Claude Sonnet 5
VS
GPT-5.4
Claude Sonnet 5 vs GPT-5.4: 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.
GPT-5.4 wins 16 of 22 task areas we tested; Claude Sonnet 5 takes 6. Claude Sonnet 5 costs 1.5× less per token ($12 vs $17.5 per 1M).
Claude Sonnet 5 costs 1.5× less per token ($12 vs $17.5 per 1M).
Task by task
| Task area | Claude Sonnet 5 | GPT-5.4 | Winner |
|---|---|---|---|
| Creative & Comedy | #79 / 110 | #6 / 110 | GPT-5.4 |
| Content & Brand |
#67
/ 124
Strong
|
#7
/ 124
Strong
|
GPT-5.4 |
| Structured Output |
#69
/ 113
Strong
|
#9
/ 113
Excellent
|
GPT-5.4 |
| RAG, Safety & Grounding |
#86
/ 113
Excellent
|
#29
/ 113
Excellent
|
GPT-5.4 |
| Frontend & Landing Pages |
#57
/ 109
Needs editing
|
#5
/ 109
Usable
|
GPT-5.4 |
| Product & Project Management |
#61
/ 110
Strong
|
#13
/ 110
Excellent
|
GPT-5.4 |
| Executive Assistant |
#72
/ 112
Strong
|
#25
/ 112
Strong
|
GPT-5.4 |
| Summarization & Meeting Notes |
#58
/ 110
Excellent
|
#11
/ 110
Excellent
|
GPT-5.4 |
| Customer Support |
#57
/ 113
Strong
|
#13
/ 113
Strong
|
GPT-5.4 |
| Legal & HR |
#57
/ 110
Excellent
|
#20
/ 110
Excellent
|
GPT-5.4 |
| AI Strategy |
#2
/ 126
Strong
|
#37
/ 126
Strong
|
Claude Sonnet 5 |
| Investor & Pitch |
#39
/ 66
Usable
|
#7
/ 66
Strong
|
GPT-5.4 |
| Data & Analytics |
#16
/ 110
Excellent
|
#42
/ 110
Excellent
|
Claude Sonnet 5 |
| Sales |
#16
/ 110
Strong
|
#41
/ 110
Usable
|
Claude Sonnet 5 |
| Translation & Localization |
#41
/ 110
Excellent
|
#17
/ 110
Excellent
|
GPT-5.4 |
| Presentations & Decks |
#22
/ 110
Excellent
|
#1
/ 110
Excellent
|
GPT-5.4 |
| Knowledge & Docs |
#18
/ 110
Strong
|
#1
/ 110
Excellent
|
GPT-5.4 |
| Training & Education |
#52
/ 110
Excellent
|
#69
/ 110
Strong
|
Claude Sonnet 5 |
| Research & Competitive Analysis |
#15
/ 110
Excellent
|
#1
/ 110
Excellent
|
GPT-5.4 |
| Landing Pages |
#12
/ 72
Strong
|
#22
/ 72
Strong
|
Claude Sonnet 5 |
| Chef / Home Cooking |
#28
/ 126
Usable
|
#19
/ 126
Strong
|
GPT-5.4 |
| Coding |
#6
/ 115
Excellent
|
#9
/ 115
Excellent
|
Claude Sonnet 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 5 better than GPT-5.4?
Across 22 task areas we benchmarked, GPT-5.4 ranks higher in 16 and Claude Sonnet 5 in 6.
Which is cheaper, Claude Sonnet 5 or GPT-5.4?
Claude Sonnet 5 costs 1.5× less per token ($12 vs $17.5 per 1M).
What is Claude Sonnet 5 better at?
Claude Sonnet 5 out-ranks GPT-5.4 at AI Strategy, Data & Analytics, Sales.
What is GPT-5.4 better at?
GPT-5.4 out-ranks Claude Sonnet 5 at Creative & Comedy, Content & Brand, Structured Output.
More comparisons
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12 test cases · 3 evals