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Claude Code users face token drain from silent subagent model shifts

Users running Claude Code on Fable or Opus 5 models may be experiencing unexpected token usage due to subagent model selection. A common configuration, using rank 3 of 4, has silently defaulted to a less efficient model in recent releases without error. A provided code snippet aims to correct this issue by ensuring the intended model is selected. AI

IMPACT Addresses a potential inefficiency in AI development workflows, helping users optimize token usage with Claude Code.

RANK_REASON This is a technical tip for users of a specific AI development tool, not a core AI release or significant industry event.

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Claude Code users face token drain from silent subagent model shifts

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  1. Mastodon — fosstodon.org TIER_1 English(EN) · [email protected] ·

    Running Claude Code on Fable or Opus 5 and wondering where your tokens go? It might be your subagents. Claude Code picks a subagent's model in this order: env v

    Running Claude Code on Fable or Opus 5 and wondering where your tokens go? It might be your subagents. Claude Code picks a subagent's model in this order: env var, explicit dispatch parameter, agent frontmatter, session model. The pin everybody uses is rank 3 of 4, and it has sil…