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What went wrong with my OpenAI custom internal chatbot when it started hallucinating answers from outdated company handbook files?

ChatGPTgpt-62 queries10/31/2026
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Fan-out diagram

The searches the AI actually ran for this prompt.

SEED QUERY
What went wrong with my OpenAI custom internal chatbot when it started hallucinating answers from outdated company handbook files?
2 real searches · 1 real-search pass
site:platform.openai.com/docs file search vector stores metadata filtering chunking retrieval OpenAIGoogle ↗
OBSERVED
site:help.openai.com custom GPT knowledge files update remove outdated files OpenAIGoogle ↗
OBSERVED

Badge and edge weight = share of passes that produced the query. Hover a query for its intent and routing format.

Query classes

Google's semantic query class for every sub-query: what kind of answer each search is after, simulated vs real.

Classifying 2 queries…

Searches and sources

ChatGPT2 real searches · gpt-6
site:platform.openai.com/docs file search vector stores metadata filtering chunking retrieval OpenAI Google ↗
site:help.openai.com custom GPT knowledge files update remove outdated files OpenAI Google ↗
  1. Creating and editing GPTs · help.openai.com
  2. Troubleshooting GPTs · help.openai.com
  3. Uploading files and audio to ChatGPT · help.openai.com

Queries

2 queries · click a column to sort
Query / typeSearchIntentQuery classRouting formatClusterFreq ↓Weight
site:platform.openai.com/docs file search vector stores metadata filtering chunking retrieval OpenAI
OBSERVED
Google ↗
AI Mode ↗
————1x
of 1
site:help.openai.com custom GPT knowledge files update remove outdated files OpenAI
OBSERVED
Google ↗
AI Mode ↗
————1x
of 1