Gemini 3.5 Flash
VS
GPT-5 Mini
Gemini 3.5 Flash vs GPT-5 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 15 of 22 task areas we tested; GPT-5 Mini takes 7. GPT-5 Mini costs 4.7× less per token ($2.25 vs $10.5 per 1M).
GPT-5 Mini costs 4.7× less per token ($2.25 vs $10.5 per 1M).
Task by task
| Task area | Gemini 3.5 Flash | GPT-5 Mini | Winner |
|---|---|---|---|
| Customer Support |
#12
/ 113
Strong
|
#104
/ 113
Usable
|
Gemini 3.5 Flash |
| Executive Assistant |
#19
/ 112
Strong
|
#108
/ 112
Usable
|
Gemini 3.5 Flash |
| AI Strategy |
#23
/ 126
Strong
|
#100
/ 126
Usable
|
Gemini 3.5 Flash |
| Training & Education |
#7
/ 110
Excellent
|
#81
/ 110
Strong
|
Gemini 3.5 Flash |
| Sales |
#33
/ 110
Strong
|
#102
/ 110
Needs editing
|
Gemini 3.5 Flash |
| Summarization & Meeting Notes |
#17
/ 110
Excellent
|
#81
/ 110
Excellent
|
Gemini 3.5 Flash |
| Legal & HR |
#73
/ 110
Strong
|
#10
/ 110
Excellent
|
GPT-5 Mini |
| RAG, Safety & Grounding |
#15
/ 113
Excellent
|
#78
/ 113
Excellent
|
Gemini 3.5 Flash |
| Research & Competitive Analysis |
#65
/ 110
Usable
|
#21
/ 110
Excellent
|
GPT-5 Mini |
| Creative & Comedy | #27 / 110 | #70 / 110 | Gemini 3.5 Flash |
| Product & Project Management |
#33
/ 110
Strong
|
#1
/ 110
Excellent
|
GPT-5 Mini |
| Content & Brand |
#46
/ 124
Strong
|
#69
/ 124
Strong
|
Gemini 3.5 Flash |
| Presentations & Decks |
#17
/ 110
Excellent
|
#39
/ 110
Excellent
|
Gemini 3.5 Flash |
| Translation & Localization |
#30
/ 110
Excellent
|
#52
/ 110
Excellent
|
Gemini 3.5 Flash |
| Chef / Home Cooking |
#24
/ 126
Usable
|
#45
/ 126
Usable
|
Gemini 3.5 Flash |
| Structured Output |
#35
/ 113
Excellent
|
#17
/ 113
Excellent
|
GPT-5 Mini |
| Landing Pages |
#40
/ 72
Strong
|
#50
/ 72
Usable
|
Gemini 3.5 Flash |
| Coding |
#28
/ 115
Strong
|
#37
/ 115
Strong
|
Gemini 3.5 Flash |
| Frontend & Landing Pages |
#4
/ 109
Usable
|
#12
/ 109
Needs editing
|
Gemini 3.5 Flash |
| Data & Analytics |
#34
/ 110
Excellent
|
#27
/ 110
Excellent
|
GPT-5 Mini |
| Investor & Pitch |
#56
/ 66
Usable
|
#50
/ 66
Usable
|
GPT-5 Mini |
| Knowledge & Docs |
#44
/ 110
Strong
|
#41
/ 110
Strong
|
GPT-5 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 Mini?
Across 22 task areas we benchmarked, Gemini 3.5 Flash ranks higher in 15 and GPT-5 Mini in 7.
Which is cheaper, Gemini 3.5 Flash or GPT-5 Mini?
GPT-5 Mini costs 4.7× less per token ($2.25 vs $10.5 per 1M).
What is Gemini 3.5 Flash better at?
Gemini 3.5 Flash out-ranks GPT-5 Mini at Customer Support, Executive Assistant, AI Strategy.
What is GPT-5 Mini better at?
GPT-5 Mini out-ranks Gemini 3.5 Flash at Legal & HR, Research & Competitive Analysis, Product & Project Management.
More comparisons
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Prompt × model results
12 test cases · 3 evals