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Claude Sonnet 4.5 vs Kimi K2 Instruct
Comprehensive side-by-side LLM comparison
Kimi K2 Instruct leads with 42.2% higher average benchmark score. Claude Sonnet 4.5 offers 1.9K more tokens in context window than Kimi K2 Instruct. Kimi K2 Instruct is $15.13 cheaper per million tokens. Claude Sonnet 4.5 supports multimodal inputs. Overall, Kimi K2 Instruct is the stronger choice for coding tasks.
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Anthropic
Claude Sonnet 4.5 is a multimodal language model developed by Anthropic. It achieves strong performance with an average score of 75.8% across 9 benchmarks. It excels particularly in MMMLU (89.1%), AIME 2025 (87.0%), TAU-bench Retail (86.2%). It supports a 264K token context window for handling large documents. The model is available through 2 API providers. As a multimodal model, it can process and understand text, images, and other input formats seamlessly. Released in 2025, it represents Anthropic's latest advancement in AI technology.
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Moonshot AI
Kimi K2 Instruct is a language model developed by Moonshot AI. It achieves strong performance with an average score of 66.7% across 38 benchmarks. It excels particularly in MATH-500 (97.4%), GSM8k (97.3%), CBNSL (95.6%). It supports a 262K token context window for handling large documents. The model is available through 1 API provider. It's licensed for commercial use, making it suitable for enterprise applications. Released in 2025, it represents Moonshot AI's latest advancement in AI technology.
2 months newer
Kimi K2 Instruct
Moonshot AI
2025-07-11
Claude Sonnet 4.5
Anthropic
2025-09-29
Pricing Comparison
Cost per million tokens (USD)
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Claude Sonnet 4.5
Input:$3.00
Output:$15.00
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Kimi K2 Instruct
Input:$0.57
Output:$2.30($15.13 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 40 common benchmarks
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Claude Sonnet 4.5
Average Score:17.1%
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Kimi K2 Instruct
Average Score:59.2%(+42.2%)
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Knowledge Cutoff
Training data recency comparison
Claude Sonnet 4.5
2025-01-31
More recent knowledge cutoff means awareness of newer technologies and frameworks
Provider Availability & Performance
Available providers and their performance metrics
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Claude Sonnet 4.5
2 providers
Anthropic
Throughput: 42 tok/s
Latency: 0.4ms
ZeroEval
Throughput: 42 tok/s
Latency: 0.4ms
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Claude Sonnet 4.5
Avg Score:17.1%
Providers:2
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Kimi K2 Instruct
Avg Score:59.2%(+42.2%)
Providers:1