1 AI Catchup article about Model Update, newest first: 1 news story.
OpenAI's June 2026 update to GPT-5.5 Instant in ChatGPT brought better intent understanding, more reliable handling of complex constraints, and improved shopping and local recommendations. GPT-5.5 Instant was then ChatGPT's default. GPT-5.6 and then GPT-6 Sol and Luna have since replaced it, and GPT-5.5 retires from ChatGPT on October 14, 2026.
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