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GPT-4.5 vs Kimi K2-Instruct-0905
Comprehensive side-by-side LLM comparison
Kimi K2-Instruct-0905 leads with 6.5% higher average benchmark score. GPT-4.5 supports multimodal inputs. Overall, Kimi K2-Instruct-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 Instruct-0905 represents a specific release iteration of the K2 Instruct model, developed to incorporate refinements and improvements. Built to provide enhanced instruction-following based on deployment feedback, it continues the evolution of Moonshot's instruction-tuned offerings.
6 months newer
GPT-4.5
OpenAI
2025-02-27
Kimi K2-Instruct-0905
Moonshot AI
2025-09-05
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Performance Metrics
Context window and performance specifications
Average performance across 7 common benchmarks
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GPT-4.5
Average Score:61.4%
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Kimi K2-Instruct-0905
Average Score:67.8%(+6.5%)
Performance comparison across key benchmark categories
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GPT-4.5
Coding38.0%
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Kimi K2-Instruct-0905
Coding65.8%(+27.8%)
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-Instruct-0905
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GPT-4.5
Avg Score:61.4%
Providers:1
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Kimi K2-Instruct-0905
Avg Score:67.8%(+6.5%)
Providers:0