GPT-6.1 Sol

GPT-6.1 Sol

OpenAI
OpenAI Bel

OpenAI Bel

OpenAI
+
+

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About

GPT-6.1 Sol is an OpenAI model designed to deliver near-GPT-6 Astra intelligence at substantially lower cost across coding, professional work, computer use, scientific research, and agentic workflows. It improves on GPT-6 Sol across complex tasks such as software engineering, document analysis, multi-step business automation, and computer interaction. On DeepSWE v1.1, GPT-6.1 Sol matches GPT-6 Astra at roughly one-fifth of the cost while exceeding GPT-6 Sol's best score by 6.4 percentage points at a lower reasoning effort. The model also improves computer use, outperforming GPT-6 Sol by seven percentage points on the OSWorld 2.0 offline set at maximum reasoning effort while costing less than half as much per task. GPT-6.1 Sol provides improved factuality and alignment, including greater transparency about limitations and stronger adherence to user instructions during agentic tasks. It is available through ChatGPT Work, Codex, and the OpenAI API.

About

OpenAI Bel is the reported codename of an unreleased artificial intelligence foundation model associated with OpenAI. Unofficial reports describe it as a large-scale pretraining project intended to support future generations of AI models. The project has been linked in speculative reporting to OpenAI's Astra model family and potential successors to GPT-6. Some sources claim that Bel contains more than 10 trillion parameters, although this figure has not been independently verified. OpenAI has not published official technical specifications, benchmark results, or documentation confirming the project's capabilities. Bel is not currently available as a publicly documented model through ChatGPT or the OpenAI API.

Platforms Supported

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

Platforms Supported

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

Audience

Software developers, engineers, researchers, enterprises, AI application builders, professional knowledge workers, and agent developers that need advanced coding, reasoning, computer-use, scientific, document-analysis, and business-automation capabilities

Audience

AI researchers, machine learning engineers, software developers, enterprise AI teams, and organizations evaluating advanced language models

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 Supported

Screenshots and Videos

Screenshots and Videos

No images available

Pricing

$2 per 1M tokens (input)
Input: $2 per 1 million tokens
Output: $10 per 1 million tokens
Cached Input: $0.10 per 1 million cached input tokens
Free Version Not Supported
Free Trial Not Supported

Pricing

No information available.
Free Version Not Supported
Free Trial Not Supported

Reviews/Ratings

Overall 5.0 / 5
ease 5.0 / 5
features 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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Pros & Cons from Real Users

Pros

  • The biggest improvement for me is that it gets very close to Astra-level performance without Astra-level pricing. I can use it for serious coding, research, computer-use tasks, and long agent workflows without feeling like every run needs to be reserved for something mission-critical. The 1.05M-token context window is still a huge advantage. I can keep large repos, specs, logs, documentation, and a lot of prior agent work in context without constantly trimming things down. I also really like the new multi-agent support. Being able to let Sol delegate parts of a bigger task to subagents makes it much more useful for complicated projects where research, coding, testing, and analysis can happen in parallel.

Cons

  • The main downside is that Astra is still the model I would reach for when I absolutely want maximum capability and cost is secondary. Sol also no longer supports the none or minimal reasoning settings, so it is less suited to truly lightweight work than Luna.

Training

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

Training

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

Company Information

OpenAI
Founded: 2015
United States
openai.com

Company Information

OpenAI
Founded: 2015
United States
openai.com

Alternatives

Alternatives

GPT-6 Astra

GPT-6 Astra

OpenAI
GPT-6.1 Sol

GPT-6.1 Sol

OpenAI
GPT-6 Sol

GPT-6 Sol

OpenAI
GPT-6 Luna

GPT-6 Luna

OpenAI
GPT-6 Luna

GPT-6 Luna

OpenAI
GPT-6 Sol

GPT-6 Sol

OpenAI
Kimi K2.5

Kimi K2.5

Moonshot AI

Categories

AI Coding Models Supported
AI Models Supported
AI Vision Models Supported
Foundation Models Supported
Multimodal Models Supported

Categories

AI Coding Models Supported
AI Models Supported
AI Vision Models Supported
Foundation Models Supported
Multimodal Models Supported

Integrations

Anuma Supported
CSS Supported
ChatGPT Canvas Supported
ChatGPT Plus Supported
Codex CLI Supported
Dessix Supported
EaseMate AI Supported
GitHub Supported
JavaScript Supported
Kineto by JetBrains Supported
Kotlin Supported
Microsoft 365 Copilot Supported
Microsoft 365 Copilot Chat Supported
Microsoft Copilot Studio Supported
OpenRouter Supported
PowerShell Supported
Rust Supported
SQL Supported
SimpleClaw Supported
Transor Supported

Integrations

Anuma Supported
CSS Supported
ChatGPT Canvas Supported
ChatGPT Plus Supported
Codex CLI Supported
Dessix Supported
EaseMate AI Supported
GitHub Supported
JavaScript Supported
Kineto by JetBrains Supported
Kotlin Supported
Microsoft 365 Copilot Supported
Microsoft 365 Copilot Chat Supported
Microsoft Copilot Studio Supported
OpenRouter Supported
PowerShell Supported
Rust Supported
SQL Supported
SimpleClaw Supported
Transor Supported
Claim GPT-6.1 Sol and update features and information
Claim GPT-6.1 Sol and update features and information
Claim OpenAI Bel and update features and information
Claim OpenAI Bel and update features and information