
Advanced AI coding models have become better than most human software engineers.
A developer rewrote his entire API from Node.js to Go in two hours using Claude Fable 5, a project that would have cost $50,000 and six months in 2021.
The shift makes senior engineers much more productive rather than eliminating them entirely.
What happened
Author Nikolai Tschacher reports that advanced AI models like Claude Fable 5 and Opus 4.5 (released around November 2025) have reached a point where they can write production-quality code without human review. In a concrete example, he rewrote his IP API software from Node.js to Go in two hours using Claude Fable 5, a task that would have cost a software consultancy agency $50,000 and six months of work five years ago.
Why it matters
Senior software engineers are becoming dramatically more productive — able to improve codebases that previously would have needed five employees — while junior programmers may no longer be needed. The author states that best current models are now better than roughly 98% of professional software engineers and much faster as well, suggesting a fundamental shift in how software work is organized rather than mass job displacement yet.
What to watch
The article raises uncertainty about whether AI development will accelerate further (reaching recursive self-improvement and AGI) or stall due to safety concerns. The Mythos/Fable model released in February 2026 remains state-of-the-art as of August 2026 and had to be evaluated by the US government before release due to discovery of hundreds of zero-day vulnerabilities, suggesting possible slowed release cycles among leading labs.
Ask the AI about this article →
The article is written as a first-person account by Nikolai Tschacher, founder of the IP API service ipapi.is, reflecting on how his own software work has transformed since adopting AI tools in November 2022. He traces the trajectory of AI capability: early ChatGPT (late 2022) could write creative poetry and humor; by 2023–2024 it became genuinely useful for partial code assistance; and by November 2025, models like Opus 4.5 reached a threshold where they produce code as reliable as an experienced engineer, making human review unnecessary. The concrete example of his Node.js-to-Go rewrite anchors this claim: what would have required a software consultancy's six-month, $50,000 project in 2021 now costs $500 in AI tokens and two hours of developer time. The author observes that this does not eliminate senior engineers but amplifies their productivity — they become orchestrators of AI systems rather than code writers. However, he notes an apparent slowdown in AI model releases: Mythos/Fable (February 2026) remains competitive seven months later in August 2026, possibly because the US government evaluated it and found hundreds of zero-day vulnerabilities before its release, suggesting that leading AI labs may be proceeding more cautiously. The article hints that if this cautious approach continues, open-source and international competitors may eventually catch up, commoditizing AI; if it does not, the next frontier could be recursive self-improvement and AGI, raising containment questions.
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