Seven AI stories from the week to 18 October 2026 that matter if you use AI tools at work.
OpenAI added editable Slides to ChatGPT on 16 October for eligible Pro, Business and Enterprise accounts, with collaboration and export, including to PowerPoint on the web. Access is still rolling out.
Why it matters: Dedicated presentation tools now compete with a feature inside ChatGPT. If you already pay for ChatGPT, try it before buying a separate tool.
Google expanded Gemini 4 Argon to its paid API and to Pro and Ultra subscribers in the Gemini app and AI Mode on 13 October. API pricing was reported at $2 per million input tokens and $10 per million output tokens.
Why it matters: Expect the AI tools you use to start offering Argon as a model option over the coming weeks.
Source: AI Weekly, Lilach Bullock
OpenAI said GPT-4o, GPT-4o mini, GPT-4.1 and GPT-4.1 mini will be retired from its API on 14 January 2027, with GPT-6 Luna as the recommended replacement.
Why it matters: If a tool or automation you rely on is built on these models, ask the vendor about their upgrade plan before January.
Source: Lilach Bullock
OpenAI said ChatGPT can now use your open Chrome tabs, through its browser extension and desktop app, to answer questions and complete tasks, with per-site permissions.
Why it matters: Useful for research across several pages, but check which sites you allow it to access.
Source: FourWeekMBA
YouTube Music is rolling out three labels: Fully Gen AI, Partly Gen AI and No Gen AI. AI-generated songs remain eligible for monetisation, according to TechCrunch.
Why it matters: A sign that platforms are moving towards labelling AI content rather than banning it.
Source: AI Weekly
The EU AI Office has reportedly opened its first investigations under the AI Act, into OpenAI and Anthropic. Details were limited at the time of writing.
Why it matters: The EU AI Act is starting to be enforced. UK businesses selling into the EU should keep an eye on it.
Source: AI Weekly
Twenty of the most valuable AI and semiconductor stocks shed more than $1 trillion in market value in the week to 15 October, amid worries about AI funding, CNBC reported.
Why it matters: Market jitters don't change the tools you use today, but they may slow price cuts and new launches.
Source: CNBC
We summarise each story in our own words and link to where we found it. If we've got something wrong, please tell us.