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GPT-4.5 vs Kimi K2 Base
Comprehensive side-by-side LLM comparison
GPT-4.5 leads with 14.1% higher average benchmark score. 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 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 Base was created as the foundation model in the K2 series, designed to serve as a starting point for fine-tuning and customization. Built to provide strong base capabilities for domain-specific applications, it enables developers to build specialized solutions on Moonshot's architecture.
4 months newer
GPT-4.5
OpenAI
2025-02-27
Kimi K2 Base
Moonshot AI
2025-07-11
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Performance Metrics
Context window and performance specifications
Average performance across 4 common benchmarks
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GPT-4.5
Average Score:80.0%(+14.1%)
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Kimi K2 Base
Average Score:65.8%
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 Base
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GPT-4.5
Avg Score:80.0%(+14.1%)
Providers:1
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Kimi K2 Base
Avg Score:65.8%
Providers:0