Software Engineering

In February 2025, Andrej Karpathy posted a tweet that most engineers scrolled past: “There’s a new kind of coding I call ‘vibe coding’, where you fully give in to the vibes, embrace exponentials, and forget that the code even exists… I just see stuff, say stuff, run stuff, and copy-paste stuff.” Most senior engineers read it and moved on. “A prototyping trick. Nothing serious.” They were wrong. Fifteen months later, 63% of users of AI coding tools are non-technical. CEOs are building internal systems with Claude prompts. PMs are replacing Excel with automated dashboards. BAs are creating workflow automation without touching a codebase. And critically — they are shipping those things to production. ...

Answer-first: Discover what vibe coding is, why AI prototypes hit a Production Wall, and why AI code review is a critical skill for modern software engineers. In February 2025, Andrej Karpathy, former Tesla AI Lead and OpenAI co-founder, tweeted a phrase that would define a new paradigm in software development: “There’s a new kind of coding I call ‘vibe coding’, where you fully give in to the vibes, embrace exponentials, and forget that the code even exists.” ...

Anthropic shipped two things this week that reframe how engineering teams will build AI agents. First, Claude Sonnet 4.5 — explicitly labeled “the best coding model in the world” — with substantial gains in reasoning, math, and computer use. Second, and more consequentially for platform teams, they open-sourced the Claude Agent SDK: the actual infrastructure that powers their frontier products. This is not an incremental model update. It is a strategic move to own the infrastructure layer of the emerging agent ecosystem, positioning Anthropic as both the model provider and the toolchain standard for complex agentic systems. ...

DeepSeek officially released the DeepSeek-V4 model series this week, continuing its trend of delivering frontier-level capabilities at a fraction of the computing cost. Released under the open-source MIT License, this update introduces two main model variants designed for high efficiency, long context, and agentic workflows. After reviewing the release announcement and technical details, it is clear that DeepSeek is no longer just competing on price — they are actively shaping how open-source models integrate into complex, multi-agent command centers and enterprise environments. ...

OpenAI shipped two things this week that belong together: the Codex desktop app for macOS (with Windows following in March) and GPT-5.2-Codex, a version of GPT-5.2 further optimized for agentic coding. After reading the full source material from both announcements, the picture that emerges is not an incremental model update. It is a deliberate architectural shift in how OpenAI thinks about the relationship between developers and AI agents. The framing in the Codex app announcement is precise: “The core challenge has shifted from what agents can do to how people can direct, supervise, and collaborate with them at scale.” That is a meaningful statement. It acknowledges that the bottleneck is no longer model capability — it is the tooling for managing agents at the scale that frontier models now make possible. ...