Claude Fable 5.1 and Mythos 5.1 return 400 for tool_choice any and tool.

Tool routing must avoid any and tool on these models or requests fail before execution.

Keep auto or none unchanged; use strict tool use or structured outputs when schema-conformant inputs matter.

• What is MCP (Model Context Protocol)?
  The open standard for wiring models to tools and data: what it solves, when a plain API is the better answer, and how to secure a server.
• What is an intelligence layer?
  The standing context a company runs on: what goes in it, how it differs from prompts and RAG, and how to keep it from going stale.
• What is AI operations?
  The discipline of running a business on AI, how it differs from AIOps, and what an operations layer actually does.

Nova3 AI builds this kind of system for businesses on the Emerald Coast.

• Sep 05, 2026OpenAI removed model catalog copy naming GPT-5.6 Sol, Terra, and Luna.
• Sep 05, 2026Anthropic removed its Claude compare models table from the model card page
• Sep 05, 2026Google pricing page removed a visible Gemini API navigation and pricing snapshot.

This is the world we build in. It moves this fast. We move with it. Nova3 AI turns frontier shifts like this into running operations for businesses on the Emerald Coast.