Limitation on length of question/prompt text in Generative Answer node

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Posted on by SK-16120843-0

I noticed that create generative answer node does not return any result when length of question/prompt is long (e.g. 2 or more long sentences). If I shorted the prompt it seems to work. I am using Copilot studio Capacity license. Has any one else also faced a similar issue?

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Nivedipa-MSFT Microsoft Employee on at

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Generative Answer nodes in Copilot Studio can fail with very long prompts because this capability might be subject to usage limits or capacity throttling. To avoid issues, keep prompts concise and focused, or split them into smaller queries.

Ref doc: FAQ for Generative Answers – Copilot Studio

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Romain The Low-Code... 2,800 Super User 2026 Season 1 on at

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Copilot studio is different from public GPT on this point, you have buffer size limit in :

Index returned result

Question

Prompt

Answer.

It's a technical limitation, those limit are bigger every day :) just at the moment we need to wait for MS to make them larger :)

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