GPT-5.6 Luna

Everything Fervor AI has published that touches GPT-5.6 Luna — 4 pieces, newest first.

• Codex Multi-Agent V2 Rejects Your Cheapest Subagent, and Your Config File Can't Override It

  Codex resolves which models you may delegate to from a static server-side model catalog rather than from your config, so a documented setting can be true, effective at…

• Encrypted Reasoning Blocks Were Never Private. A Cheaper Sibling Model Reads Them Out Loud.

  Encrypted reasoning blocks are interchangeable across models inside one provider family, so a cheap sibling will transcribe a frontier model's hidden thinking verbatim,…

• GPT-5.6 Luna Got 80% Cheaper. Amazon's $1.8 Million Overrun Is the Same Story.

  A cheaper token buys more loops rather than a smaller bill, and because a runaway agent produces an invoice instead of an exception, the only ceiling that works is a…

• Briefing · July 30, 2026 · afternoon

  Three unrelated shipments on the same day attacked the price of a token from opposite ends, vendor price cuts, enterprise spend guardrails, and a local runtime that…