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Cursor IDE unexpectedly uses Claude 3 Opus for subagents

A user on Reddit reported an issue with the Cursor IDE where it appears to be using Anthropic's Claude 3 Opus model for subagents, even when the "Auto" mode is turned off and a specific model, Cursor Grok 4.5, is selected. This behavior led to unexpectedly high token consumption for the user. The user expected Cursor to exclusively use the selected Cursor Grok 4.5 model for all operations, including subagents, rather than defaulting to a more expensive model like Opus 5. AI

IMPACT Highlights potential integration issues and unexpected costs when using multiple AI models within development tools.

RANK_REASON User-reported issue with a specific software product's AI model integration.

Read on r/cursor →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

Cursor IDE unexpectedly uses Claude 3 Opus for subagents

COVERAGE [1]

  1. r/cursor TIER_2 English(EN) · /u/Live_Caramel8153 ·

    Cursor Grok 4.5 selected (NOT Auto) but it's using Opus 5 for subagents?

    <!-- SC_OFF --><div class="md"><p>Anyone else have this problem?</p> <p>I have Auto off, Cursor Grok 4.5 selected, and it is using Opus 5 High for subagents.</p> <p>Used 11% of my Other Models tokens in one prompt.</p> <p><strong>What’s happening?</strong><br /> - Cursor is using…