The new GPT-5.5 Instant model will replace GPT-3.5 Instant as the default model for ChatGPT ...

OpenAI has rolled out GPT-5.5 Instant as ChatGPT's default model, adding memory-source controls, personalization tools, and a ...

OpenAI has launched a research preview of GPT-5.3-Codex-Spark, a specialized low-latency model optimized for real-time coding via Cerebras. Last month, OpenAI announced a partnership with Cerebras, an ...

OpenAI has released GPT‑5.4 across ChatGPT, its API, and Codex, positioning it as its most capable model for professional tasks. The update merges GPT‑5.3‑Codex’s coding strengths with enhanced ...

OpenAI makes GPT‑5.5 Instant ChatGPT’s default, cutting hallucinations and boosting personalization with memory sources.

What if your coding assistant could not only write better code but also improve itself in the process? That’s the promise of GPT-5.3 Codex, OpenAI’s latest leap in AI development. Paul Solt explains ...

OnenAI rolls out GPT 5.5 Instant on Tuesday as a default for Plus and Pro users on the web. The company said the new model will have fewer hallucinated claims and will now show where its responses are ...

Instant with fewer errors ...

GPT-5.3 Instant is now live inside ChatGPT and available immediately for developers via the API under the name “gpt-5.3-chat-latest.” This update marks the beginning of the end for the previous ...

GPT-5.5 Instant is the updated default model focused on improving factual reliability, reasoning ability, and everyday task ...

OpenAI has quietly delivered one of the most noticeable upgrades to ChatGPT in recent memory. As of May 5, 2026, GPT-5.5 Instant is now the default model for all logged-in ChatGPT users worldwide, ...