Compare · ModelsLive · 2 picked · head to head
Kimi K2.5 vs o1
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
Kimi K2.5 wins on 7/7 benchmarks
Kimi K2.5 wins 7 of 7 shared benchmarks. Leads in reasoning · knowledge · math.
Category leads
reasoning·Kimi K2.5knowledge·Kimi K2.5math·Kimi K2.5coding·Kimi K2.5
Hype vs Reality
Attention vs performance
Kimi K2.5
#87 by perf·no signal
o1
#59 by perf·no signal
Best value
Kimi K2.5
28.3x better value than o1
Kimi K2.5
42.6 pts/$
$1.22/M
o1
1.5 pts/$
$37.50/M
Vendor risk
Who is behind the model
moonshotai
private · undisclosed
OpenAI
$840.0B·Tier 1
Head to head
7 benchmarks · 2 models
Kimi K2.5o1
ARC-AGI
Kimi K2.5 leads by +34.6
ARC-AGI · the original Abstraction and Reasoning Corpus, testing whether AI can solve novel visual pattern recognition tasks without memorization.
Kimi K2.5
65.3
o1
30.7
Fiction.LiveBench
Kimi K2.5 leads by +2.8
Fiction.LiveBench · a continuously updated benchmark using recently published fiction to test reading comprehension and reasoning, preventing data contamination.
Kimi K2.5
86.1
o1
83.3
FrontierMath-2025-02-28-Private
Kimi K2.5 leads by +18.6
FrontierMath (Feb 2025) · original research-level math problems created by mathematicians, testing capabilities at the boundary of current AI mathematical reasoning.
Kimi K2.5
27.9
o1
9.3
GPQA diamond
Kimi K2.5 leads by +14.5
Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs.
Kimi K2.5
83.5
o1
69.0
OTIS Mock AIME 2024-2025
Kimi K2.5 leads by +18.9
OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills.
Kimi K2.5
92.2
o1
73.3
SimpleBench
Kimi K2.5 leads by +8.0
SimpleBench · tests fundamental reasoning capabilities with straightforward problems designed to expose gaps in basic logical and spatial thinking.
Kimi K2.5
36.2
o1
28.1
WeirdML
Kimi K2.5 leads by +1.8
WeirdML · tests models on unusual and adversarial machine learning tasks that require creative problem-solving beyond standard patterns.
Kimi K2.5
45.6
o1
43.8
Full benchmark table
| Benchmark | Kimi K2.5 | o1 |
|---|---|---|
ARC-AGI ARC-AGI · the original Abstraction and Reasoning Corpus, testing whether AI can solve novel visual pattern recognition tasks without memorization. | 65.3 | 30.7 |
Fiction.LiveBench Fiction.LiveBench · a continuously updated benchmark using recently published fiction to test reading comprehension and reasoning, preventing data contamination. | 86.1 | 83.3 |
FrontierMath-2025-02-28-Private FrontierMath (Feb 2025) · original research-level math problems created by mathematicians, testing capabilities at the boundary of current AI mathematical reasoning. | 27.9 | 9.3 |
GPQA diamond Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs. | 83.5 | 69.0 |
OTIS Mock AIME 2024-2025 OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills. | 92.2 | 73.3 |
SimpleBench SimpleBench · tests fundamental reasoning capabilities with straightforward problems designed to expose gaps in basic logical and spatial thinking. | 36.2 | 28.1 |
WeirdML WeirdML · tests models on unusual and adversarial machine learning tasks that require creative problem-solving beyond standard patterns. | 45.6 | 43.8 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
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