Claude Haiku 4.5
VS
Claude Opus 4.5
Claude Haiku 4.5 vs Claude Opus 4.5: 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.
Claude Opus 4.5 wins 21 of 22 task areas we tested; Claude Haiku 4.5 takes 1. Claude Haiku 4.5 costs 5.0× less per token ($6 vs $30 per 1M).
Claude Haiku 4.5 costs 5.0× less per token ($6 vs $30 per 1M).
Task by task
| Task area | Claude Haiku 4.5 | Claude Opus 4.5 | Winner |
|---|---|---|---|
| Chef / Home Cooking |
#113
/ 126
Needs editing
|
#14
/ 126
Strong
|
Claude Opus 4.5 |
| Sales |
#80
/ 110
Usable
|
#3
/ 110
Strong
|
Claude Opus 4.5 |
| Creative & Comedy | #84 / 110 | #8 / 110 | Claude Opus 4.5 |
| AI Strategy |
#91
/ 126
Strong
|
#16
/ 126
Strong
|
Claude Opus 4.5 |
| Executive Assistant |
#73
/ 112
Strong
|
#4
/ 112
Strong
|
Claude Opus 4.5 |
| Content & Brand |
#89
/ 124
Usable
|
#21
/ 124
Strong
|
Claude Opus 4.5 |
| Coding |
#94
/ 115
Usable
|
#39
/ 115
Strong
|
Claude Opus 4.5 |
| Landing Pages |
#61
/ 72
Usable
|
#7
/ 72
Strong
|
Claude Opus 4.5 |
| Investor & Pitch |
#63
/ 66
Needs editing
|
#10
/ 66
Strong
|
Claude Opus 4.5 |
| RAG, Safety & Grounding |
#97
/ 113
Strong
|
#52
/ 113
Excellent
|
Claude Opus 4.5 |
| Data & Analytics |
#53
/ 110
Excellent
|
#9
/ 110
Excellent
|
Claude Opus 4.5 |
| Customer Support |
#99
/ 113
Usable
|
#56
/ 113
Strong
|
Claude Opus 4.5 |
| Presentations & Decks |
#88
/ 110
Strong
|
#45
/ 110
Excellent
|
Claude Opus 4.5 |
| Research & Competitive Analysis |
#59
/ 110
Usable
|
#17
/ 110
Excellent
|
Claude Opus 4.5 |
| Structured Output |
#109
/ 113
Usable
|
#82
/ 113
Strong
|
Claude Opus 4.5 |
| Summarization & Meeting Notes |
#27
/ 110
Excellent
|
#1
/ 110
Excellent
|
Claude Opus 4.5 |
| Knowledge & Docs |
#71
/ 110
Usable
|
#47
/ 110
Strong
|
Claude Opus 4.5 |
| Product & Project Management |
#38
/ 110
Strong
|
#60
/ 110
Strong
|
Claude Haiku 4.5 |
| Translation & Localization |
#27
/ 110
Excellent
|
#5
/ 110
Excellent
|
Claude Opus 4.5 |
| Legal & HR |
#48
/ 110
Excellent
|
#30
/ 110
Excellent
|
Claude Opus 4.5 |
| Training & Education |
#36
/ 110
Excellent
|
#24
/ 110
Excellent
|
Claude Opus 4.5 |
| Frontend & Landing Pages |
#7
/ 109
Usable
|
#2
/ 109
Usable
|
Claude Opus 4.5 |
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 Claude Opus 4.5?
Across 22 task areas we benchmarked, Claude Opus 4.5 ranks higher in 21 and Claude Haiku 4.5 in 1.
Which is cheaper, Claude Haiku 4.5 or Claude Opus 4.5?
Claude Haiku 4.5 costs 5.0× less per token ($6 vs $30 per 1M).
What is Claude Haiku 4.5 better at?
Claude Haiku 4.5 out-ranks Claude Opus 4.5 at Product & Project Management.
What is Claude Opus 4.5 better at?
Claude Opus 4.5 out-ranks Claude Haiku 4.5 at Chef / Home Cooking, Sales, Creative & Comedy.
More comparisons
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Prompt × model results
12 test cases · 3 evals