How to Split Large Texts for ChatGPT, Gemini, and Claude

Working with large documents in AI can be frustrating. You've probably seen the "Message too long" error more times than you'd like. Whether you're analyzing a 50-page PDF, a massive codebase, or a long transcript, splitting your text is essential.

Why Character Limits Exist

AI models like ChatGPT, Gemini, and Claude have "context windows." While these windows are growing (Gemini can now handle millions of tokens!), individual message inputs are still limited. This is often to ensure the AI remains focused and doesn't time out during processing.

The Strategy: Contextual Splitting

Simply cutting text at a specific character count isn't enough. You need to ensure the AI knows the parts are related. Here's a professional workflow:

• Part Numbering: Always label your parts (e.g., "[Part 1/5]").
• Acknowledgment Prompts: Tell the AI what you're doing. "I am sending a long text in 5 parts. Please just say 'Received' until all parts are sent."
• Logical Breaks: Try to split at paragraphs or sections rather than in the middle of a sentence.

Tools That Make It Easy

Manually splitting text is tedious and prone to errors. Using a dedicated tool like our Text Splitter ensures that you never go over the limit and that your parts are cleanly numbered for the AI to follow.