Claude Fable 5
VS
GPT-5.4 Mini
Claude Fable 5 vs GPT-5.4 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.
Claude Fable 5 wins 16 of 22 task areas we tested; GPT-5.4 Mini takes 6. GPT-5.4 Mini costs 11.4× less per token ($5.25 vs $60 per 1M).
GPT-5.4 Mini costs 11.4× less per token ($5.25 vs $60 per 1M).
Task by task
| Task area | Claude Fable 5 | GPT-5.4 Mini | Winner |
|---|---|---|---|
| Content & Brand |
#1
/ 124
Excellent
|
#84
/ 124
Usable
|
Claude Fable 5 |
| Chef / Home Cooking |
#3
/ 126
Strong
|
#83
/ 126
Usable
|
Claude Fable 5 |
| Structured Output |
#68
/ 113
Strong
|
#1
/ 113
Excellent
|
GPT-5.4 Mini |
| Executive Assistant |
#22
/ 112
Strong
|
#87
/ 112
Usable
|
Claude Fable 5 |
| Training & Education |
#16
/ 110
Excellent
|
#79
/ 110
Strong
|
Claude Fable 5 |
| Data & Analytics |
#3
/ 110
Excellent
|
#65
/ 110
Excellent
|
Claude Fable 5 |
| Product & Project Management |
#76
/ 110
Strong
|
#19
/ 110
Excellent
|
GPT-5.4 Mini |
| Creative & Comedy | #1 / 110 | #56 / 110 | Claude Fable 5 |
| Investor & Pitch |
#3
/ 66
Strong
|
#52
/ 66
Usable
|
Claude Fable 5 |
| AI Strategy |
#1
/ 126
Strong
|
#48
/ 126
Strong
|
Claude Fable 5 |
| Landing Pages |
#1
/ 72
Strong
|
#45
/ 72
Usable
|
Claude Fable 5 |
| Sales |
#5
/ 110
Strong
|
#40
/ 110
Usable
|
Claude Fable 5 |
| Legal & HR |
#1
/ 110
Excellent
|
#26
/ 110
Excellent
|
Claude Fable 5 |
| Knowledge & Docs |
#27
/ 110
Strong
|
#3
/ 110
Excellent
|
GPT-5.4 Mini |
| Customer Support |
#1
/ 113
Excellent
|
#21
/ 113
Strong
|
Claude Fable 5 |
| Frontend & Landing Pages |
#58
/ 109
Needs editing
|
#38
/ 109
Needs editing
|
GPT-5.4 Mini |
| Coding |
#11
/ 115
Excellent
|
#24
/ 115
Strong
|
Claude Fable 5 |
| RAG, Safety & Grounding |
#30
/ 113
Excellent
|
#42
/ 113
Excellent
|
Claude Fable 5 |
| Research & Competitive Analysis |
#3
/ 110
Excellent
|
#11
/ 110
Excellent
|
Claude Fable 5 |
| Summarization & Meeting Notes |
#24
/ 110
Excellent
|
#19
/ 110
Excellent
|
GPT-5.4 Mini |
| Presentations & Decks |
#20
/ 110
Excellent
|
#16
/ 110
Excellent
|
GPT-5.4 Mini |
| Translation & Localization |
#18
/ 110
Excellent
|
#21
/ 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.
Frequently asked
Is Claude Fable 5 better than GPT-5.4 Mini?
Across 22 task areas we benchmarked, Claude Fable 5 ranks higher in 16 and GPT-5.4 Mini in 6.
Which is cheaper, Claude Fable 5 or GPT-5.4 Mini?
GPT-5.4 Mini costs 11.4× less per token ($5.25 vs $60 per 1M).
What is Claude Fable 5 better at?
Claude Fable 5 out-ranks GPT-5.4 Mini at Content & Brand, Chef / Home Cooking, Executive Assistant.
What is GPT-5.4 Mini better at?
GPT-5.4 Mini out-ranks Claude Fable 5 at Structured Output, Product & Project Management, Knowledge & Docs.
More comparisons
This page is Spring Prompt, running in public
We just did this for every model. Do it for your prompt.
The rankings above come from running real tasks through real models and scoring every output. Spring Prompt is that same engine — pointed at your prompt, your test cases, and your definition of good.
- Generate test cases from your prompt — no eval set required to start.
- Compare models side by side with quality, cost and latency in one matrix.
- Optimise the winner until the scores say it's ready to ship.
Prompt × model results
12 test cases · 3 evals