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Cursor errors / Config

This model does not support tools. Please select a different model and try again

platform: Cursor / category: Config / versions: 1.2.2

Cause

Agent mode routed a request to a model (e.g. o3) that does not expose a tool-calling API, often triggered automatically after the previous model hit a usage limit mid-session.

Fix

Restart Cursor to clear the stale model assignment. If it recurs, open Settings > Models and explicitly select a tool-capable model (claude-3-7-sonnet, gpt-4o) before starting an agent session. Avoid relying on automatic model fallback near usage limits.

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