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GPT-4.5 vs Kimi K2 0905
Comprehensive side-by-side LLM comparison
GPT-4.5 leads with 41.4% higher average benchmark score. Kimi K2 0905 offers 392.2K more tokens in context window than GPT-4.5. Kimi K2 0905 is $221.90 cheaper per million tokens. GPT-4.5 supports multimodal inputs. Overall, GPT-4.5 is the stronger choice for coding tasks.
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OpenAI
GPT-4.5 is a multimodal language model developed by OpenAI. It achieves strong performance with an average score of 63.1% across 27 benchmarks. It excels particularly in GSM8k (97.0%), MMLU (90.8%), CharXiv-D (90.0%). It supports a 132K token context window for handling large documents. The model is available through 1 API provider. As a multimodal model, it can process and understand text, images, and other input formats seamlessly. Released in 2025, it represents OpenAI's latest advancement in AI technology.
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Moonshot AI
Kimi K2 0905 is a language model developed by Moonshot AI. This model demonstrates exceptional performance with an average score of 84.0% across 6 benchmarks. It excels particularly in HumanEval (94.5%), MMLU (90.2%), MATH (89.1%). It supports a 524K token context window for handling large documents. The model is available through 2 API providers. Released in 2025, it represents Moonshot AI's latest advancement in AI technology.
6 months newer
GPT-4.5
OpenAI
2025-02-27
Kimi K2 0905
Moonshot AI
2025-09-05
Pricing Comparison
Cost per million tokens (USD)
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GPT-4.5
Input:$75.00
Output:$150.00
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Kimi K2 0905
Input:$0.60
Output:$2.50($221.90 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 29 common benchmarks
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GPT-4.5
Average Score:58.8%(+41.4%)
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Kimi K2 0905
Average Score:17.4%
Provider Availability & Performance
Available providers and their performance metrics
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GPT-4.5
1 providers
OpenAI
Throughput: 50 tok/s
Latency: 20ms
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Kimi K2 0905
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GPT-4.5
Avg Score:58.8%(+41.4%)
Providers:1
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Kimi K2 0905
Avg Score:17.4%
Providers:2