GoKawiilChatGPT should feel “smarter and more accurate” starting today, according to OpenAI. That’s because the company is replacing the default model with an update called GPT-5.5 Instant. OpenAI also says the model upgrade cuts back on the “gratuitous emojis” in responses.
GPT-5.5 Instant is the new default ChatGPT model
GPT-5.5 Instant arrives on May 5 (5/5), which is two months since the last version upgrade to GPT-5.3 Instant on March 3.
While the previous Instant model version promised to make ChatGPT less cringe, the new version focuses on accuracy and being concise.
OpenAI specifically calls out a departure from too much emoji use:
With this update, the model’s responses are tighter and more to-the-point without losing substance, while keeping the warmth and personality that makes ChatGPT enjoyable to use. It can deliver the same information, often with more utility than previous models, while reducing the verbosity and overformatting that can make responses too long. It also asks fewer unnecessary follow-up questions and avoids things that can make responses feel cluttered, like gratuitous emojis.
Critically, OpenAI claims the model enhancement also leads in accuracy with fewer hallucinations, or made-up facts in responses:
Instant is now more dependable, with significant improvements in factuality across the board and the largest gains in domains where accuracy matters most. In internal evaluations, GPT‑5.5 Instant produced 52.5% fewer hallucinated claims than GPT‑5.3 Instant on high-stakes prompts covering areas like medicine, law, and finance. It also reduced inaccurate claims by 37.3% on especially challenging conversations users had flagged for factual errors.
GPT-5.5 Instant replaces GPT-5.3 Instant with the rollout happening for all users starting today. Paid users will continue to have access to GPT-5.3 Instant for three months.
Last month, OpenAI enhanced ChatGPT and Codex with the release of GPT-5.5 Thinking and Pro, two models it calls “a new class of intelligence for real work.”
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