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Promptimal

API—OSS—FREE—DOCS2/5
PR5.1#28 of 30
—Web—Windows—MacoutLinux—Android—iOS

Ranked in AI Prompt Generators ·No free plan on record

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About

Promptimal is ranked #28 of 30 in AI prompt generators on Inferse. It runs on Linux.

Compared on AI prompt generators

Model support
singlegithub.com
Optimization mode
automatedgithub.com
Prompt testing
Yesgithub.com
Team collaboration
Nogithub.com
API access
Nogithub.com

Facts

What it does
Promptimal is a command-line tool that iteratively improves AI prompts using a genetic algorithm, without requiring a dataset.github.com · 9 Oct 2026
How to install
The README gives `pipx install promptimal` as the installation command.github.com · 9 Oct 2026
API requirement
The README says to add an OpenAI API key to the environment before using Promptimal.github.com · 9 Oct 2026
How to start
Users can launch Promptimal in a terminal and enter a prompt and an improvement description, or provide them as command-line arguments.github.com · 9 Oct 2026
Progress UI
The optimization process can be monitored in a UI opened in the terminal.github.com · 9 Oct 2026
Evaluation
By default, an LLM evaluates candidate prompts using a self-consistency approach.github.com · 9 Oct 2026
Custom evaluators
Users can supply a Python evaluator that accepts a prompt and returns a score between 0 and 1.github.com · 9 Oct 2026
Optimization controls
Command-line options control the number of iterations, candidate prompts per iteration, and score threshold for stopping.github.com · 9 Oct 2026
Default threshold
The README says the default stopping threshold is 1.0.github.com · 9 Oct 2026
Provider roadmap
The README lists support for other LLM providers, including Anthropic, Groq, and Ollama, as roadmap items.github.com · 9 Oct 2026
License
The GitHub repository identifies the project as MIT licensed.github.com · 9 Oct 2026
Current integrations
The README documents OpenAI API key configuration and does not describe other current provider integrations.github.com · 9 Oct 2026
Product
Promptimal is a command-line tool for improving AI prompts without needing a dataset.github.com · 9 Oct 2026
Optimization
It uses a genetic algorithm to iteratively refine a prompt based on a description of what the user wants to improve.github.com · 9 Oct 2026
Configuration
The number of iterations, candidate samples per iteration, and score threshold can be configured from the command line.github.com · 9 Oct 2026
OpenAI setup
The README instructs users to set an OpenAI API key in their environment before running Promptimal.github.com · 9 Oct 2026
Installation
The README gives `pipx install promptimal` as the installation command.github.com · 9 Oct 2026
Terminal interface
After starting an optimization, users can monitor its progress in a UI in their terminal.github.com · 9 Oct 2026
Roadmap
The roadmap lists support for other LLM providers, including Anthropic and Groq, and local models through Ollama, as planned work.github.com · 9 Oct 2026

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Where it ranks on Inferse

Sources