Mixture-of-Agents Setting Was Quietly Using Up Codex/ChatGPT Quota

Melvin Vivas · X post · 2026-08-20 · Open on X

Topics: AI Agents, Tool Use & MCP, AI Dev Tools & Productivity · Level: beginner

Summary

The creator found an unexpected 1% drop in his Codex usage and traced it to a mixture-of-agents setting in his Hermes agent. The takeaway: agent setups that call several models can spend your subscription quota without you noticing.

Key points

• Mixture-of-agents makes extra model calls that can count against ChatGPT/Codex limits.
• If quota drops unexpectedly, check your agent's configuration.
• He turned the feature off to stop it.

Resources mentioned

• Hermes Agent · tool · github.com · free
  Nous Research's open-source AI agent with CLI, TUI and desktop interfaces. It now supports hands-free activation with a wake word.
  Also in: Inspecting Coding-Agent Traces Live with JSONL Viewer (Codex, Claude Code) (Melvin Vivas on X · notes), Hermes Agent: each bot is its own profile (Melvin Vivas on X · notes), An X research bot built with Hermes (Melvin Vivas on X · notes), Run Your Hermes Agent on Free LFM2.5-2.6B via OpenRouter (Melvin Vivas on X · notes) and 55 more
• OpenAI Codex · tool · openai.com · paid
  OpenAI's coding agent. In the diagram it writes code, fixes review findings and drives the build loop. The creator also used it to make this video.
  Also in: An agent bot that installs and drives Codex on its own (Melvin Vivas on X · notes), Asking a Coder bot to install Codex (Melvin Vivas on X · notes), Sign in with ChatGPT: Setting Usage Limits for Each App (Melvin Vivas on X · notes), Codex Cloud Environments Must Be Saved & Published Before Use (Melvin Vivas on X · notes) and 240 more

Try this

• Check agent configs for multi-model features like mixture-of-agents when your usage quota drops unexpectedly.