Codex · Agentic AI · OpenAI · OpenAI
As a result, agents are quickly becoming the most powerful AI system for work
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Over the last year, OpenAI witnessed this transformation first-hand at OpenAI.
Key facts
- From December 2025 to May 2026, the share of users who made a request that was estimated to correspond to work that would take a person more than 30 minutes rose to 80.6%
- Research saw the biggest jump: by June 2026, median use was 56 times higher than in November 2025
- By early June 2026, non-developer individual users multiplied 137 times since August 2025
- Through August 2025, the average OpenAI worker spent less than 10% of their tokens on Codex
Summary
Agentic AI changes the unit of knowledge work from single interactions to delegated, long-horizon tasks. Through August 2025, the average OpenAI worker spent less than 10% of their tokens on Codex. Codex adoption grew in tandem with Codex’s capabilities. People use Codex for longer-horizon work. Codex became the primary AI tool for every department at OpenAI. Engineering moved first, but Legal, Finance, and Recruiting crossed into Codex being their primary AI tool around April 2026.