OpenAI says Codex and Work changes raise effective usage via context reuse and caching

OpenAI says it has improved Codex and Work to increase the effective usage users get.

Tibo (@thsottiaux), an OpenAI employee, announced the changes on X on October 16, 2026. He says the company reuses context across subagents, keeps context cached longer, and routes requests more effectively to raise cache hits.

The post does not give figures for the change in usage or cache hit rates.