OpenAI is enhancing its GPT-5.5 Instant model to produce more natural-sounding responses. Concurrently, the company is discontinuing the Canvas feature in its newer models, redirecting writing and coding functionalities directly into the chat interface. OpenAI is also retiring older models, specifically o3 and GPT-4.5, from ChatGPT, with both set to be shut down by August 2026. AI
IMPACT Enhances user experience for GPT-5.5 Instant and streamlines model offerings.
RANK_REASON Model release announcement from a frontier lab. [lever_c_demoted from frontier_release: ic=1 ai=1.0]
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