AI models will quickly automate the majority of expert work, but they will struggle with the final, most complex 25%. For a long time, human expertise will be essential for this 'last mile,' making it the ultimate bottleneck and source of economic value.

AI agents will automate execution tasks at machine speed, nullifying the old business mantra that "execution is strategy." A firm's value will no longer come from *doing* things efficiently, but from the uniquely human ability to think big picture, choose the right goals, and make high-quality strategic judgments.

The common fear of AI eliminating jobs is misguided. In practice, AI automates specific, often administrative, tasks within a role. This allows human workers to offload minutiae and focus on uniquely human skills like relationship building and strategic thinking, ultimately increasing their leverage and value.

The key to AI's economic disruption is its "task horizon"—how long an agent can work autonomously before failing. This metric is reportedly doubling every 4-7 months. As the horizon extends from minutes (code completion) to hours (module refactoring) and eventually days (full audits), AI agents unlock progressively larger portions of the information work economy.

AI agents can now reliably complete tasks that take a human several hours. With a seven-month doubling time for task complexity, these agents are on track to autonomously handle a full eight-hour workday by the end of 2026, signaling a dramatic shift in the future of work.

All-AI organizations will struggle to replace human ones until AI masters a wide range of skills. Humans will retain a critical edge in areas like long-horizon strategy and metacognition, allowing human-AI teams to outperform purely AI systems, potentially until around 2040.

Julian Schrittwieser, a key researcher from Anthropic and formerly Google DeepMind, forecasts that extrapolating current AI progress suggests models will achieve full-day autonomy and match human experts across many industries by mid-2026. This timeline is much shorter than many anticipate.

The initial impact of AI on jobs isn't total replacement. Instead, it automates the most arduous, "long haul" portions of the work, like long-distance truck driving. This frees human workers from the boring parts of their jobs to focus on higher-value, complex "last mile" tasks.

Unlike past technological shifts where humans could learn new trades, AI is a "tractor for everything." It will automate a task and then move to automate the next available task faster than a human can reskill, making long-term job security increasingly precarious for cognitive labor.