GPT-5.1 Pro

GPT-5.1 Pro

OpenAI
Phase Change

Phase Change

Phase Change Software
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+

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About

GPT-5.1 Pro is the highest-performance version of the GPT-5.1 model family, designed for research-grade reasoning and advanced analytical workloads. It delivers deeper, more structured thinking, making it ideal for complex problem-solving across coding, science, finance, law, and technical research. Unlike the Instant and Thinking versions, GPT-5.1 Pro is built to maintain accuracy under heavy cognitive load, producing clearer logic and more reliable multi-step reasoning. Pro users also gain access to extended context windows, allowing significantly longer inputs and deeper information processing. While it supports the full range of ChatGPT features, GPT-5.1 Pro is optimized for precision, rigor, and high-stakes tasks. It is available exclusively to ChatGPT Pro and Business customers.

About

Our proprietary AI reasoning engine precisely navigates through and analyzes the intricacies of the millions of lines of code within your applications. Developers can instantly pinpoint their desired code. You need to understand every business process, piece of data, or decision point embedded in your code before you can confidently manage, change, or integrate the COBOL applications at the core of the enterprise. Colleague transforms your code into a valuable knowledge base with our logic-based reasoning engine. Unlike generative AI, our technology is precise and explainable. Explore and compare different scenarios by changing conditions in real-time without getting lost.

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-5.1 Pro is ideal for researchers, technical professionals, and advanced users who require ChatGPT’s strongest reasoning capabilities for high-precision, high-complexity work

Audience

Businesses in need of a cognitive platform that helps improve software development productivity and accuracy

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

No images available

Screenshots and Videos

Pricing

No information available.
Free Version
Free Trial

Pricing

No information available.
Free Version
Free Trial

Reviews/Ratings

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

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:

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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

Phase Change Software
Founded: 2005
United States
phasechange.ai

Alternatives

Alternatives

COBOL Colleague

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Rocket COBOL Analyzer

Rocket COBOL Analyzer

Rocket Software
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Claude Opus 4.1

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Rocket COBOL

Rocket COBOL

Rocket Software

Categories

Categories

Integrations

AiAssistWorks
Augment Code
ChatGPT
ChatGPT Pro
Codex Security
GPT-5.1-Codex-Max
JavaScript
JetBrains Junie
Kotlin
Microsoft Foundry Models
Node.js
Novelcrafter
OpenCode
OpenRouter
React
Rust
Transor
TypeScript
Wazzap AI

Integrations

AiAssistWorks
Augment Code
ChatGPT
ChatGPT Pro
Codex Security
GPT-5.1-Codex-Max
JavaScript
JetBrains Junie
Kotlin
Microsoft Foundry Models
Node.js
Novelcrafter
OpenCode
OpenRouter
React
Rust
Transor
TypeScript
Wazzap AI
Claim GPT-5.1 Pro and update features and information
Claim GPT-5.1 Pro and update features and information
Claim Phase Change and update features and information
Claim Phase Change and update features and information