Claude Sonnet 5 burns 71% context window on first image query
IDisplayAgility · reddit · 2026-08-30
A user reported that inserting a screenshot into a long-standing Claude Sonnet 5 session (3+ months of context) and asking a simple question consumed 71% of the session's context limit. Subsequent questions only used 1-2%. This suggests a massive initial computational overhead when processing new images or reloading long contexts.
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