OpenAI Just Made GPT-5.5 the Default ChatGPT Model — Here’s What Changes for Everyone
On May 5, 2026, OpenAI quietly replaced GPT-5.3 Instant with GPT-5.5 Instant as the default model across all ChatGPT user…
On May 5, 2026, OpenAI quietly replaced GPT-5.3 Instant with GPT-5.5 Instant as the default model across all ChatGPT user…