+
+
+
+
+
+
+
+
VS
VS
VS
VS
VS
VS
GPT-5.1 vs GPT-5.1 Codex
Comprehensive side-by-side LLM comparison
GPT-5.1 leads with 2.6% higher average benchmark score. GPT-5.1 supports multimodal inputs. Both models have their strengths depending on your specific coding needs.
+
+
+
+
OpenAI
GPT-5.1, released by OpenAI in November 2025, is a large language model from the GPT-5 family that delivers incremental improvements in reasoning, instruction following, and multimodal understanding over GPT-5. It features a 400K token context window and targets general-purpose development, long-context analysis, and agentic workflows.
+
+
+
+
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.
Launched on the same date
GPT-5.1
OpenAI
2025-11
GPT-5.1 Codex
OpenAI
2025-11
Average performance across 1 common benchmarks
+
+
+
+
GPT-5.1
Average Score:76.3%(+2.6%)
+
+
+
+
GPT-5.1 Codex
Average Score:73.7%
Performance comparison across key benchmark categories
+
+
+
+
GPT-5.1
Coding76.3%(+2.6%)
+
+
+
+
GPT-5.1 Codex
Coding73.7%
Provider Availability & Performance
Available providers and their performance metrics
+
+
+
+
GPT-5.1
0 providers
+
+
+
+
GPT-5.1 Codex
0 providers
+
+
+
+
GPT-5.1
Avg Score:76.3%(+2.6%)
Providers:0
+
+
+
+
GPT-5.1 Codex
Avg Score:73.7%
Providers:0