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  5. OpenAI Codex MinivsGrok 3
Updated May 2025

OpenAI Codex MinivsGrok 3

OpenAI Codex Mini has a larger context window than Grok 3 (200K tokens vs 128K tokens).

OpenAI Codex Mini and Grok 3 compared across 9 shared prompts
SpecOpenAI Codex MiniGrok 3
Input price$1.5/M tokens—
Output price$6/M tokens—
Context window200K tokens128K tokens
Free API (OpenRouter)NoNo
ReleasedMay 2025Feb 2025
SWE-bench Verified71.3%63.8%
Our Verdict
OpenAI Codex Mini
OpenAI Codex Mini
Grok 3
Grok 3

Not enough votes to call it. On the specs, nothing separates them.

OpenAI Codex Mini takes Image Generation.

Too close to call
API pricing

Cost per 1M tokens

OpenAI Codex Mini
Input
$1.50
Output
$6.00
Grok 3
Input
—
Output
—
Research

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