Prompt Octopus

Prompt Octopus provides side-by-side prompt evaluation across many models, enabling engineers to compare responses directly within their workflow. The tool emphasizes placing prompts and selecting models to assess how different systems respond to the same input, supporting developers who want to understand model behavior without leaving their environment.

Prompt Octopus operates by allowing users to highlight prompts, choose from multiple models, and compare the results in parallel. It supports entering and storing API keys locally, so keys are not sent to the service while users run comparisons, helping to keep credentials in a local context.

The platform offers features such as saving prompts and model preferences for reuse, and it allows users to bring their own API keys for unrestricted usage. It provides access to multiple models, including OpenAI, Anthropic, DeepSeek, Mistral, Grok, and others, to facilitate diverse evaluations.

The service targets developers who want to evaluate prompts and model outputs within their existing tooling. It presents an option to try the product free for the first set of comparisons, with premium options available for ongoing usage and additional capabilities.

Use cases

• Evaluate prompts across multiple models in a single workflow