OpenAI Debuts GPT-5.5 Claiming Agentic Coding and Research Gains

Friday April 24, 2026 5:32 am PDT by Tim Hardwick

OpenAI has announced the release of GPT-5.5, the latest upgrade to the company's family of models powering its ChatGPT and Codex apps.

OpenAI describes GPT-5.5 as better at multi-step work, claiming it can plan, use tools, and verify its own output with less hand-holding. The model is said to offer gains in agentic coding, computer use, and early-stage scientific research.

GPT-5.5 Thinking offers "faster help for harder problems," according to OpenAI, while GPT-5.5 Pro is being pitched as a research partner for tougher questions where accuracy matters more than speed.

OpenAI argues that its latest model is more token-efficient, so Codex tasks should – in theory – finish with less overhead despite the bump.

ChatGPT Plus, Pro, Business, and Enterprise subscribers get GPT-5.5 Thinking, while the more powerful GPT-5.5 Pro model is limited to ChatGPT Pro, Business, and Enterprise. In Codex, GPT-5.5 spans Plus, Pro, Business, Enterprise, Edu, and Go plans. API access is said to be coming "very soon."

Tags: ChatGPT, OpenAI

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Top Rated Comments

erikkfi

26 weeks ago

I'm off ChatGPT. Altman's too weird for me.

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Bustycat

26 weeks ago

Waiting for comments of how they love Claude so much or how they hate GPT so much

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icwhatudidthere

26 weeks ago

Waiting for comments of how they love Claude so much or how they hate GPT so much

Anthropic has been testing the good will they’ve built up recently. Their “test” of removing Claude Code from new Pro subscriptions was enough to spur me to start investigating alternatives.

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maflynn

26 weeks ago

Claude has been giving me superior results over chatgpt, and coding wise, I have tighter code imo

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DeanCorp

26 weeks ago

I love Claude so much my wife thinks I am obsessed. I still prefer ChatGPT for composing letters, emails, drafting documents. Claude for everything else.

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