Users report ChatGPT Pro context limit issues and 413 errors
kritinka2 · reddit · 2026-08-26
A ChatGPT Pro user reported encountering "Thinking failed" and HTTP 413 errors while using the chat for large-scale code review and planning, which typically indicates exceeding the max context length. The user noted that chats previously lasted nearly a month, but a new session hit the limit in just 3 days, suspecting a recent, unannounced change to context restrictions.
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