Gemini 3.5 Flash
VS
GPT-5.4 Mini
Gemini 3.5 Flash vs GPT-5.4 Mini: 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 13 of 22 task areas we tested; GPT-5.4 Mini takes 9. GPT-5.4 Mini costs 2.0× less per token ($5.25 vs $10.5 per 1M).
GPT-5.4 Mini costs 2.0× less per token ($5.25 vs $10.5 per 1M).
Task by task
| Task area | Gemini 3.5 Flash | GPT-5.4 Mini | Winner |
|---|---|---|---|
| Training & Education |
#7
/ 110
Excellent
|
#79
/ 110
Strong
|
Gemini 3.5 Flash |
| Executive Assistant |
#19
/ 112
Strong
|
#87
/ 112
Usable
|
Gemini 3.5 Flash |
| Chef / Home Cooking |
#24
/ 126
Usable
|
#83
/ 126
Usable
|
Gemini 3.5 Flash |
| Research & Competitive Analysis |
#65
/ 110
Usable
|
#11
/ 110
Excellent
|
GPT-5.4 Mini |
| Legal & HR |
#73
/ 110
Strong
|
#26
/ 110
Excellent
|
GPT-5.4 Mini |
| Knowledge & Docs |
#44
/ 110
Strong
|
#3
/ 110
Excellent
|
GPT-5.4 Mini |
| Content & Brand |
#46
/ 124
Strong
|
#84
/ 124
Usable
|
Gemini 3.5 Flash |
| Frontend & Landing Pages |
#4
/ 109
Usable
|
#38
/ 109
Needs editing
|
Gemini 3.5 Flash |
| Structured Output |
#35
/ 113
Excellent
|
#1
/ 113
Excellent
|
GPT-5.4 Mini |
| Data & Analytics |
#34
/ 110
Excellent
|
#65
/ 110
Excellent
|
Gemini 3.5 Flash |
| Creative & Comedy | #27 / 110 | #56 / 110 | Gemini 3.5 Flash |
| RAG, Safety & Grounding |
#15
/ 113
Excellent
|
#42
/ 113
Excellent
|
Gemini 3.5 Flash |
| AI Strategy |
#23
/ 126
Strong
|
#48
/ 126
Strong
|
Gemini 3.5 Flash |
| Product & Project Management |
#33
/ 110
Strong
|
#19
/ 110
Excellent
|
GPT-5.4 Mini |
| Customer Support |
#12
/ 113
Strong
|
#21
/ 113
Strong
|
Gemini 3.5 Flash |
| Translation & Localization |
#30
/ 110
Excellent
|
#21
/ 110
Excellent
|
GPT-5.4 Mini |
| Sales |
#33
/ 110
Strong
|
#40
/ 110
Usable
|
Gemini 3.5 Flash |
| Landing Pages |
#40
/ 72
Strong
|
#45
/ 72
Usable
|
Gemini 3.5 Flash |
| Coding |
#28
/ 115
Strong
|
#24
/ 115
Strong
|
GPT-5.4 Mini |
| Investor & Pitch |
#56
/ 66
Usable
|
#52
/ 66
Usable
|
GPT-5.4 Mini |
| Summarization & Meeting Notes |
#17
/ 110
Excellent
|
#19
/ 110
Excellent
|
Gemini 3.5 Flash |
| Presentations & Decks |
#17
/ 110
Excellent
|
#16
/ 110
Excellent
|
GPT-5.4 Mini |
Rank = position among every model config we tested in that task area (lower is better). Sorted by biggest gap first.
Frequently asked
Is Gemini 3.5 Flash better than GPT-5.4 Mini?
Across 22 task areas we benchmarked, Gemini 3.5 Flash ranks higher in 13 and GPT-5.4 Mini in 9.
Which is cheaper, Gemini 3.5 Flash or GPT-5.4 Mini?
GPT-5.4 Mini costs 2.0× less per token ($5.25 vs $10.5 per 1M).
What is Gemini 3.5 Flash better at?
Gemini 3.5 Flash out-ranks GPT-5.4 Mini at Training & Education, Executive Assistant, Chef / Home Cooking.
What is GPT-5.4 Mini better at?
GPT-5.4 Mini out-ranks Gemini 3.5 Flash at Research & Competitive Analysis, Legal & HR, Knowledge & Docs.
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