Compare · ModelsLive · 2 picked · head to head
Claude Opus 4.5 vs Kimi K2 Thinking
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
Claude Opus 4.5 wins on 11/13 benchmarks
Claude Opus 4.5 wins 11 of 13 shared benchmarks. Leads in agentic · knowledge · general.
Category leads
agentic·Claude Opus 4.5knowledge·Claude Opus 4.5general·Claude Opus 4.5math·Claude Opus 4.5coding·Claude Opus 4.5
Hype vs Reality
Attention vs performance
Claude Opus 4.5
#185 by perf·#9 by attention
Kimi K2 Thinking
#108 by perf·#18 by attention
Best value
Kimi K2 Thinking
12.3x better value than Claude Opus 4.5
Claude Opus 4.5
2.8 pts/$
$15.00/M
Kimi K2 Thinking
34.0 pts/$
$1.55/M
Vendor risk
Who is behind the model
Anthropic
$965.0B·Tier 1
Moonshot AI
$50.0B·Tier 1
Head to head
13 benchmarks · 2 models
Claude Opus 4.5Kimi K2 Thinking
APEX-Agents
Claude Opus 4.5 leads by +14.4
APEX-Agents · evaluates AI agents on complex, multi-step tasks requiring planning, tool use, and autonomous decision-making in realistic environments.
Claude Opus 4.5
18.4
Kimi K2 Thinking
4.0
Chess Puzzles
Kimi K2 Thinking leads by +6.3
Chess Puzzles · tests strategic and tactical reasoning by having models solve chess puzzle positions, evaluating lookahead and pattern recognition abilities.
Claude Opus 4.5
9.5
Kimi K2 Thinking
15.8
Cl Bench
Claude Opus 4.5 leads by +3.5
Claude Opus 4.5
21.1
Kimi K2 Thinking
17.6
FrontierMath-2025-02-28-Private
Kimi K2 Thinking leads by +16.9
FrontierMath (Feb 2025) · original research-level math problems created by mathematicians, testing capabilities at the boundary of current AI mathematical reasoning.
Claude Opus 4.5
20.7
Kimi K2 Thinking
37.5
FrontierMath-Tier-4-2025-07-01-Private
Claude Opus 4.5 leads by +4.2
FrontierMath Tier 4 (Jul 2025) · the most challenging tier of frontier mathematics, containing problems that push the absolute limits of AI mathematical reasoning.
Claude Opus 4.5
4.2
Kimi K2 Thinking
0.0
GPQA diamond
Claude Opus 4.5 leads by +2.4
Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs.
Claude Opus 4.5
81.4
Kimi K2 Thinking
79.0
Metr Time Horizons
Claude Opus 4.5 leads by +15.8
Claude Opus 4.5
75.0
Kimi K2 Thinking
59.2
OTIS Mock AIME 2024-2025
Claude Opus 4.5 leads by +3.1
OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills.
Claude Opus 4.5
86.1
Kimi K2 Thinking
83.0
PostTrainBench
Claude Opus 4.5 leads by +10.0
Claude Opus 4.5
17.3
Kimi K2 Thinking
7.3
SimpleQA Verified
Claude Opus 4.5 leads by +10.2
SimpleQA Verified · short factual questions with verified answers, measuring factual accuracy and the tendency to hallucinate or provide incorrect information.
Claude Opus 4.5
41.8
Kimi K2 Thinking
31.6
SWE-Bench Verified (Bash Only)
Claude Opus 4.5 leads by +11.0
SWE-Bench Verified (Bash Only) · a curated subset of SWE-bench where models fix real Python repository bugs using only bash commands, no agent frameworks.
Claude Opus 4.5
74.4
Kimi K2 Thinking
63.4
Terminal Bench
Claude Opus 4.5 leads by +27.4
Terminal-Bench 2.0 · evaluates AI agents on real terminal-based coding tasks · writing scripts, debugging, running tests, and managing projects entirely through command-line interaction. Tests both code quality and terminal fluency. Claude Opus 4.7 scores 69.4%, demonstrating significant agentic terminal competence.
Claude Opus 4.5
63.1
Kimi K2 Thinking
35.7
WeirdML
Claude Opus 4.5 leads by +21.0
WeirdML · tests models on unusual and adversarial machine learning tasks that require creative problem-solving beyond standard patterns.
Claude Opus 4.5
63.7
Kimi K2 Thinking
42.8
Full benchmark table
| Benchmark | Claude Opus 4.5 | Kimi K2 Thinking |
|---|---|---|
APEX-Agents APEX-Agents · evaluates AI agents on complex, multi-step tasks requiring planning, tool use, and autonomous decision-making in realistic environments. | 18.4 | 4.0 |
Chess Puzzles Chess Puzzles · tests strategic and tactical reasoning by having models solve chess puzzle positions, evaluating lookahead and pattern recognition abilities. | 9.5 | 15.8 |
Cl Bench | 21.1 | 17.6 |
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. | 20.7 | 37.5 |
FrontierMath-Tier-4-2025-07-01-Private FrontierMath Tier 4 (Jul 2025) · the most challenging tier of frontier mathematics, containing problems that push the absolute limits of AI mathematical reasoning. | 4.2 | 0.0 |
GPQA diamond Graduate-Level Google-Proof QA (Diamond set) · expert-crafted questions in physics, biology, and chemistry that are difficult even for domain PhDs. | 81.4 | 79.0 |
Metr Time Horizons | 75.0 | 59.2 |
OTIS Mock AIME 2024-2025 OTIS Mock AIME 2024-2025 · simulated American Invitational Mathematics Examination problems testing advanced problem-solving skills. | 86.1 | 83.0 |
PostTrainBench | 17.3 | 7.3 |
SimpleQA Verified SimpleQA Verified · short factual questions with verified answers, measuring factual accuracy and the tendency to hallucinate or provide incorrect information. | 41.8 | 31.6 |
SWE-Bench Verified (Bash Only) SWE-Bench Verified (Bash Only) · a curated subset of SWE-bench where models fix real Python repository bugs using only bash commands, no agent frameworks. | 74.4 | 63.4 |
Terminal Bench Terminal-Bench 2.0 · evaluates AI agents on real terminal-based coding tasks · writing scripts, debugging, running tests, and managing projects entirely through command-line interaction. Tests both code quality and terminal fluency. Claude Opus 4.7 scores 69.4%, demonstrating significant agentic terminal competence. | 63.1 | 35.7 |
WeirdML WeirdML · tests models on unusual and adversarial machine learning tasks that require creative problem-solving beyond standard patterns. | 63.7 | 42.8 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| $5.00 | $25.00 | 200K tokens (~100 books) | $100.00 | |
| $0.60 | $2.50 | 262K tokens (~131 books) | $10.75 |