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GPT-5.2-Codex vs Grok Build 0.1

OpenAI vs xAI — benchmarks, pricing, and capabilities side by side.

  • Grok Build 0.1 is cheaper ($1.00 vs $1.75 per 1M input)
  • GPT-5.2-Codex has a larger context window (400K)
GPT-5.2-CodexGrok Build 0.1
Intelligence index89.9
DeveloperOpenAIxAI
TypeMultimodalMultimodal
AccessAPI onlyAPI only
Context window400,000 tokens256,000 tokens
Input price$1.75 / 1M$1.00 / 1M
Output price$14.00 / 1M$2.00 / 1M
Speed106 tok/s
ReleasedJanuary 14, 2026May 20, 2026
Parameters
Input modalitiesText, ImageText, Image
Output modalitiesTextText