+
+
+
+
+
+
+
+
VS
VS
VS
VS
VS
VS
GPT-5 Mini vs GPT-5.3 Codex
Comprehensive side-by-side LLM comparison
GPT-5 Mini supports multimodal inputs. Both models have their strengths depending on your specific coding needs.
+
+
+
+
OpenAI
GPT-5 mini, released by OpenAI in August 2025, is a smaller variant from the GPT-5 family that inherits GPT-5's unified reasoning architecture and multimodal capabilities at a reduced inference cost. It targets high-volume production use cases requiring a balance of intelligence and response speed, offering GPT-5 capabilities for applications where full GPT-5 inference costs are a concern.
+
+
+
+
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.
6 months newer
GPT-5 Mini
OpenAI
2025-08
GPT-5.3 Codex
OpenAI
2026-02
Performance Metrics
Context window and performance specifications
Provider Availability & Performance
Available providers and their performance metrics
+
+
+
+
GPT-5 Mini
1 providers
OpenAI
+
+
+
+
GPT-5.3 Codex
0 providers
+
+
+
+
GPT-5 Mini
Avg Score:0.0%
Providers:1
+
+
+
+
GPT-5.3 Codex
Avg Score:0.0%
Providers:0