Model Routers Can Break Context Cache in Multi-Turn Chats, Incurring Penalties
pvncher · x · 2026-07-24
The author points out a practical flaw with model routers: users frequently continue chats across multiple tasks within the same session.
If a new task is more complex and the router switches to a different model, it breaks the context cache. This incurs a huge penalty that can completely eat up the savings originally gained from using the router.
Related event: Switching Models Mid-Chat Breaks Context Cache(2 posts)→
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