+
+
+
+
+
+
+
+
VS
VS
VS
VS
VS
VS
GPT-5.1 Codex vs GPT-5.3 Codex
Comprehensive side-by-side LLM comparison
. Both models have their strengths depending on your specific coding needs.
+
+
+
+
OpenAI
GPT-5.1 Codex, released by OpenAI in November 2025, is a coding-specialized model from the GPT-5.1 family engineered for software engineering tasks including code generation, multi-file editing, and agentic development. It targets developers and automated coding pipelines requiring a GPT-5.1-generation model tuned for programming.
+
+
+
+
OpenAI
GPT-5.3 Codex, released by OpenAI in February 2026, is a coding-specialized large language model from the GPT-5.3 family. It targets software engineering workflows including automated code generation, test writing, and agentic multi-file editing, built on the incremental improvements of the GPT-5.3 generation.
3 months newer
GPT-5.1 Codex
OpenAI
2025-11
GPT-5.3 Codex
OpenAI
2026-02
Provider Availability & Performance
Available providers and their performance metrics
+
+
+
+
GPT-5.1 Codex
0 providers
+
+
+
+
GPT-5.3 Codex
0 providers
+
+
+
+
GPT-5.1 Codex
Avg Score:0.0%
Providers:0
+
+
+
+
GPT-5.3 Codex
Avg Score:0.0%
Providers:0