+
+
+
+
+
+
+
+
VS
VS
VS
VS
VS
VS
GPT-5.3 Codex vs Grok 2
Comprehensive side-by-side LLM comparison
Grok 2 supports multimodal inputs. Both models have their strengths depending on your specific coding needs.
+
+
+
+
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.
+
+
+
+
xAI
Grok 2, released by xAI in August 2024, is a large language model with 131K token context window and native image understanding, developed with access to real-time information from the X platform. It features multimodal input capabilities and improved reasoning over its predecessor. Grok 2 targets conversational assistants, image analysis, and real-time information retrieval tasks via the xAI API.
1 year newer
Grok 2
xAI
2024-08-14
GPT-5.3 Codex
OpenAI
2026-02
Performance Metrics
Context window and performance specifications
Provider Availability & Performance
Available providers and their performance metrics
+
+
+
+
GPT-5.3 Codex
0 providers
+
+
+
+
Grok 2
1 providers
xAI
+
+
+
+
GPT-5.3 Codex
Avg Score:0.0%
Providers:0
+
+
+
+
Grok 2
Avg Score:0.0%
Providers:1