OpenAI and Anthropic spark coding revolution as builders deserted conventional programming | Fortune – Company Technique & Outlook

Final week, OpenAI and Anthropic dropped their respective coding fashions—GPT-5.3-Codex and Claude Opus 4.6—each of which represented important leaps in AI coding capabilities. GPT-5.3-Codex confirmed markedly greater efficiency on coding benchmarks than earlier fashions, whereas Opus 4.6 launched a characteristic that lets customers deploy autonomous AI agent groups that may deal with totally different facets of complicated tasks concurrently. Each fashions can write, take a look at, and debug code with minimal human intervention—even iterating on their very own work and refining options earlier than presenting outcomes to builders.

The releases—particularly GPT-5.3-Codex—sparked one thing of a web-based existential disaster amongst software program engineers. On the coronary heart of it was a viral essay written by Matt Shumer, CEO of OthersideAI. Shumer stated that “one thing clicked” following the mannequin releases and described AI fashions now dealing with your entire growth cycle autonomously—writing tens of hundreds of traces of code, opening functions, testing options, and iterating till glad, with builders merely describing desired outcomes and strolling away. He proposed that the advances meant that AI may disrupt jobs extra severely than the COVID-19 pandemic.

The essay drew blended reactions. Some tech leaders agreed, together with Reddit co-founder Alexis Ohanian, however others, together with NYU professor Gary Marcus, criticized it as “weaponized hype.” (Marcus famous that Shumer offered no knowledge supporting claims that AI can write complicated apps with out errors.) Fortune’s Jeremy Kahn additionally argued that it was coding’s distinctive traits—like automated testing—that made it simpler to completely automate, whereas the automation of different knowledge-work fields could also be extra elusive.

Software program engineers as early adopters

For a lot of engineers, a few of Shumer’s warnings simply mirror their present actuality. Many engineers say they’ve stopped coding fully, as an alternative counting on AI to write down code at their route.

Whereas the brand new releases do signify significant enhancements, builders additionally stated the trade has been present process a gradual transformation over the previous 12 months as fashions grew to become succesful sufficient to deal with more and more complicated duties autonomously. Whereas builders at main tech firms have largely stopped writing code line-by-line, they haven’t stopped constructing software program—they’ve develop into administrators of AI techniques that do the typing for them. The ability has remodeled from writing code to architecting options and guiding AI instruments. The brand new fashions, some argue, primarily “burst the bubble” round AI coding by making folks exterior coding conscious of a development engineers have been experiencing for months.

Throughout its earnings name this week, Spotify co-CEO Gustav Söderström stated the corporate’s finest builders “haven’t written a single line of code since December.” The streaming large’s inner system makes use of Claude Code for distant deployment, permitting engineers to instruct AI to repair bugs or add options through Slack on their telephones throughout their commute, then merge accomplished work to manufacturing earlier than reaching the workplace. Söderström stated Spotify shipped over 50 new options in 2025 utilizing these workflows.

Even inside Anthropic, engineers are closely counting on their very own instruments to write down new code. Boris Cherny, head of Claude Code, stated earlier this month that he hasn’t written code in over two months. Anthropic beforehand instructed Fortune that 70% to 90% of the corporate’s code is now AI-generated.

The fashions themselves have additionally reached a recursive milestone: They’re now materially serving to to construct extra superior iterations of themselves. OpenAI stated GPT-5.3-Codex “is our first mannequin that was instrumental in creating itself,” a major shift in how AI growth works. Equally, Anthropic’s Cherny stated his group constructed Claude Cowork—a non-technical model of Claude Code for file administration—in roughly every week and a half, largely utilizing Claude Code itself. Even for Claude Code, Cherny stated about 90% of its personal code is now written by Claude Code.

Regardless of the productiveness positive aspects, some builders are additionally warning that the brand new instruments may lead to burnout. Steve Yegge, a veteran engineer, stated that AI instruments have been draining builders via overwork.

In a extensively shared blogpost, Yegge described falling asleep abruptly after lengthy coding periods and colleagues contemplating putting in nap pods at their workplace. The addictive nature of AI coding instruments, he argues, is pushing builders to tackle unsustainable workloads. “With a 10x enhance, when you give an engineer Claude Code, then as soon as they’re fluent, their work stream will produce 9 further engineers’ value of worth,” he wrote. However “constructing issues with AI takes a whole lot of human power.”