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GPT-4.5 vs Kimi K2 0905
Comprehensive side-by-side LLM comparison
Kimi K2 0905 leads with 11.9% 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, Kimi K2 0905 is the stronger choice for coding tasks.
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OpenAI
GPT-4.5 was developed as an intermediate advancement between GPT-4 and GPT-5, designed to incorporate incremental improvements in reasoning, factuality, and instruction-following. Built to bridge generational capabilities while maintaining compatibility with existing applications, it represents a refinement of the GPT-4 architecture with enhanced performance characteristics.
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Moonshot AI
Kimi K2 was introduced as the second generation of Moonshot's language model family, designed to provide enhanced capabilities across language understanding and generation. Built with architectural improvements and expanded training, it represents a significant advancement in Moonshot's model offerings.
6 months newer
GPT-4.5
OpenAI
2025-02-27
Kimi K2 0905
Moonshot AI
2025-09-05
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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 4 common benchmarks
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GPT-4.5
Average Score:71.2%
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Kimi K2 0905
Average Score:83.1%(+11.9%)
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:71.2%
Providers:1
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Kimi K2 0905
Avg Score:83.1%(+11.9%)
Providers:2