|
#73
/ 110
Strong
|
Gemini 3.5 Flash |
| Research & Competitive Analysis |
#46
/ 110
Strong
|
#65
/ 110
Usable
|
DeepSeek V3.1 Terminus |
| Summarization & Meeting Notes |
#32
/ 110
Excellent
|
#17
/ 110
Excellent
|
Gemini 3.5 Flash |
| Investor & Pitch |
#64
/ 66
Needs editing
|
#56
/ 66
Usable
|
Gemini 3.5 Flash |
| Knowledge & Docs |
#50
/ 110
Usable
|
#44
/ 110
Strong
|
Gemini 3.5 Flash |
| Landing Pages |
#44
/ 72
Strong
|
#40
/ 72
Strong
|
Gemini 3.5 Flash |
| Product & Project Management |
#36
/ 110
Strong
|
#33
/ 110
Strong
|
Gemini 3.5 Flash |
Rank = position among every model config we tested in that task area (lower is better). Sorted by biggest gap first.
Frequently asked
Is DeepSeek V3.1 Terminus better than Gemini 3.5 Flash?
Across 22 task areas we benchmarked, Gemini 3.5 Flash ranks higher in 21 and DeepSeek V3.1 Terminus in 1.
Which is cheaper, DeepSeek V3.1 Terminus or Gemini 3.5 Flash?
DeepSeek V3.1 Terminus costs 8.6× less per token ($1.22 vs $10.5 per 1M).
What is DeepSeek V3.1 Terminus better at?
DeepSeek V3.1 Terminus out-ranks Gemini 3.5 Flash at Research & Competitive Analysis.
What is Gemini 3.5 Flash better at?
Gemini 3.5 Flash out-ranks DeepSeek V3.1 Terminus at AI Strategy, Presentations & Decks, Chef / Home Cooking.
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.
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- 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