Claude Fable 5
VS
Mistral Medium 3.1
Claude Fable 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 Fable 5 wins 20 of 22 task areas we tested; Mistral Medium 3.1 takes 2. Mistral Medium 3.1 costs 25.0× less per token ($2.4 vs $60 per 1M).
Mistral Medium 3.1 costs 25.0× less per token ($2.4 vs $60 per 1M).
Task by task
| Task area | Claude Fable 5 | Mistral Medium 3.1 | Winner |
|---|---|---|---|
| AI Strategy |
#1
/ 126
Strong
|
#120
/ 126
Usable
|
Claude Fable 5 |
| Chef / Home Cooking |
#3
/ 126
Strong
|
#116
/ 126
Needs editing
|
Claude Fable 5 |
| Content & Brand |
#1
/ 124
Excellent
|
#110
/ 124
Needs editing
|
Claude Fable 5 |
| Customer Support |
#1
/ 113
Excellent
|
#110
/ 113
Needs editing
|
Claude Fable 5 |
| Research & Competitive Analysis |
#3
/ 110
Excellent
|
#105
/ 110
Weak
|
Claude Fable 5 |
| Creative & Comedy | #1 / 110 | #100 / 110 | Claude Fable 5 |
| Coding |
#11
/ 115
Excellent
|
#108
/ 115
Needs editing
|
Claude Fable 5 |
| Sales |
#5
/ 110
Strong
|
#92
/ 110
Usable
|
Claude Fable 5 |
| Presentations & Decks |
#20
/ 110
Excellent
|
#105
/ 110
Usable
|
Claude Fable 5 |
| Data & Analytics |
#3
/ 110
Excellent
|
#87
/ 110
Excellent
|
Claude Fable 5 |
| RAG, Safety & Grounding |
#30
/ 113
Excellent
|
#111
/ 113
Strong
|
Claude Fable 5 |
| Executive Assistant |
#22
/ 112
Strong
|
#94
/ 112
Usable
|
Claude Fable 5 |
| Legal & HR |
#1
/ 110
Excellent
|
#70
/ 110
Strong
|
Claude Fable 5 |
| Investor & Pitch |
#3
/ 66
Strong
|
#65
/ 66
Needs editing
|
Claude Fable 5 |
| Landing Pages |
#1
/ 72
Strong
|
#63
/ 72
Usable
|
Claude Fable 5 |
| Knowledge & Docs |
#27
/ 110
Strong
|
#77
/ 110
Usable
|
Claude Fable 5 |
| Translation & Localization |
#18
/ 110
Excellent
|
#53
/ 110
Excellent
|
Claude Fable 5 |
| Training & Education |
#16
/ 110
Excellent
|
#47
/ 110
Excellent
|
Claude Fable 5 |
| Product & Project Management |
#76
/ 110
Strong
|
#50
/ 110
Strong
|
Mistral Medium 3.1 |
| Frontend & Landing Pages |
#58
/ 109
Needs editing
|
#35
/ 109
Needs editing
|
Mistral Medium 3.1 |
| Structured Output |
#68
/ 113
Strong
|
#91
/ 113
Strong
|
Claude Fable 5 |
| Summarization & Meeting Notes |
#24
/ 110
Excellent
|
#39
/ 110
Excellent
|
Claude Fable 5 |
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.
Sales
Incumbent objection without bashing (Objection Handling)
“The response is exceptional and production-ready. It perfectly captures the pragmatic, anti-hype brand voice, strictly adheres to all negative constraints (even explicitly calling out why it won't invent a recovery number), and proposes a highly relevant, low-friction next step.”
“The model completely ignores the instruction to probe the concern instead of countering, opting for a defensive feature-dump. It also violates a hard negative constraint by inventing a comparative statistic.”
Frequently asked
Is Claude Fable 5 better than Mistral Medium 3.1?
Across 22 task areas we benchmarked, Claude Fable 5 ranks higher in 20 and Mistral Medium 3.1 in 2.
Which is cheaper, Claude Fable 5 or Mistral Medium 3.1?
Mistral Medium 3.1 costs 25.0× less per token ($2.4 vs $60 per 1M).
What is Claude Fable 5 better at?
Claude Fable 5 out-ranks Mistral Medium 3.1 at AI Strategy, Chef / Home Cooking, Content & Brand.
What is Mistral Medium 3.1 better at?
Mistral Medium 3.1 out-ranks Claude Fable 5 at Product & Project Management, Frontend & Landing Pages.
More comparisons
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Prompt × model results
12 test cases · 3 evals