OpenAI introduced GPT-5.5 for ChatGPT, Codex, and upcoming API access
OpenAI introduced GPT-5.5 on April 23, 2026 as its smartest model for agentic coding, computer use, knowledge work, and research. GPT-5.5 is rolling out to Plus, Pro, Business, and Enterprise users in ChatGPT and Codex, while GPT-5.5 Pro is rolling out to Pro, Business, and Enterprise users in ChatGPT. OpenAI says both GPT-5.5 and GPT-5.5 Pro will come to the API very soon, with pricing listed at $5 input / $0.50 cached input / $30 output per 1M tokens for GPT-5.5 and $30 input / $180 output per 1M tokens for GPT-5.5 Pro.
Impact Assessment
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OpenAI announced GPT-5.5 on April 23, 2026 and described rollout across ChatGPT and Codex, with API access coming soon.
The availability section lists ChatGPT and Codex rollout, Codex Fast mode, 400K Codex context, API pricing, and 1M API context for GPT-5.5.
OpenAI pricing lists GPT-5.5 as coming soon with $5 input, $0.50 cached input, and $30 output per 1M tokens.
OpenAI says GPT-5.5 adds stricter cyber safeguards and treats bio/chemical and cybersecurity capabilities as High under its Preparedness Framework.
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