Claude Sonnet 4.5
VS
Gemini 3.1 Pro Preview
Claude Sonnet 4.5 vs Gemini 3.1 Pro Preview: 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 3.1 Pro Preview wins 16 of 22 task areas we tested; Claude Sonnet 4.5 takes 6. Gemini 3.1 Pro Preview costs 1.3× less per token ($14 vs $18 per 1M).
Gemini 3.1 Pro Preview costs 1.3× less per token ($14 vs $18 per 1M).
Task by task
| Task area | Claude Sonnet 4.5 | Gemini 3.1 Pro Preview | Winner |
|---|---|---|---|
| Chef / Home Cooking |
#80
/ 126
Usable
|
#6
/ 126
Strong
|
Gemini 3.1 Pro Preview |
| Structured Output |
#80
/ 113
Strong
|
#15
/ 113
Excellent
|
Gemini 3.1 Pro Preview |
| Content & Brand |
#74
/ 124
Usable
|
#11
/ 124
Strong
|
Gemini 3.1 Pro Preview |
| Creative & Comedy | #66 / 110 | #4 / 110 | Gemini 3.1 Pro Preview |
| Legal & HR |
#69
/ 110
Strong
|
#17
/ 110
Excellent
|
Gemini 3.1 Pro Preview |
| Training & Education |
#51
/ 110
Excellent
|
#4
/ 110
Excellent
|
Gemini 3.1 Pro Preview |
| Product & Project Management |
#71
/ 110
Strong
|
#25
/ 110
Excellent
|
Gemini 3.1 Pro Preview |
| Customer Support |
#43
/ 113
Strong
|
#2
/ 113
Strong
|
Gemini 3.1 Pro Preview |
| AI Strategy |
#67
/ 126
Strong
|
#33
/ 126
Strong
|
Gemini 3.1 Pro Preview |
| RAG, Safety & Grounding |
#39
/ 113
Excellent
|
#8
/ 113
Excellent
|
Gemini 3.1 Pro Preview |
| Investor & Pitch |
#42
/ 66
Usable
|
#13
/ 66
Strong
|
Gemini 3.1 Pro Preview |
| Sales |
#10
/ 110
Strong
|
#32
/ 110
Strong
|
Claude Sonnet 4.5 |
| Presentations & Decks |
#43
/ 110
Excellent
|
#24
/ 110
Excellent
|
Gemini 3.1 Pro Preview |
| Executive Assistant |
#31
/ 112
Strong
|
#14
/ 112
Strong
|
Gemini 3.1 Pro Preview |
| Landing Pages |
#30
/ 72
Strong
|
#14
/ 72
Strong
|
Gemini 3.1 Pro Preview |
| Translation & Localization |
#25
/ 110
Excellent
|
#14
/ 110
Excellent
|
Gemini 3.1 Pro Preview |
| Knowledge & Docs |
#28
/ 110
Strong
|
#19
/ 110
Strong
|
Gemini 3.1 Pro Preview |
| Data & Analytics |
#33
/ 110
Excellent
|
#39
/ 110
Excellent
|
Claude Sonnet 4.5 |
| Frontend & Landing Pages |
#29
/ 109
Needs editing
|
#34
/ 109
Needs editing
|
Claude Sonnet 4.5 |
| Research & Competitive Analysis |
#39
/ 110
Strong
|
#42
/ 110
Strong
|
Claude Sonnet 4.5 |
| Coding |
#62
/ 115
Strong
|
#64
/ 115
Strong
|
Claude Sonnet 4.5 |
| Summarization & Meeting Notes |
#2
/ 110
Excellent
|
#4
/ 110
Excellent
|
Claude Sonnet 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 Sonnet 4.5 better than Gemini 3.1 Pro Preview?
Across 22 task areas we benchmarked, Gemini 3.1 Pro Preview ranks higher in 16 and Claude Sonnet 4.5 in 6.
Which is cheaper, Claude Sonnet 4.5 or Gemini 3.1 Pro Preview?
Gemini 3.1 Pro Preview costs 1.3× less per token ($14 vs $18 per 1M).
What is Claude Sonnet 4.5 better at?
Claude Sonnet 4.5 out-ranks Gemini 3.1 Pro Preview at Sales, Data & Analytics, Frontend & Landing Pages.
What is Gemini 3.1 Pro Preview better at?
Gemini 3.1 Pro Preview out-ranks Claude Sonnet 4.5 at Chef / Home Cooking, Structured Output, Content & Brand.
More comparisons
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