New model addresses hallucination in sensitive areas, improves performance on benchmarks and enhances context management.
OpenAI has released GPT-5.5 Instant as the new default model for ChatGPT, replacing GPT-5.3 Instant. The company highlights that this update addresses a key issue with hallucination in sensitive areas such as law, medicine, and finance. By maintaining low latency, users can expect more accurate and reliable results.
The performance of GPT-5.5 Instant has been showcased on several benchmarks, including the AIME 2025 math test, where it achieved an impressive score of 81.2, compared to 65.4 for its predecessor. Additionally, it outperformed the older model on the MMMU-Pro multimodal reasoning benchmark with a score of 76.0 versus…
One of the most significant enhancements in GPT-5.5 Instant is its improved context management capabilities. This new feature allows users to access past conversations, files, and Gmail to give more personalized answers. Currently available on web for Plus and Pro users, OpenAI plans to roll it out to mobile soon an…
A notable aspect of GPT-5.5 Instant is its ability to display memory sources across all models. This feature enables users to understand where the generated answers come from. Users can delete outdated sources or correct them if the answer was incorrect. However, it’s worth noting that shared chats will not reveal t…
What matters
- GPT-5.5 Instant reduces hallucination in law, medicine, and finance, maintaining low latency
- Model achieves improved scores on AIME 2025 math test (81.2) and MMMU-Pro multimodal reasoning benchmark (76.0)
- New feature allows users to access past conversations, files, and Gmail for personalized answers
Why it matters
New feature allows users to access past conversations, files, and Gmail for personalized answers
This GenAI News article was prepared in original wording using reporting and materials published by TechCrunch AI. Source reference: https://techcrunch.com/2026/05/05/openai-releases-gpt-5-5-instant-a-new-default-model-for-chatgpt/.
Drafted by the GenAI News review pipeline.