GPT-5.1 Pro

GPT-5.1 Pro

OpenAI
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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

Trinity Large Thinking is a frontier open source reasoning model developed by Arcee AI, designed specifically for complex, multi-step problem solving and autonomous agent workflows that require long-horizon planning and tool use. Built on a sparse Mixture-of-Experts architecture with roughly 400 billion total parameters but only about 13 billion active per token, the model achieves high efficiency while maintaining strong reasoning performance across tasks such as mathematical problem solving, code generation, and multi-step analysis. It introduces extended chain-of-thought reasoning capabilities, allowing the model to generate intermediate “thinking traces” before producing final answers, which improves accuracy and reliability in complex scenarios. Trinity Large Thinking supports a very large context window of up to 262K tokens, enabling it to process long documents, maintain state across extended interactions, and operate effectively in continuous agent loops.

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

Developers and enterprises building autonomous AI agents that need a high-performance, open-source reasoning model for complex, multi-step workflows

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

Free
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

Arcee AI
Founded: 2023
United States
www.arcee.ai/blog/trinity-large-thinking

Alternatives

Alternatives

Kimi K2 Thinking

Kimi K2 Thinking

Moonshot AI
Claude Opus 4.1

Claude Opus 4.1

Anthropic
Claude Opus 4.5

Claude Opus 4.5

Anthropic
GLM-5.1

GLM-5.1

Zhipu AI
GLM-4.5

GLM-4.5

Z.ai

Categories

Categories

Integrations

OpenRouter
Visual Studio Code
AiAssistWorks
C++
ChatGPT Enterprise
ChatGPT Plus
ChatGPT Pro
ChatGPT Search
Claude Opus 4.6
GitHub Copilot
Go
Microsoft Copilot Studio
Microsoft Foundry
Microsoft SharePoint
Microsoft Teams
OpenClaw
Rust
TypeScript
Verdent
Wazzap AI

Integrations

OpenRouter
Visual Studio Code
AiAssistWorks
C++
ChatGPT Enterprise
ChatGPT Plus
ChatGPT Pro
ChatGPT Search
Claude Opus 4.6
GitHub Copilot
Go
Microsoft Copilot Studio
Microsoft Foundry
Microsoft SharePoint
Microsoft Teams
OpenClaw
Rust
TypeScript
Verdent
Wazzap AI
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