GPT-5.5OpenAI
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LeanstralMistral AI
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Related Products
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About
GPT-5.5 is an advanced AI model designed to handle complex, real-world tasks with greater autonomy and efficiency. It quickly understands user intent and can execute multi-step workflows such as coding, research, data analysis, and document creation with minimal guidance. Instead of requiring step-by-step instructions, GPT-5.5 plans tasks, uses tools, evaluates outputs, and continues working until completion. It excels in knowledge work, software development, and analytical problem-solving, helping users move from idea to execution faster. The model is built to operate across tools and environments, making it highly effective for modern digital workflows. With strong reasoning and persistence, GPT-5.5 enables individuals and teams to complete demanding work more efficiently and accurately.
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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.
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Platforms Supported
Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook
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Platforms Supported
Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook
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Audience
GPT-5.5 is ideal for enterprises, developers, researchers, and business teams looking to automate complex workflows, enhance productivity, and scale operations using AI and workspace agents
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Audience
AI researchers, software engineers, and developers working with formal verification, proof assistants, and mathematically rigorous software development
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Support
Phone Support
24/7 Live Support
Online
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Support
Phone Support
24/7 Live Support
Online
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API
Offers API
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API
Offers API
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Screenshots and Videos |
Screenshots and Videos |
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Pricing
$5 per 1M tokens (input)
$5 per 1M input tokens and $30 per 1M output tokens, with a 1M context window
Free Version
Free Trial
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Pricing
Free
Open source
Free Version
Free Trial
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Reviews/
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Reviews/
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Pros & Cons from Real UsersPros
Cons
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Training
Documentation
Webinars
Live Online
In Person
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Training
Documentation
Webinars
Live Online
In Person
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Company InformationOpenAI
Founded: 2015
United States
openai.com
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Company InformationMistral AI
Founded: 2023
France
mistral.ai
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Categories |
Categories |
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Integrations
AWS GovCloud
AnyAPI
ChatGPT Agent
ChatGPT Pro
Claw Code
Factory Droid
GPT-5.1-Codex-Max
GPT-5.4 mini
GPT‑5.4‑Cyber
LaunchLemonade
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Integrations
AWS GovCloud
AnyAPI
ChatGPT Agent
ChatGPT Pro
Claw Code
Factory Droid
GPT-5.1-Codex-Max
GPT-5.4 mini
GPT‑5.4‑Cyber
LaunchLemonade
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