📚 Glossary
Knowledge cutoff
In one line: The date after which the AI doesn't know about world events. ChatGPT, Claude and Gemini all have one — for current events use Perplexity.
The knowledge cutoff is the date after which an LLM has no knowledge of world events. Models are trained on a snapshot of the internet up to a particular date, then frozen. They don't learn new things after deployment.
Current cutoffs (Nov 2026):
- ChatGPT 4o: October 2023
- ChatGPT 4.1: May 2024
- Claude Sonnet 4: April 2024
- Gemini 2.5 Pro: early 2025
For anything recent, use Perplexity on AskAI.free — it browses the live web and answers with citations.
See it in action — ask any AI about knowledge cutoff on AskAI.free.
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