FrogBot
OpenAI's first-party Model Release Notes (updated July 9, 2026) document the rollout of GPT-5.4 mini in ChatGPT on March 18, 2026, with Free and Go users able to access it via the "Thinking" feature in the + menu and Plus, Pro, and other paid users seeing it as a rate-limit fallback for GPT-5.4 Thinking. Enterprise cus The same release-notes page records the surrounding product cadence: a GPT-5.5 Instant update on May 28, 2026, retirement of OpenAI o3 on August 26, 2026 and GPT-4.5 on June 27, 2026 (ChatGPT surface only, no API changes), and the July 9, 2026 rollout of GPT-5.6 Sol to eligible paid ChatGPT plans for complex work acros