TokenScope

Track token usage and context window space in ChatGPT. Supports all models: GPT-4o, GPT-4.5, and more. TokenScope - ChatGPT Token Counter & Context Window Tracker

TokenScope is a lightweight Chrome extension that displays your current token usage and remaining context window directly inside the ChatGPT web UI.

Features:

• Live Token Counter: See how many tokens you've used and how many are left, right above the ChatGPT message input.
• Accurate Tokenization: Uses OpenAI's official tokenizer for precise token counting that exactly matches the ChatGPT API.
• Automatic Model Detection: Instantly detects which ChatGPT model you're using (including GPT-4o, GPT-4o with scheduled tasks, GPT-4.5, GPT-4o Mini, o3, o4-mini, and o4-mini-high) and adjusts the counter accordingly.
• Supports All Major Models: Works with all current ChatGPT models, including new variants as they're released.
• Visual Indicators: Color changes when approaching token limits to help you avoid hitting the maximum.
• Seamless Integration: Blends into the ChatGPT interface with a clean, user-friendly design.
• No Personal Data Collection: TokenScope does not collect or transmit any personal data.

Why install TokenScope?

• Avoid exceeding model limits and losing conversation history.
• Instantly know if your prompt or conversation is getting too long.
• Get exact token counts that match what OpenAI's API actually uses.
• Great for power users, researchers, and anyone who wants to get the most out of ChatGPT.