OpenAI is updating ChatGPT's default model GPT‑5.5 instant, available to everyone and GPT-5.5 instant is rolling out starting today to all ChatGPT users

OpenAI's rollout of the GPT-5.5 model may drive stronger engagement and adoption of its services, with potential implications for Microsoft due to their partnership and integration of AI technology.

Newsquawk StaffPublished 5 May 2026, 17:22 UTCOn the live feed at 17:02 UTC — 8 more headlines followed before this page went public

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17:06

Russian Foreign Minister Lavrov holds phone call with US Secretary of State Rubio to discuss international relations and bilateral contacts between Russia and the US

17:04

Honda Motor (HMC) is set to freeze plans to build an EV factory in Canada, Nikkei reports

17:02

OpenAI is updating ChatGPT's default model GPT‑5.5 instant, available to everyone and GPT-5.5 instant is rolling out starting today to all ChatGPT users

17:01

ServiceNow (NOW) reports expansion of partnership with Nvidia (NVDA)

16:56

Banco BPM (BAMI IM) says it considers considers Credit Agricole (ACA FP) and Monte dei Paschi (BMPS IM) as natural M&A targets b ut deals are not necessarily ideal, will wait and see

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Context

While this development may not have immediate market impacts, it highlights the growing competitive landscape in AI-driven software, which could influence investor sentiment towards tech equities, particularly in the software sector.

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