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GPT-5.2 Codex vs Kimi K2.5
Comprehensive side-by-side LLM comparison
GPT-5.2 Codex leads with 15.2% higher average benchmark score. Overall, GPT-5.2 Codex is the stronger choice for coding tasks.
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OpenAI
GPT-5.2 Codex is a coding-specialized variant from the GPT-5.2 family, designed for software engineering workflows including automated code generation, multi-file editing, and agentic development. It builds on GPT-5.2's improved instruction following and long-context capabilities, with optimizations specifically targeting programming tasks and agentic software workflows.
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Moonshot AI
Kimi K2.5, released by Moonshot AI in January 2026, is an updated Mixture-of-Experts large language model with 1 trillion total parameters and 32 billion active parameters. It builds on Kimi K2 with improved coding performance across multiple languages and an expanded context window. Kimi K2.5 targets agentic development workflows, polyglot code generation, and open-source deployments requiring large-scale MoE reasoning.
13 days newer
Kimi K2.5
Moonshot AI
2026-01
GPT-5.2 Codex
OpenAI
2026-01-14
Performance Metrics
Context window and performance specifications
Average performance across 2 common benchmarks
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GPT-5.2 Codex
Average Score:55.8%(+15.2%)
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Kimi K2.5
Average Score:40.6%
Performance comparison across key benchmark categories
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GPT-5.2 Codex
Coding55.8%(+15.2%)
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Kimi K2.5
Coding40.6%
Provider Availability & Performance
Available providers and their performance metrics
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GPT-5.2 Codex
0 providers
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Kimi K2.5
1 providers
Moonshot AI
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GPT-5.2 Codex
Avg Score:55.8%(+15.2%)
Providers:0
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Kimi K2.5
Avg Score:40.6%
Providers:1