Claude Sonnet 4.5
VS
Mistral Medium 3.1
Claude Sonnet 4.5 vs Mistral Medium 3.1: 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 Sonnet 4.5 wins 20 of 22 task areas we tested; Mistral Medium 3.1 takes 2. Mistral Medium 3.1 costs 7.5× less per token ($2.4 vs $18 per 1M).
Mistral Medium 3.1 costs 7.5× less per token ($2.4 vs $18 per 1M).
Task by task
| Task area | Claude Sonnet 4.5 | Mistral Medium 3.1 | Winner |
|---|---|---|---|
| Sales |
#10
/ 110
Strong
|
#92
/ 110
Usable
|
Claude Sonnet 4.5 |
| RAG, Safety & Grounding |
#39
/ 113
Excellent
|
#111
/ 113
Strong
|
Claude Sonnet 4.5 |
| Customer Support |
#43
/ 113
Strong
|
#110
/ 113
Needs editing
|
Claude Sonnet 4.5 |
| Research & Competitive Analysis |
#39
/ 110
Strong
|
#105
/ 110
Weak
|
Claude Sonnet 4.5 |
| Executive Assistant |
#31
/ 112
Strong
|
#94
/ 112
Usable
|
Claude Sonnet 4.5 |
| Presentations & Decks |
#43
/ 110
Excellent
|
#105
/ 110
Usable
|
Claude Sonnet 4.5 |
| Data & Analytics |
#33
/ 110
Excellent
|
#87
/ 110
Excellent
|
Claude Sonnet 4.5 |
| AI Strategy |
#67
/ 126
Strong
|
#120
/ 126
Usable
|
Claude Sonnet 4.5 |
| Knowledge & Docs |
#28
/ 110
Strong
|
#77
/ 110
Usable
|
Claude Sonnet 4.5 |
| Coding |
#62
/ 115
Strong
|
#108
/ 115
Needs editing
|
Claude Sonnet 4.5 |
| Summarization & Meeting Notes |
#2
/ 110
Excellent
|
#39
/ 110
Excellent
|
Claude Sonnet 4.5 |
| Chef / Home Cooking |
#80
/ 126
Usable
|
#116
/ 126
Needs editing
|
Claude Sonnet 4.5 |
| Content & Brand |
#74
/ 124
Usable
|
#110
/ 124
Needs editing
|
Claude Sonnet 4.5 |
| Creative & Comedy | #66 / 110 | #100 / 110 | Claude Sonnet 4.5 |
| Landing Pages |
#30
/ 72
Strong
|
#63
/ 72
Usable
|
Claude Sonnet 4.5 |
| Translation & Localization |
#25
/ 110
Excellent
|
#53
/ 110
Excellent
|
Claude Sonnet 4.5 |
| Investor & Pitch |
#42
/ 66
Usable
|
#65
/ 66
Needs editing
|
Claude Sonnet 4.5 |
| Product & Project Management |
#71
/ 110
Strong
|
#50
/ 110
Strong
|
Mistral Medium 3.1 |
| Structured Output |
#80
/ 113
Strong
|
#91
/ 113
Strong
|
Claude Sonnet 4.5 |
| Frontend & Landing Pages |
#29
/ 109
Needs editing
|
#35
/ 109
Needs editing
|
Claude Sonnet 4.5 |
| Training & Education |
#51
/ 110
Excellent
|
#47
/ 110
Excellent
|
Mistral Medium 3.1 |
| Legal & HR |
#69
/ 110
Strong
|
#70
/ 110
Strong
|
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 Mistral Medium 3.1?
Across 22 task areas we benchmarked, Claude Sonnet 4.5 ranks higher in 20 and Mistral Medium 3.1 in 2.
Which is cheaper, Claude Sonnet 4.5 or Mistral Medium 3.1?
Mistral Medium 3.1 costs 7.5× less per token ($2.4 vs $18 per 1M).
What is Claude Sonnet 4.5 better at?
Claude Sonnet 4.5 out-ranks Mistral Medium 3.1 at Sales, RAG, Safety & Grounding, Customer Support.
What is Mistral Medium 3.1 better at?
Mistral Medium 3.1 out-ranks Claude Sonnet 4.5 at Product & Project Management, Training & Education.
More comparisons
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