GPT-5.5
VS
Kimi K2.5
GPT-5.5 vs Kimi K2.5: 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 17 of 22 task areas we tested; Kimi K2.5 takes 5. Kimi K2.5 costs 14.6× less per token ($2.4 vs $35 per 1M).
Kimi K2.5 costs 14.6× less per token ($2.4 vs $35 per 1M).
Task by task
| Task area | GPT-5.5 | Kimi K2.5 | Winner |
|---|---|---|---|
| Summarization & Meeting Notes |
#10
/ 110
Excellent
|
#92
/ 110
Excellent
|
GPT-5.5 |
| Product & Project Management |
#8
/ 110
Excellent
|
#66
/ 110
Strong
|
GPT-5.5 |
| Knowledge & Docs |
#5
/ 110
Excellent
|
#59
/ 110
Usable
|
GPT-5.5 |
| Customer Support |
#3
/ 113
Strong
|
#50
/ 113
Strong
|
GPT-5.5 |
| Training & Education |
#63
/ 110
Excellent
|
#22
/ 110
Excellent
|
Kimi K2.5 |
| Chef / Home Cooking |
#4
/ 126
Strong
|
#44
/ 126
Usable
|
GPT-5.5 |
| Creative & Comedy | #2 / 110 | #42 / 110 | GPT-5.5 |
| Structured Output |
#3
/ 113
Excellent
|
#41
/ 113
Excellent
|
GPT-5.5 |
| Coding |
#1
/ 115
Excellent
|
#38
/ 115
Strong
|
GPT-5.5 |
| AI Strategy |
#62
/ 126
Strong
|
#28
/ 126
Strong
|
Kimi K2.5 |
| Translation & Localization |
#3
/ 110
Excellent
|
#34
/ 110
Excellent
|
GPT-5.5 |
| Content & Brand |
#4
/ 124
Strong
|
#33
/ 124
Strong
|
GPT-5.5 |
| Data & Analytics |
#48
/ 110
Excellent
|
#19
/ 110
Excellent
|
Kimi K2.5 |
| Research & Competitive Analysis |
#7
/ 110
Excellent
|
#31
/ 110
Strong
|
GPT-5.5 |
| Sales |
#42
/ 110
Usable
|
#19
/ 110
Strong
|
Kimi K2.5 |
| Legal & HR |
#9
/ 110
Excellent
|
#31
/ 110
Excellent
|
GPT-5.5 |
| Investor & Pitch |
#16
/ 66
Strong
|
#37
/ 66
Usable
|
GPT-5.5 |
| Frontend & Landing Pages |
#13
/ 109
Needs editing
|
#26
/ 109
Needs editing
|
GPT-5.5 |
| Executive Assistant |
#11
/ 112
Strong
|
#23
/ 112
Strong
|
GPT-5.5 |
| Landing Pages |
#9
/ 72
Strong
|
#20
/ 72
Strong
|
GPT-5.5 |
| Presentations & Decks |
#3
/ 110
Excellent
|
#12
/ 110
Excellent
|
GPT-5.5 |
| RAG, Safety & Grounding |
#16
/ 113
Excellent
|
#12
/ 113
Excellent
|
Kimi K2.5 |
Rank = position among every model config we tested in that task area (lower is better). Sorted by biggest gap first.
Frequently asked
Is GPT-5.5 better than Kimi K2.5?
Across 22 task areas we benchmarked, GPT-5.5 ranks higher in 17 and Kimi K2.5 in 5.
Which is cheaper, GPT-5.5 or Kimi K2.5?
Kimi K2.5 costs 14.6× less per token ($2.4 vs $35 per 1M).
What is GPT-5.5 better at?
GPT-5.5 out-ranks Kimi K2.5 at Summarization & Meeting Notes, Product & Project Management, Knowledge & Docs.
What is Kimi K2.5 better at?
Kimi K2.5 out-ranks GPT-5.5 at Training & Education, AI Strategy, Data & Analytics.
More comparisons
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Prompt × model results
12 test cases · 3 evals