Prompt Octopus is a tool that helps developers compare the responses of different large language models (LLMs) to the same prompt, with an emphasis on LLM evaluation within a codebase.
Purpose
- Find the most suitable model for a specific task.
- Quickly compare the outputs of multiple models during development to assist with prompt optimization and model selection.
Main capabilities
- Supports running OpenAI, Anthropic, DeepSeek, Mistral, Grok, and dozens of other models in parallel.
- Displays the responses of different models side by side for easy direct comparison.
- Allows users to save prompts and model preferences for reuse.
- Provides a VSCode extension that can be operated directly in the code editor.
- Supports bring your own API key (BYOK), with keys stored locally and invisible to the server, allowing free and unlimited use.
How to use
- Highlight the prompt and select the models you want to compare.
- Enter your own API key (optional), or use the official server (requires an upgrade).
- Run the comparison and view the model responses side by side.
- Save prompts and model settings for later use.
Use cases
- Developers need to evaluate how different models perform on tasks such as code generation and question answering.
- Teams integrate LLM evaluation into their development workflow to improve prompt quality.
- Individual developers quickly test multiple models without switching between multiple platforms.
Limitations and costs
- Free trial: the first 10 comparisons require no key or payment.
- Bring your own API key: free and unlimited use, with keys stored only locally.
- Using the official server: requires an upgrade, at a cost of $10 per month.
- The specific list of supported models and the detailed features of the VSCode extension are not fully listed in the materials; it is recommended to visit the official website for the latest information.
