Leanstral

Leanstral

Mistral AI
+
+

Related Products

  • TrustInSoft Analyzer
    6 Ratings
    Visit Website
  • Google AI Studio
    30 Ratings
    Visit Website
  • JetBrains Junie
    12 Ratings
    Visit Website
  • Retool
    593 Ratings
    Visit Website
  • Gemini Enterprise Agent Platform
    999 Ratings
    Visit Website
  • BAND
    3 Ratings
    Visit Website
  • wp2print
    7,598 Ratings
    Visit Website
  • Detrack
    148 Ratings
    Visit Website
  • LTX
    182 Ratings
    Visit Website
  • BrandMail
    327 Ratings
    Visit Website

About

Leanstral is an open-source code agent developed by Mistral AI specifically designed to work with the Lean 4 proof assistant. The model focuses on generating code while also formally verifying its correctness against strict mathematical or software specifications. Unlike traditional coding assistants, Leanstral integrates directly with formal proof systems to ensure that generated code satisfies defined logical requirements. Its architecture is optimized for proof engineering tasks and operates efficiently with sparse model parameters. Leanstral is released under the Apache 2.0 license, making it freely accessible for developers, researchers, and organizations to use and customize. The model is designed to operate within real-world formal repositories rather than isolated problem environments. By combining code generation with formal verification, Leanstral aims to reduce the need for manual human review in complex software and mathematical development.

About

Codex is an AI-powered coding agent from OpenAI designed to help developers build, manage, and ship software more efficiently across the entire development lifecycle. It acts as an intelligent pair programmer that can understand codebases, generate features, and deliver production-ready pull requests. Codex can safely execute commands in sandboxed environments while assisting with debugging, refactoring, and testing. A key advancement is its computer use capability, allowing it to operate your computer by seeing, clicking, and typing across applications. This enables Codex to interact with tools that don’t have APIs, making it useful for tasks like frontend testing and app navigation. The platform also includes an in-app browser and integrations with various developer tools for a more unified workflow. Codex supports automation by handling ongoing tasks such as monitoring, issue triage, and follow-ups.

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Audience

AI researchers, software engineers, and developers working with formal verification, proof assistants, and mathematically rigorous software development

Audience

Codex is ideal for software developers, engineering teams, and tech organizations that want to automate coding tasks, leverage AI-driven workflows, and utilize computer-based automation to accelerate software development

Support

Phone Support
24/7 Live Support
Online

Support

Phone Support
24/7 Live Support
Online

API

Offers API

API

Offers API

Screenshots and Videos

Screenshots and Videos

Pricing

Free
Open source
Free Version
Free Trial

Pricing

$20/month
Free Version
Free Trial

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 5.0 / 5
ease 5.0 / 5
features 5.0 / 5
design 5.0 / 5
support 5.0 / 5

Pros & Cons from Real Users

Pros

  • OpenAI Codex feels less like a coding assistant and more like a junior developer that can execute tasks independently. For knowledge workers juggling technical and non technical work, this shift is powerful because it can take a task, work through it, and return with usable results. Its ability to operate across full codebases is a major strength, allowing it to write, debug, test, and manage multiple files in a way that fits real world development workflows. The multi agent and automation capabilities are particularly useful since you can run parallel tasks and orchestrate work efficiently, which significantly improves productivity on complex projects. It is also expanding beyond pure coding with features that allow interaction with software environments, making it feel like a broader work assistant.

Cons

  • Codex can still struggle with very large or highly complex projects without iteration, and outputs often need refinement through multiple passes. The setup and workflow can feel heavier compared to simpler tools, especially when integrating with repositories or managing environments. There is also strong competition, and in some advanced or highly structured coding scenarios other tools may feel more precise.

Training

Documentation
Webinars
Live Online
In Person

Training

Documentation
Webinars
Live Online
In Person

Company Information

Mistral AI
Founded: 2023
France
mistral.ai

Company Information

OpenAI
Founded: 2015
United States
openai.com

Alternatives

GPT-5.5

GPT-5.5

OpenAI

Alternatives

Perplexity Computer

Perplexity Computer

Perplexity AI
Claude Opus 4.6

Claude Opus 4.6

Anthropic
Bolt.new

Bolt.new

StackBlitz
Leanstral 1.5

Leanstral 1.5

Mistral AI
Codex CLI

Codex CLI

OpenAI
Claude Code

Claude Code

Anthropic

Categories

Categories

Integrations

AionUi
Conductor
Cosyra
Entire
GPT-5
GPT-5.1 Pro
GPT-5.2
GPT-5.2 Thinking
GPT-5.3-Codex
Genome Computer
Google Calendar
Graphify
Kimi K2.7 Code
Kimi K3
Laguna M.1
MemPalace
Muse Spark 1.2
Nimbalyst
OpenSpec
bb

Integrations

AionUi
Conductor
Cosyra
Entire
GPT-5
GPT-5.1 Pro
GPT-5.2
GPT-5.2 Thinking
GPT-5.3-Codex
Genome Computer
Google Calendar
Graphify
Kimi K2.7 Code
Kimi K3
Laguna M.1
MemPalace
Muse Spark 1.2
Nimbalyst
OpenSpec
bb
Claim Leanstral and update features and information
Claim Leanstral and update features and information
Claim OpenAI Codex and update features and information
Claim OpenAI Codex and update features and information