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The ChatGPT browser is here
Plus: Anthropic’s interactive prompt engineering tutorial, Andrej Karpathy says human-level AI is way off, and more
Michael Cunningham
October 23, 2025
In partnership with
Edition 130 | October 23, 2025
with more code being written by voice and agents, suddenly a real market is emerging for phone-based developer environments
— Braelyn ⛓️ (@braelyn_ai)
3:57 PM • Oct 20, 2025
Finally, the rest of us can achieve a level of productivity only the most dedicated and daring programmers enjoyed before: coding on the toilet.
Welcome back to Building AI Agents, your biweekly guide to everything new in the field of agentic AI!
In today’s issue…
OpenAI releases a ChatGPT browser
LangChain hits a $1.25 billion valuation
Anthropic’s interactive prompt engineering tutorial
Andrej Karpathy says human-level AI is way off
The rise of deep agents
🎓 Reminder: Join our free webinar on Building Your Own Email Agent today @ 4pm CT
…and more
🔥 IN CASE YOU MISSED IT
Readers’ favorite items from the past week
‼️ ESSENTIAL NEWS
Source: BBC
On Monday, OpenAI rolled out Atlas, a browser fully integrated with ChatGPT, which includes the ability to summarize and ask questions about webpages, remember crucial information from them, and offer personalized suggestions for other sites to visit. Atlas is free for all users, but a more advanced agent mode powered by ChatGPT Agent that can perform tasks like booking appointments and planning events is available only to paying ChatGPT subscribers.
Other companies like Perplexity and Opera have released agentic browsers, and Google is moving in that direction, but Atlas is by far the most significant step towards fully agent-powered browsing that any major company has taken so far.