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 summary
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- New OpenAI launch: GPT-5.5
- Companion higher-accuracy variant: GPT-5.5 Pro
- GPT-5.5 rollout: ChatGPT Plus, Pro, Business, Enterprise; Codex Plus, Pro, Business, Enterprise, Edu, Go
- GPT-5.5 Pro rollout: ChatGPT Pro, Business, Enterprise
- API status: GPT-5.5 and GPT-5.5 Pro are listed as coming very soon
- API pricing: GPT-5.5 at $5 input / $0.50 cached input / $30 output per 1M tokens
- API pricing: GPT-5.5 Pro at $30 input / $180 output per 1M tokens
- API context: GPT-5.5 listed with a 1M context window
- Codex context: GPT-5.5 listed with a 400K context window
- Codex Fast mode: 1.5x token generation speed for 2.5x cost
- Batch and Flex processing are listed at half standard API rate; Priority processing is listed at 2.5x standard rate
- OpenAI says GPT-5.5 has stricter cyber safeguards and treats bio/chemical and cybersecurity capabilities as High under its Preparedness Framework
- Add GPT-5.5 and GPT-5.5 Pro to model catalogs now, but gate API routing until OpenAI confirms API availability.
- Benchmark GPT-5.5 against GPT-5.4 on agentic coding, computer-use, long-context, and document-heavy workflows before changing defaults.
- Update budget policies because GPT-5.5 doubles GPT-5.4 standard input/output prices and Codex Fast mode carries a 2.5x cost multiplier.
- For cybersecurity workflows, review whether trusted-access requirements or stricter safeguards affect internal use cases.
Changes
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Recommended Actions
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Add GPT-5.5 and GPT-5.5 Pro to model catalogs, but keep production API routing disabled until OpenAI confirms API availability.
Benchmark GPT-5.5 against GPT-5.4 on agentic coding, computer-use, long-context, and document-heavy workflows before changing defaults.
Update cost policies for GPT-5.5 standard pricing, half-price Batch/Flex processing, 2.5x Priority processing, and 2.5x Codex Fast mode.
Review cybersecurity and trusted-access requirements if your team uses frontier models for defensive security workflows.
Sources
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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.