Agentphasic sleep
Agentphasic sleep or when model capacity outpaces human time
“post-AGI, no one is going to work and the economy is going to collapse,” Sam Altman posted on X. “i am switching to polyphasic sleep because GPT-5.5 in codex is so good that i can’t afford to be sleeping for such long stretches and miss out on working.” [1]
As agents became more capable, many developers had begun treating sleep as just another constraint to optimize, Matt Wiese among them. He rebuilt his nights around Claude Pro’s five-hour reset window, napping when his tokens ran out and returning to his desk when they refreshed, borrowing the technique from solo sailors who sleep in bursts of under thirty minutes near busy shipping lanes, alert enough to change course, never fully off watch. [2]
Wes McKinney, the creator of the pandas data analysis library, had been sleeping 7-8 hours a night before coding agents took two of them. [3] He wrote in his essay The Mythical Agent Month “Now when I’m rolling around restlessly in bed at 5:07am with ideas to feed my AI coding agents, I just get up and start my day.”
On X, developer Dev Shah coined the term for this new reality: “i’m living on the agentphasic sleep. only claude code and codex hitting limits can put me in REM sleep. i only rest during the compute.” [4]
Amid all the bragging about velocity and 10x productivity gains, one Hacker News commenter noted: “This goes along with my current theory about how people are getting 10x results using LLMs: they’re putting in 10x the time.” [5]
Sources
[1] Altman, S. [@sama]. (2026, April 26). [Post]. X.
[2] Wiese, M. (2025, August 10). Optimizing my sleep around Claude usage limits. mattwie.se. https://mattwie.se/no-sleep-till-agi
[3] McKinney, W. (2026, February 17). The mythical agent-month. wesmckinney.com. https://wesmckinney.com/blog/mythical-agent-month/
[4] Shah, D. [@0xDevShah]. (2026, April). [Post]. X.
[5] globular-toast. (2025, August). Comment on “Optimizing my sleep around Claude usage limits.” Hacker News. https://news.ycombinator.com/item?id=44860015