Agent work is not just an access question anymore. It is becoming a runtime budget question.

This brief looks at Microsoft's Copilot Cowork general availability and Work IQ controls, then pairs that with Anthropic's statement that it is removing access to Fable 5 / Mythos 5 to ask a practical operator question:

If an agent can retrieve context, call tools, run longer tasks, and consume metered credits, who owns the budget gate before the work continues?

Run one Agent Runtime Budget Gate by June 24, 2026.

Use:

• Microsoft Copilot Cowork GA: https://www.microsoft.com/en-us/microsoft-365/blog/2026/06/16/copilot-cowork-is-now-generally-available/
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