Forge Reliable Prompts
for Large Language Models

A cross-platform Prompt Engineering IDE that helps you augment your apps and workflows with the mighty capabilities of cutting-edge AI.

Looking for the FORGE playground? This way, please

One prompt, all LLMs

PROMPTMETHEUS concept meme

“The hottest new programming language is English.” – Andrej Karpathy


Augment apps and
services with AI

LLMs can completely personalize your apps and make them smarter, but integration can be challenging. With PROMPTMETHEUS, your app simply connects to AIPI endpoints and the prompt engineering, prompt testing, prompt optimization, and model selection can be done conveniently in the platform.

AI integrations

PROMPTMETHEUS provides the complete toolchain to build and deploy AI integrations. Simply compose and test a reliable prompt for the task at hand, select a suitable LLM, and publish a dedicated AIPI endpoint. Voilà, third-party services like Notion, Zapier, Airtable, etc. can now interact with your prompt.

Automate workflows
with AI

With the rapidly evolving capabilities of large language models, tasks of ever higher complexity can be fully automated. If your processes and workflows involve any repetitive text-based tasks, chances are PROMPTMETHEUS can help you automate them to save time and money.


Compose prompts

Assemble prompts like lego bricks with text and data blocks.

Estimate cost

Assess how much you will pay for a prompt before you execute it.

Evaluate outputs

Rate outputs to measure prompt performance.

Stats & Insights

Prompt performance stats, charts, and key metrics at a glance.

Full traceability

Complete history of the the entire prompt design process.

Export data

Download prompt completions in CSV, XLSX, and JSON format.

Prompt endpoints

Deploy prompts to AIPI endpoints and UI interfaces.

Coming soon

Vector embeddings

Add context to your prompts via vector stores and -search.

Coming soon

“No matter what problem you encounter, whether it's a grand challenge for humanity or a personal problem of your own, there's an idea out there that can overcome it. And you can find that idea.” – Ray Kurzweil



  • Prompting IDE
  • Local data storage
  • OpenAI GPT-3/4 models
  • Stats & Insights
  • Data import/export


$29 / month
7-day free trial
  • Same as Playground, plus
  • Cloud sync
  • All providers and models
  • Projects
  • History and full traceability
  • Standard support


$79 / month
7-day free trial
  • Same as Standard, plus
  • Deploy prompts to AIPI endpoints
  • AIPI versioning and monitoring
  • Premium support


starting at
$590 / month
  • All PRO features, plus
  • Shared projects
  • Real-time collaboration
  • Onboarding
  • Enterprise support

You can cancel subscriptions any time.

Subscriptions do not include fees for API usage of LLM service providers, you need to provide your own API keys.

Special pricing is available for small teams, startups, and students.


What is Prompt Engineering?

What is a Prompt IDE?

How is PROMPTMETHEUS different from the OpenAI playground?

How is PROMPTMETHEUS different from other prompt engineering tools?

What can I build with PROMPTMETHEUS?

What is an AIPI?

Does PROMPTMETHEUS integrate with other services?


If you have any other questions about PROMPTMETHEUS, please don't hesitate to ask. The goal is to provide a completely frictionless user experience.

Get in touch!

Leave a review to help your peers
Trustpilot logoG2 logoSaaSHub logo

Supported LLMs


Claude 2

Claude Instant 1.2

Claude Instant 1


Command Nightly


Command Light


GPT-4 / 32k

GPT-3.5 Turbo / 16k

GPT-3.5 Turbo Instruct

DaVinci 003

Curie 001

Babbage 001

Ada 001

PaLM 2

Text Bison

Chat Bison

Code Bison

NLP Cloud

Chat Dolphin


AI21 Labs

Jurassic 2 Ultra

Jurassic 2 Mid

Jurassic 2 Light

Aleph Alpha

Luminous Supreme

Luminous Supreme Control

Luminous Extended

Luminous Extended Control

Luminous Base

Luminous Base Control