Claude Opus 4.8
VS
GPT-5.4 Mini
Claude Opus 4.8 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 Opus 4.8 wins 18 of 22 task areas we tested; GPT-5.4 Mini takes 4. GPT-5.4 Mini costs 5.7× less per token ($5.25 vs $30 per 1M).
GPT-5.4 Mini costs 5.7× less per token ($5.25 vs $30 per 1M).
Task by task
| Task area | Claude Opus 4.8 | GPT-5.4 Mini | Winner |
|---|---|---|---|
| Executive Assistant |
#9
/ 112
Strong
|
#87
/ 112
Usable
|
Claude Opus 4.8 |
| Training & Education |
#2
/ 110
Excellent
|
#79
/ 110
Strong
|
Claude Opus 4.8 |
| Content & Brand |
#8
/ 124
Strong
|
#84
/ 124
Usable
|
Claude Opus 4.8 |
| Chef / Home Cooking |
#9
/ 126
Strong
|
#83
/ 126
Usable
|
Claude Opus 4.8 |
| Data & Analytics |
#2
/ 110
Excellent
|
#65
/ 110
Excellent
|
Claude Opus 4.8 |
| Structured Output |
#61
/ 113
Excellent
|
#1
/ 113
Excellent
|
GPT-5.4 Mini |
| AI Strategy |
#4
/ 126
Strong
|
#48
/ 126
Strong
|
Claude Opus 4.8 |
| Creative & Comedy | #17 / 110 | #56 / 110 | Claude Opus 4.8 |
| Sales |
#1
/ 110
Strong
|
#40
/ 110
Usable
|
Claude Opus 4.8 |
| RAG, Safety & Grounding |
#11
/ 113
Excellent
|
#42
/ 113
Excellent
|
Claude Opus 4.8 |
| Landing Pages |
#18
/ 72
Strong
|
#45
/ 72
Usable
|
Claude Opus 4.8 |
| Investor & Pitch |
#27
/ 66
Strong
|
#52
/ 66
Usable
|
Claude Opus 4.8 |
| Coding |
#3
/ 115
Excellent
|
#24
/ 115
Strong
|
Claude Opus 4.8 |
| Legal & HR |
#5
/ 110
Excellent
|
#26
/ 110
Excellent
|
Claude Opus 4.8 |
| Frontend & Landing Pages |
#21
/ 109
Needs editing
|
#38
/ 109
Needs editing
|
Claude Opus 4.8 |
| Product & Project Management |
#2
/ 110
Excellent
|
#19
/ 110
Excellent
|
Claude Opus 4.8 |
| Presentations & Decks |
#32
/ 110
Excellent
|
#16
/ 110
Excellent
|
GPT-5.4 Mini |
| Summarization & Meeting Notes |
#35
/ 110
Excellent
|
#19
/ 110
Excellent
|
GPT-5.4 Mini |
| Translation & Localization |
#35
/ 110
Excellent
|
#21
/ 110
Excellent
|
GPT-5.4 Mini |
| Customer Support |
#8
/ 113
Strong
|
#21
/ 113
Strong
|
Claude Opus 4.8 |
| Research & Competitive Analysis |
#5
/ 110
Excellent
|
#11
/ 110
Excellent
|
Claude Opus 4.8 |
| Knowledge & Docs |
#2
/ 110
Excellent
|
#3
/ 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.
Frequently asked
Is Claude Opus 4.8 better than GPT-5.4 Mini?
Across 22 task areas we benchmarked, Claude Opus 4.8 ranks higher in 18 and GPT-5.4 Mini in 4.
Which is cheaper, Claude Opus 4.8 or GPT-5.4 Mini?
GPT-5.4 Mini costs 5.7× less per token ($5.25 vs $30 per 1M).
What is Claude Opus 4.8 better at?
Claude Opus 4.8 out-ranks GPT-5.4 Mini at Executive Assistant, Training & Education, Content & Brand.
What is GPT-5.4 Mini better at?
GPT-5.4 Mini out-ranks Claude Opus 4.8 at Structured Output, Presentations & Decks, Summarization & Meeting Notes.
More comparisons
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Prompt × model results
12 test cases · 3 evals