IBL News | New York
Anthropic revealed that 80%+ of the code merged into its codebase as of May 2026 is authored by Claude. 3 (in February 2025, this number was in the low single digits), while it detailed its progress toward recursive self-improvement and its implications.
“At Anthropic, we are delegating a growing share of AI development to AI systems themselves, which is speeding up our work.”
The company believes that the so-called recursive self-improvement practice – with AI systems capable of fully autonomously designing and developing their own successors— could arrive sooner than most institutions are prepared for.
Today, autonomous agents can now run code themselves and delegate hours of work to other agents.
Systems capable of fully building their own successors would represent a major development in science, healthcare, and beyond, but might increase the risk of humans losing control over AI systems.
In the future, agents could become capable of building and training models themselves. If this happens, future versions of Claude could be continuously improved by Claude itself.
The Anthropic Institute is showing that AI is already accelerating the development of AI systems. To take just one example: today, Anthropic engineers on average ship 8x as much code per quarter as they did from 2021 to 2025.
The technical trends discussed in this piece suggest that AI systems are going to become much more capable in the coming years. These trends have huge implications.
The evidence points out that the rate at which AI models improve is accelerating, with the length of tasks doubling roughly every four months, up from an earlier trend of doubling every seven months.
In March 2024, Claude Opus 3 could complete software tasks that would take humans about 4 minutes. A year later, Claude Sonnet 3.7 managed tasks that would have taken about an hour and a half. A year after that, Claude Opus 4.6 managed 12-hour tasks.1 If this trend holds, tasks that take a skilled person days could come within range this year. In 2027, AI systems could be capable of tasks that take a person weeks.
Our internal data shows Claude is accelerating AI development—a possible path to recursive self-improvement, or AI autonomously building a more capable successor.
It’s happening faster than we thought, and the implications deserve greater attention. https://t.co/OVVPJO7VQx
— Anthropic (@AnthropicAI) June 4, 2026









