Claude Opus 4.8
VS
Mistral Medium 3.1
Claude Opus 4.8 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 Opus 4.8 wins 22 of 22 task areas we tested; Mistral Medium 3.1 takes 0. Mistral Medium 3.1 costs 12.5× less per token ($2.4 vs $30 per 1M).
Mistral Medium 3.1 costs 12.5× less per token ($2.4 vs $30 per 1M).
Task by task
| Task area | Claude Opus 4.8 | Mistral Medium 3.1 | Winner |
|---|---|---|---|
| AI Strategy |
#4
/ 126
Strong
|
#120
/ 126
Usable
|
Claude Opus 4.8 |
| Chef / Home Cooking |
#9
/ 126
Strong
|
#116
/ 126
Needs editing
|
Claude Opus 4.8 |
| Coding |
#3
/ 115
Excellent
|
#108
/ 115
Needs editing
|
Claude Opus 4.8 |
| Content & Brand |
#8
/ 124
Strong
|
#110
/ 124
Needs editing
|
Claude Opus 4.8 |
| Customer Support |
#8
/ 113
Strong
|
#110
/ 113
Needs editing
|
Claude Opus 4.8 |
| RAG, Safety & Grounding |
#11
/ 113
Excellent
|
#111
/ 113
Strong
|
Claude Opus 4.8 |
| Research & Competitive Analysis |
#5
/ 110
Excellent
|
#105
/ 110
Weak
|
Claude Opus 4.8 |
| Sales |
#1
/ 110
Strong
|
#92
/ 110
Usable
|
Claude Opus 4.8 |
| Data & Analytics |
#2
/ 110
Excellent
|
#87
/ 110
Excellent
|
Claude Opus 4.8 |
| Executive Assistant |
#9
/ 112
Strong
|
#94
/ 112
Usable
|
Claude Opus 4.8 |
| Creative & Comedy | #17 / 110 | #100 / 110 | Claude Opus 4.8 |
| Knowledge & Docs |
#2
/ 110
Excellent
|
#77
/ 110
Usable
|
Claude Opus 4.8 |
| Presentations & Decks |
#32
/ 110
Excellent
|
#105
/ 110
Usable
|
Claude Opus 4.8 |
| Legal & HR |
#5
/ 110
Excellent
|
#70
/ 110
Strong
|
Claude Opus 4.8 |
| Product & Project Management |
#2
/ 110
Excellent
|
#50
/ 110
Strong
|
Claude Opus 4.8 |
| Landing Pages |
#18
/ 72
Strong
|
#63
/ 72
Usable
|
Claude Opus 4.8 |
| Training & Education |
#2
/ 110
Excellent
|
#47
/ 110
Excellent
|
Claude Opus 4.8 |
| Investor & Pitch |
#27
/ 66
Strong
|
#65
/ 66
Needs editing
|
Claude Opus 4.8 |
| Structured Output |
#61
/ 113
Excellent
|
#91
/ 113
Strong
|
Claude Opus 4.8 |
| Translation & Localization |
#35
/ 110
Excellent
|
#53
/ 110
Excellent
|
Claude Opus 4.8 |
| Frontend & Landing Pages |
#21
/ 109
Needs editing
|
#35
/ 109
Needs editing
|
Claude Opus 4.8 |
| Summarization & Meeting Notes |
#35
/ 110
Excellent
|
#39
/ 110
Excellent
|
Claude Opus 4.8 |
Rank = position among every model config we tested in that task area (lower is better). Sorted by biggest gap first.
Same task, both models — judged
Both models answered the same test case; an independent judge graded each. Quotes are the judge's actual rationale.
Customer Support
Missing feature complaint (Escalation and Incident Test)
“The response is expert-level and production-ready. It perfectly balances transparency about the missing feature with proactive, concrete workarounds, while handling the churn risk with excellent empathy and professionalism.”
“The model successfully incorporates the provided workarounds and handles the feature timeline honestly. However, it critically fails by inventing an offer to adjust the customer's contract terms, which is a major business risk and violates the negative constraint against inventing commitments. Furthermore, the inclusion of meta-commentary makes the output not ready to use.”
Frequently asked
Is Claude Opus 4.8 better than Mistral Medium 3.1?
Across 22 task areas we benchmarked, Claude Opus 4.8 ranks higher in 22 and Mistral Medium 3.1 in 0.
Which is cheaper, Claude Opus 4.8 or Mistral Medium 3.1?
Mistral Medium 3.1 costs 12.5× less per token ($2.4 vs $30 per 1M).
What is Claude Opus 4.8 better at?
Claude Opus 4.8 out-ranks Mistral Medium 3.1 at AI Strategy, Chef / Home Cooking, Coding.
More comparisons
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Prompt × model results
12 test cases · 3 evals