+
+
+
+
+
+
+
+
VS
VS
VS
VS
VS
VS
GPT-5 vs GPT-5.3 Codex
Comprehensive side-by-side LLM comparison
GPT-5 supports multimodal inputs. Both models have their strengths depending on your specific coding needs.
+
+
+
+
OpenAI
GPT-5, released by OpenAI on August 7, 2025, is a large language model that combines direct generation and extended reasoning in a single unified system with a built-in routing mechanism. It features a 400K token context window, 128K maximum output tokens, native multimodal support (text, image, audio, video), and demonstrated strong results across coding, mathematics, visual understanding, and health benchmarks at release. GPT-5 targets complex multi-step tasks including advanced coding, mathematical problem solving, and long-context analysis.
+
+
+
+
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.
5 months newer
GPT-5
OpenAI
2025-08-07
GPT-5.3 Codex
OpenAI
2026-02
Performance Metrics
Context window and performance specifications
+
+
+
+
Knowledge Cutoff
Training data recency comparison
GPT-5
2025-05
More recent knowledge cutoff means awareness of newer technologies and frameworks
Provider Availability & Performance
Available providers and their performance metrics
+
+
+
+
GPT-5
1 providers
OpenAI
+
+
+
+
GPT-5.3 Codex
0 providers
+
+
+
+
GPT-5
Avg Score:0.0%
Providers:1
+
+
+
+
GPT-5.3 Codex
Avg Score:0.0%
Providers:0