Leading the pack has been the rise in agentic coding tools. These tools, such as Gemini Jules, Claude Code, and OpenAI Codex, are capable of writing entire programs and products. I put both Codex and Claude Code to the test, creating four plug-in add-on security products for WordPress using Codex, as well as a full-featured iPhone app using Claude Code.
If there's one thing I want you to take away from this article, it's this: testing harness is the most important thing for vibe-coding. Not prompt engineering, not fancy plugins, just constraining your AI outside AI toolchain. I'm calling it harness because it's not only tests. It's tests, types, linters, and any other automated checks you can put in place. The more you rely on AI, the more harness you need.
Meta remains a digital advertising juggernaut. Its ad revenue soared 24% year over year in Q4 to $58.1 billion. And AI is transforming the company's core ad business, boosting revenue and profits. In Q4, Meta changed the architecture of the GEM model it uses for ad ranking and doubled the number of GPUs used to train the AI model. The results were impressive: a 3.5% increase in ad clicks on Facebook, with a 1%+ increase in ad conversions on Instagram.
Andrej Karpathy is one of AI's guiding figures. He was a founding member of OpenAI and later served as Tesla's director of AI. He also coined the term "vibe coding," the AI-assisted coding movement that has taken software engineering by storm and was named Collins Dictionary's word of the year. In his "random notes from Claude Coding" - which are over 1,000 words long - Karpathy wrote about the changes to his own coding style.
One of the most notable innovations is support for compaction, a technique that enables the model to seamlessly manage multiple context windows and perform tasks involving millions of tokens within a single session. This enables large-scale refactors, extensive debugging rounds, and work cycles lasting several hours. GPT-5.1-Codex-Max is available immediately within the Codex environment in the CLI, IDE extension, and cloud; API access will follow later.
On Tuesday, Google finally launched Gemini 3, which the company claims is the "best model in the world for multimodal understanding and our most powerful agentic and vibe coding model yet." The claim is supported by benchmark data, crowd-sourced Arena results, and more advanced use cases that the chatbot has not previously been able to tackle. Also: Let Gemini make your next slide presentation for you - here's how
Anysphere has introduced Cursor 2.0, an update to the AI coding assistant that features the tool's first coding model, called Composer, and an interface for working with many agents in parallel. Both Cursor 2.0 and Composer were introduced October 29 by the Cursor team at Anysphere. Cursor is a fork of Microsoft's popular Visual Studio Code editor, downloadable at cursor.com for Windows, MacOS, and Linux.
