What is the character limit for GPT-5.4, Claude and other Generative AI engines?

Current character limit is as follows.

• GPT-5.4 mini: 150,000 ch

• GPT-5.4 : 100,000 ch

• Claude 4.5 Sonnet: 70,000 ch 

• Gemini 3.0 Flash: 50,000 ch

*Character limit is based on source character count.