Claude Haiku 4.5
VS
GPT-5.5
Claude Haiku 4.5 vs GPT-5.5: 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-5.5 wins 20 of 22 task areas we tested; Claude Haiku 4.5 takes 2. Claude Haiku 4.5 costs 5.8× less per token ($6 vs $35 per 1M).
Claude Haiku 4.5 costs 5.8× less per token ($6 vs $35 per 1M).
Task by task
| Task area | Claude Haiku 4.5 | GPT-5.5 | Winner |
|---|---|---|---|
| Chef / Home Cooking |
#113
/ 126
Needs editing
|
#4
/ 126
Strong
|
GPT-5.5 |
| Structured Output |
#109
/ 113
Usable
|
#3
/ 113
Excellent
|
GPT-5.5 |
| Customer Support |
#99
/ 113
Usable
|
#3
/ 113
Strong
|
GPT-5.5 |
| Coding |
#94
/ 115
Usable
|
#1
/ 115
Excellent
|
GPT-5.5 |
| Content & Brand |
#89
/ 124
Usable
|
#4
/ 124
Strong
|
GPT-5.5 |
| Presentations & Decks |
#88
/ 110
Strong
|
#3
/ 110
Excellent
|
GPT-5.5 |
| Creative & Comedy | #84 / 110 | #2 / 110 | GPT-5.5 |
| RAG, Safety & Grounding |
#97
/ 113
Strong
|
#16
/ 113
Excellent
|
GPT-5.5 |
| Knowledge & Docs |
#71
/ 110
Usable
|
#5
/ 110
Excellent
|
GPT-5.5 |
| Executive Assistant |
#73
/ 112
Strong
|
#11
/ 112
Strong
|
GPT-5.5 |
| Landing Pages |
#61
/ 72
Usable
|
#9
/ 72
Strong
|
GPT-5.5 |
| Research & Competitive Analysis |
#59
/ 110
Usable
|
#7
/ 110
Excellent
|
GPT-5.5 |
| Investor & Pitch |
#63
/ 66
Needs editing
|
#16
/ 66
Strong
|
GPT-5.5 |
| Legal & HR |
#48
/ 110
Excellent
|
#9
/ 110
Excellent
|
GPT-5.5 |
| Sales |
#80
/ 110
Usable
|
#42
/ 110
Usable
|
GPT-5.5 |
| Product & Project Management |
#38
/ 110
Strong
|
#8
/ 110
Excellent
|
GPT-5.5 |
| AI Strategy |
#91
/ 126
Strong
|
#62
/ 126
Strong
|
GPT-5.5 |
| Training & Education |
#36
/ 110
Excellent
|
#63
/ 110
Excellent
|
Claude Haiku 4.5 |
| Translation & Localization |
#27
/ 110
Excellent
|
#3
/ 110
Excellent
|
GPT-5.5 |
| Summarization & Meeting Notes |
#27
/ 110
Excellent
|
#10
/ 110
Excellent
|
GPT-5.5 |
| Frontend & Landing Pages |
#7
/ 109
Usable
|
#13
/ 109
Needs editing
|
Claude Haiku 4.5 |
| Data & Analytics |
#53
/ 110
Excellent
|
#48
/ 110
Excellent
|
GPT-5.5 |
Rank = position among every model config we tested in that task area (lower is better). Sorted by biggest gap first.
Frequently asked
Is Claude Haiku 4.5 better than GPT-5.5?
Across 22 task areas we benchmarked, GPT-5.5 ranks higher in 20 and Claude Haiku 4.5 in 2.
Which is cheaper, Claude Haiku 4.5 or GPT-5.5?
Claude Haiku 4.5 costs 5.8× less per token ($6 vs $35 per 1M).
What is Claude Haiku 4.5 better at?
Claude Haiku 4.5 out-ranks GPT-5.5 at Training & Education, Frontend & Landing Pages.
What is GPT-5.5 better at?
GPT-5.5 out-ranks Claude Haiku 4.5 at Chef / Home Cooking, Structured Output, Customer Support.
More comparisons
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Prompt × model results
12 test cases · 3 evals