Usage4Claude VS https://open-gpt.app/

• Real-time token tracking
  Usage4Claude provides real-time monitoring of token usage directly within the Claude interface, allowing users to keep track of their consumption without needing to check external dashboards or billing pages.
• Lightweight browser extension
  It operates as a simple browser extension (userscript) that is easy to install and doesn't require complex setup or additional software, making it accessible to a wide range of users.
• Cost awareness
  By displaying token usage information, it helps users become more aware of their API or subscription consumption, enabling better budget management and preventing unexpected overages.
• Open source
  The project is open source and hosted on GitHub, meaning users can inspect the code for security, contribute improvements, and customize it to their specific needs.
• Non-intrusive integration
  The tool integrates directly into the Claude web interface without significantly altering the user experience, providing useful data in a convenient overlay or display without disrupting normal workflow.

Possible disadvantages

• Dependency on UI structure
  As a userscript that relies on the Claude web interface's DOM structure, it can break whenever Anthropic updates or redesigns the Claude UI, requiring frequent maintenance and updates.
• Limited official support
  Being a third-party community project, it has no official backing from Anthropic, meaning there are no guarantees of long-term maintenance, compatibility, or accuracy of the usage data displayed.
• Potential accuracy concerns
  Token counting done client-side or through estimation may not perfectly match Anthropic's actual billing calculations, potentially giving users a false sense of their true usage levels.
• Small community and documentation
  As a relatively niche project, it may have limited documentation, fewer contributors, and a smaller user base, which can make troubleshooting issues more difficult.
• Security considerations
  Installing third-party userscripts that interact with web applications like Claude requires trusting the developer, as the script has access to page content and potentially sensitive conversation data.

• Accessible AI Chat Interface
  Provides a user-friendly web-based interface for interacting with GPT-based AI models without needing to set up API access or coding knowledge.
• No Installation Required
  Being a web application, it can be used directly from a browser without downloading or installing any software.
• Potentially Free or Low-Cost Access
  Many GPT wrapper sites like this offer free tiers or lower-cost access compared to official API pricing, making AI chat more accessible to casual users.
• Quick Setup
  Users can typically start chatting almost immediately after visiting the site, with minimal account creation or configuration steps.
• Cross-Platform Compatibility
  Since it runs in a browser, it can be accessed from various devices including desktops, tablets, and smartphones without platform-specific versions.

Possible disadvantages

• Uncertain Reliability
  Third-party GPT wrapper websites often depend on underlying API access that can be unstable, rate-limited, or discontinued without notice, affecting consistent availability.
• Data Privacy Concerns
  Using an unofficial third-party service to process conversations raises questions about how user data and conversation history are stored, used, or shared.
• Limited Transparency
  It may be unclear which underlying AI model version is being used, how up-to-date it is, or what modifications have been made to the base model's behavior.
• Potential Hidden Costs or Ads
  Free-to-use AI wrapper sites often monetize through ads, premium upsells, or data collection, which may not be clearly disclosed to users upfront.
• Lack of Official Support
  Unlike official AI platforms, unofficial wrapper sites may lack dedicated customer support, regular updates, or accountability if issues arise.

• Show HN: macOS menu bar gauges for your Claude Code quota

  Lol how many of these things are there. I've been using https://github.com/f-is-h/usage4claude which includes Codex usage (I use Claude and Codex). - Source: Hacker News / 4 months ago

Tracking https://open-gpt.app/ since Jul 2023.