Prompt Octopus

Prompt Octopus helps developers compare outputs from different LLMs directly inside their codebase. It fits into your workflow via a VS Code extension, reducing the need for manual prompt testing in a browser.

Side-by-side model comparison

Select a prompt in the editor, choose the models you want, and view responses next to each other. Prompt Octopus supports 40+ models, including OpenAI, Anthropic, DeepSeek, Mistral, Grok, and others. This format makes it easier to pick the right model and refine prompt wording for a specific task.

Local keys and reusable setups

Prompt Octopus follows a “bring your own API keys” approach.

• API keys are stored locally and aren’t sent to a server
• Save prompts and model sets to quickly return to successful configurations
• Repeat experiments consistently without switching tools

LLM evals where you build

Designed for engineers integrating LLMs into products who need a clear way to evaluate response quality. Evaluations happen in the repo and editor, with fewer context switches and extra tabs.