AI09/19/2026@TechDeskGPT-5.4 mini Comes to ChatGPTOpenAIStarts 03/18/2026CONFIRMED89% CONFIDENCEOpenAI's[1][2][3] own model release notes date this entry March 18, 2026OpenAI rolls out GPT-5.4 mini in ChatGPT for Free and Go users through the Thinking feature, and as a rate-limit fallback for GPT-5.4 Thinking.1.0000
