Comprehensive side-by-side LLM comparison
. Both models have their strengths depending on your specific coding needs.
OpenAI
GPT-5.2 Codex is a coding-specialized variant from the GPT-5.2 family, designed for software engineering workflows including automated code generation, multi-file editing, and agentic development. It builds on GPT-5.2's improved instruction following and long-context capabilities, with optimizations specifically targeting programming tasks and agentic software workflows.
xAI
Grok 3 mini, released by xAI alongside Grok 3 in February 2025, is a compact reasoning model from the Grok 3 family featuring RL-enhanced Think mode for extended chain-of-thought processing. It features a 131K token context window and targets STEM tasks, mathematics, and coding applications where cost-efficient reasoning with configurable depth is required.
11 months newer

Grok 3 mini
xAI
2025-02-17

GPT-5.2 Codex
OpenAI
2026-01-14
Context window and performance specifications
Available providers and their performance metrics
GPT-5.2 Codex
Grok 3 mini
xAI
GPT-5.2 Codex
Grok 3 mini
GPT-5.2 Codex
Grok 3 mini