Laguna XS.2

Laguna XS.2

Poolside
Leanstral

Leanstral

Mistral AI
+
+

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About

Laguna XS.2 is Poolside’s open-weight agentic coding model, built as the lightest and fastest model in the Laguna family. It is a 33B total-parameter Mixture of Experts model with 3B activated parameters, trained completely in-house on 30T tokens. As Poolside’s newest generation model open to the community, Laguna XS.2 is a second-generation architecture and the company’s first open-weight model, built on the lessons learned from training Laguna M.1 across synthetic data and reinforcement learning. The model is designed for agentic coding workflows, where it can code, act, iterate quickly, and perform best inside Poolside’s coding agent. Laguna XS.2 is positioned as a strong model for rapid agentic iteration, especially for developers and teams that need a compact, efficient coding model rather than a heavier frontier system. It is released under an Apache 2.0 license, allowing the community to evaluate, fine-tune, quantize, serve, and build on the weights.

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.

Platforms Supported

Windows Supported
Mac Supported
Linux Supported
Cloud Not Supported
On-Premises Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Supported
Mac Supported
Linux Supported
Cloud Not Supported
On-Premises Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

AI developers and engineering teams that need efficient AI models for agentic coding, long-horizon software development, and rapid coding iterations

Audience

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

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Not Supported

API

Offers API Supported

API

Offers API Not Supported

Screenshots and Videos

Screenshots and Videos

Pricing

Free
Free Version Supported
Free Trial Not Supported

Pricing

Free
Open source
Free Version Supported
Free Trial Not Supported

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 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

Training

Documentation Supported
Webinars Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

Poolside
Founded: 2023
United States
www.poolside.ai/models

Company Information

Mistral AI
Founded: 2023
France
mistral.ai

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MiMo-V2.6-Pro

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Poolside

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Leanstral 1.5

Leanstral 1.5

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Categories

AI Coding Models Supported
AI Models Supported

Categories

AI Coding Agents Supported
AI Coding Models Supported
AI Models Supported

Integrations

Agent Client Protocol (ACP) Supported
Cline Supported
Hermes Agent Supported
Hugging Face Supported
IntelliJ IDEA Supported
Kilo Code Supported
Mistral AI Not Supported
Mistral AI Studio Not Supported
Mistral Vibe Not Supported
Nous Portal Supported
Ollama Supported
OpenAI Codex Supported
OpenClaw Supported
OpenCode Supported
OpenRouter Supported
Poolside Supported
Roo Code Supported
Visual Studio Supported
Visual Studio Code Supported
Zed Supported

Integrations

Agent Client Protocol (ACP) Not Supported
Cline Not Supported
Hermes Agent Not Supported
Hugging Face Not Supported
IntelliJ IDEA Not Supported
Kilo Code Not Supported
Mistral AI Supported
Mistral AI Studio Supported
Mistral Vibe Supported
Nous Portal Not Supported
Ollama Not Supported
OpenAI Codex Not Supported
OpenClaw Not Supported
OpenCode Not Supported
OpenRouter Not Supported
Poolside Not Supported
Roo Code Not Supported
Visual Studio Not Supported
Visual Studio Code Not Supported
Zed Not Supported
Claim Laguna XS.2 and update features and information
Claim Laguna XS.2 and update features and information
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