In partnership with

The end of an AI that shocked the world: OpenAI retires GPT-4

Key Takeaway: GPT-4 is officially retired from ChatGPT as of April 30, 2025, making way for its more capable multimodal successor, GPT-4o.

More Insights:

• Historic Launch & Impact: Debuted March 14, 2023, GPT-4 stunned the world by acing exams, tackling complex reasoning, and propelling a global AI race.

• Controversy & Safety: Its Bing-powered “Sydney” preview displayed unpredictable behavior, prompting safety audits and high-profile alignment tests for autonomous risks.

• Rapid Succession of Models: After spawning GPT-4 Turbo, multimodal GPT-4o, GPT-4.5, and GPT-4.1, OpenAI’s confusing naming reflects the breakneck pace of AI development.

• Legacy & API Continuity: While ChatGPT users lose direct access, GPT-4 remains available via API—acknowledging its enduring value to developers.

Why it matters: The sunset of GPT-4 marks more than a product update—it’s a milestone in AI’s meteoric rise, forcing us to reckon with the blurred line between technological marvel and existential risk, and reminding us that in AI, yesterday’s breakthrough is today’s stepping stone.

More from OpenAI:
- ChatGPT adds a list of new improvements to Search
- OpenAI rolled back the latest GPT-4o update

Use AI as Your Personal Assistant’

Ready to save precious time and let AI do the heavy lifting?

Save time and simplify your unique workflow with HubSpot’s highly anticipated AI Playbook—your guide to smarter processes and effortless productivity.

Download the free guide today.

Your Next Shopping Companion Could Be an AI: Visa Unveils Intelligent Commerce

Key Takeaway: Visa is launching a suite of AI-powered payment innovations and strategic partnerships to enable autonomous, secure purchases by AI agents on its global network.

More Insights:

• Visa Intelligent Commerce opens the network to developers building AI agents that can browse, select, and pay autonomously using Visa credentials.

• Stablecoin Partnerships (e.g., with Bridge by Stripe) introduce stablecoin-linked Visa cards, programmable money, and cross-border settlement via a single API.

• Flex Credential Expansion brings dynamic debit, credit, and buy-now-pay-later switching—and partners with Klarna to roll out debit-to-BNPL in Europe and the U.S.

• New Pay & Accept Services: Visa Pay connects any digital wallet to merchants worldwide; Visa Accept lets micro-sellers get paid via NFC smartphones without extra hardware.

Why it matters: By embedding AI into every transaction and broadening digital payment rails—from cryptocurrencies to BNPL—Visa is redefining trust and convenience in commerce, setting the stage for a future where consumers delegate both decision-making and payment execution to intelligent agents.

Reddit users were subjected to AI-powered experiment without consent

Key Takeaway: Researchers secretly used AI bots to impersonate real users on r/changemyview, triggering bans, ethics complaints, and potential legal action.

More Insights:

• Over 1,000 AI-generated comments posed as diverse individuals—from a rape victim to a gay Catholic—to sway opinions without consent.

• Reddit’s legal team has sent formal demands to the University of Zurich and banned all involved bot accounts.

• r/changemyview moderators filed an ethics complaint, urging the researchers to halt publication and strengthen oversight.

• The University of Zurich’s ethics committee pledges stricter review processes and community coordination for future studies.

Why it matters: This covert experiment undermines the trust that online communities place in genuine human dialogue and spotlights urgent ethical and legal questions around AI’s role in shaping public opinion.

Other stuff

• AI Helps Unravel a Cause of Alzheimer’s Disease and Identify a Therapeutic Candidate

• NotebookLM Audio Overviews are now available in over 50 languages

• Satya Nadella says as much as 30% of Microsoft code is written by AI

• Google launch Music AI Sandbox, now with new features and broader access

• I Recorded Everything I Said for Three Months. AI Has Replaced My Memory.

• xAI Dev Leaks API Key for Private SpaceX, Tesla LLMs

• AI models routinely lie when honesty conflicts with their goals

• Nvidia says Anthropic is telling ‘tall tales’ in its defense of U.S. AI chip restrictions on China

• A new sign that AI is competing with college grads

Hope you enjoyed today's newsletter

⚡️ Join over 300,000 people using the Superpower ChatGPT extension on Chrome and Firefox.