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GPT-5 Codex vs Kimi K2-Instruct-0905
Comprehensive side-by-side LLM comparison
GPT-5 Codex leads with 8.7% higher average benchmark score. Overall, GPT-5 Codex is the stronger choice for coding tasks.
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OpenAI
GPT-5 Codex was developed as a specialized variant of GPT-5 optimized for programming and software development tasks. Built to understand and generate code across multiple programming languages, it serves developers with enhanced capabilities for code completion, debugging, translation, and explanation of complex codebases.
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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.
10 days newer
Kimi K2-Instruct-0905
Moonshot AI
2025-09-05
GPT-5 Codex
OpenAI
2025-09-15
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Average performance across 1 common benchmarks
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GPT-5 Codex
Average Score:74.5%(+8.7%)
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Kimi K2-Instruct-0905
Average Score:65.8%
Performance comparison across key benchmark categories
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GPT-5 Codex
Coding74.5%(+8.7%)
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Kimi K2-Instruct-0905
Coding65.8%
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Knowledge Cutoff
Training data recency comparison
GPT-5 Codex
2024-09-30
More recent knowledge cutoff means awareness of newer technologies and frameworks
Provider Availability & Performance
Available providers and their performance metrics
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GPT-5 Codex
0 providers
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Kimi K2-Instruct-0905
0 providers
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GPT-5 Codex
Avg Score:74.5%(+8.7%)
Providers:0
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Kimi K2-Instruct-0905
Avg Score:65.8%
Providers:0