OpenAI Debuts GPT-5.5 Claiming Agentic Coding and Research Gains

Source: MacRumors

Overview

OpenAI has announced the release of GPT‑5.5, the latest upgrade to the company’s family of models that power 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.

Key Features

• GPT‑5.5 Thinking – “faster help for harder problems.”
• GPT‑5.5 Pro – positioned as a research partner for tougher questions where accuracy matters more than speed.

OpenAI argues that the new model is more token‑efficient, so Codex tasks should finish with less overhead despite the performance bump.

Availability and Plans

• ChatGPT Plus, Pro, Business, and Enterprise subscribers receive GPT‑5.5 Thinking.
• GPT‑5.5 Pro is limited to ChatGPT Pro, Business, and Enterprise tiers.
• In Codex, GPT‑5.5 is available across Plus, Pro, Business, Enterprise, Edu, and Go plans.
• API access is announced to arrive “very soon.”