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GPT-5.1 Codex Max vs GPT-5.2 Codex
Comprehensive side-by-side LLM comparison
GPT-5.2 Codex leads with 1.3% higher average benchmark score. Both models have their strengths depending on your specific coding needs.
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OpenAI
GPT-5.1 Codex Max, released by OpenAI in November 2025, is an enhanced coding variant from the GPT-5.1 Codex line, designed for more complex software engineering tasks requiring additional reasoning depth. It targets large-scale code generation, automated refactoring, and sophisticated agentic development workflows.
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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.
2 months newer
GPT-5.1 Codex Max
OpenAI
2025-11
GPT-5.2 Codex
OpenAI
2026-01-14
Average performance across 2 common benchmarks
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GPT-5.1 Codex Max
Average Score:54.4%
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GPT-5.2 Codex
Average Score:55.8%(+1.3%)
Performance comparison across key benchmark categories
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GPT-5.1 Codex Max
Coding54.4%
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GPT-5.2 Codex
Coding55.8%(+1.3%)
Provider Availability & Performance
Available providers and their performance metrics
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GPT-5.1 Codex Max
0 providers
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GPT-5.2 Codex
0 providers
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GPT-5.1 Codex Max
Avg Score:54.4%
Providers:0
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GPT-5.2 Codex
Avg Score:55.8%(+1.3%)
Providers:0