Prompt
Engineering
IDE
Forge better prompts for your
LLM-powered applications, agents,
and workflows.
Compose advanced prompts
Test prompt reliability
Optimize prompt performance
Collaborate with your team
Prompt
Supports 100+ LLMs
and 15 inference APIs
and 15 inference APIs
Compose
Advanced Prompts
Promptmetheus breaks prompts down into LEGO-like blocks for better composability, e.g. Context ⇢ Task ⇢ Instructions ⇢ Samples (shots) ⇢ Primer. You can play with different variations for each section and systematically fine-tune your prompts for minimal cost and maximum performance.
Test
Prompt Reliability
The Prompt IDE includes a range of tools to evaluate your prompts under various conditions. For instance, Datasets enable rapid iteration with different inputs, while completion Ratings and the respective visual statistics help gauge output quality.
Optimize
Prompt Performance
End-to-end performance and reliability of prompt chains (agents) depend heavily on the accuracy of each prompt in the sequence. Errors can compound and compromise the final output. Promptmetheus can help you optimize each prompt in the chain to consistently generate great completions.
Traceability
Track and reconstruct the complete prompt design process.
Evaluators
Define evaluators and automatically validate completions.
Cost Estimation
Estimate inference costs for different configurations and scenarios.
Data Export
Export prompts and completions in .txt, .csv, .xlsx, or .json format.
Analytics
Analyze prompt performance with statistics, charts, and insights.
Models
We support all the latest LLMs and APIs
Claude 4.1 Opus
Claude 4 Opus
Claude 4 Sonnet
Claude 3.7 Sonnet
Claude 3.5 Sonnet
Claude 3.5 Haiku
Claude 3 Opus
Claude 3 Sonnet
Claude 3 Haiku
Gemini 2.5 Pro
Gemini 2.5 Flash
Gemini 2.0 Flash Light
Gemini 2.0 Flash
Gemini 1.5 Pro
Gemini 1.5 Flash
o4 mini
o3
o3 pro
o3 mini
o1
o1 pro
o1 mini
GPT-5
GPT-5 mini
GPT-5 nano
GPT-4.5
GPT-4.1
GPT-4.1 mini
GPT-4.1 nano
GPT-4o
GPT-4o mini
GPT-4
GPT-4 Turbo
GPT-3.5 Turbo
Magistral Medium
Magistral Small
Mistral Large 2.1
Mistral Medium 3
Mistral Small 3.2
Mistral Nemo
Ministral 8b
Ministral 3b
Compound Beta
Compound Beta Mini
OpenAI GPT-OSS 120B
OpenAI GPT-OSS 20B
Moonshot AI Kimi K2
DeepSeek R1 Distill Llama 70B
DeepSeek R1 Distill Qwen 32B
Alibaba Qwen 3 32B
Meta Llama 4 Maverick 17B 128e
Meta Llama 4 Scout 17B 16e
Meta Llama 3.3
Meta Llama 3.1
Mistral Saba 24B
Google Gemma 2
OpenAI GPT-OSS 120B
OpenAI GPT-OSS 20B
Moonshot AI Kimi K2
DeepSeek Chat 3.1
DeepSeek R1
DeepSeek V3
Alibaba Qwen 2.5
Alibaba Qwen 2
Meta Llama 4 Maverick 17B 128e
Meta Llama 4 Scout 17B 16e
Meta Llama 3.3
Meta Llama 3.2
Meta Llama 3.1
Google Gemma 3
Microsoft WizardLM
Microsoft Phi 4
DeepSeek Chat 3.1
OpenAI GPT-OSS 120B
OpenAI GPT-OSS 20B
Moonshot AI Kimi K2
Tencent Hunyuan A13B
Baidu Ernie 4.5 300B A47B
“The hottest new programming language is English.”
— Andrej Karpathy
Pricing
Great plans for individuals and teams
Playground
FREE
- Forge
- 1 user
- Local data storage
- OpenAI models only
- Stats & Insights
- Data import / export
- Community support
Single
$29
/
month
7-day free trial
- Prompt IDE
- 1 user
- Cloud sync between devices
- 12 providers and 100+ models
- Multiple projects
- Automatic evaluators
- Prompt history and full traceability
- Stats & Insights
- Data export
- Dedicated support
Team
Starting at
$99
/
month
- Prompt IDE
- 3 users included
- $19/month per additional user
- All Single features, plus
- User management
- Shared workspace with real-time collaboration
- Business support
You can cancel subscriptions any time.
Subscriptions do not include budget for inference, you need to provide your own API keys.
For Enterprise plans and special requests, please get in touch.
What is Prompt Engineering?
What is a Prompt IDE?
How is Promptmetheus different from the OpenAI and other playgrounds?
How is Promptmetheus different from other prompt engineering tools?
Is there an API or SDK?
Can I use Promptmetheus together with LangChain, LangFlow, and other AI agent builders?
What is the difference between Forge and Archery?
What is an AIPI?
Does Promptmetheus integrate with automation tools like Make, Zapier, IFTTT, and n8n?