GPT-5.5 Pro

GPT-5.5 Pro

OpenAI
Leanstral

Leanstral

Mistral AI
+
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About

GPT-5.5 Pro is an advanced AI model designed to handle complex, real-world work with greater autonomy and efficiency. It understands user intent quickly and can execute multi-step tasks such as coding, research, data analysis, and document creation with minimal guidance. The model is built to plan, use tools, and refine its outputs until tasks are complete. It excels in knowledge work, software development, and analytical problem-solving. With strong reasoning and persistence, GPT-5.5 Pro can manage long-running workflows across tools and systems. It delivers high-quality results while maintaining speed and efficiency. Overall, it enables individuals and teams to complete demanding tasks faster and more accurately.

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
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Audience

GPT-5.5 Pro is ideal for enterprises, developers, researchers, and business teams looking to automate complex workflows, enhance productivity, and scale operations using AI and workspace agents

Audience

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

$30 per 1M tokens (input)
Free Version
Free Trial

Pricing

Free
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 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
Webinars
Live Online
In Person

Training

Documentation
Webinars
Live Online
In Person

Company Information

OpenAI
Founded: 2015
United States
openai.com

Company Information

Mistral AI
Founded: 2023
France
mistral.ai

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Claude Opus 4.7

Claude Opus 4.7

Anthropic
GPT-5.5

GPT-5.5

OpenAI

Categories

Categories

Integrations

ChatGPT
ChatGPT Atlas
ChatGPT Search
Codex Security
GPT-5.1-Codex-Max
Lorka
Lovable
Microsoft 365 Copilot
Microsoft 365 Copilot Chat
Microsoft Copilot Studio
Microsoft Excel
Microsoft Teams
Mistral AI Studio
OpenAI Codex
Perplexity Pro
Prism
SpawnHQ
TypeScript
Wazzap AI
Xcode

Integrations

ChatGPT
ChatGPT Atlas
ChatGPT Search
Codex Security
GPT-5.1-Codex-Max
Lorka
Lovable
Microsoft 365 Copilot
Microsoft 365 Copilot Chat
Microsoft Copilot Studio
Microsoft Excel
Microsoft Teams
Mistral AI Studio
OpenAI Codex
Perplexity Pro
Prism
SpawnHQ
TypeScript
Wazzap AI
Xcode
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