GPT-6.1 Sol: OpenAI’s New AI Model for Coding, Professional Work and AI Agents


GPT-6.1 Sol is OpenAI’s latest model in the GPT-6 family, introduced on September 29, 2026. OpenAI describes GPT-6.1 Sol as a model designed to deliver near-GPT-6 Astra performance at a lower cost, particularly for complex coding, computer-use tasks, document-heavy work, and professional workflows.


For developers and businesses looking for powerful AI without the higher cost of OpenAI’s flagship Astra model, GPT-6.1 Sol is positioned as an important new option.


What Is GPT-6.1 Sol?


GPT-6.1 Sol is an upgraded version of GPT-6 Sol. OpenAI says it is optimized for tasks where advanced reasoning, coding ability, tool use, and cost efficiency are important.


The model is especially aimed at:


- Complex programming and debugging

- AI-assisted software development

- Computer-use workflows

- Understanding large documents

- Multi-step professional tasks

- Business automation

- Agentic workflows

- Research and analysis

- Structured outputs and tool calling


OpenAI's official model documentation describes GPT-6.1 Sol as offering near-Astra performance for complex work at a lower cost.


GPT-6.1 Sol vs GPT-6 Astra


One of the biggest reasons GPT-6.1 Sol is attracting attention is its relationship with GPT-6 Astra.


OpenAI positions GPT-6 Astra as its most capable model for the most demanding work, while GPT-6.1 Sol is designed to provide similar levels of performance across many coding, computer-use, and professional tasks at substantially lower standard API pricing.


Feature| GPT-6.1 Sol| GPT-6 Astra

Positioning| Near-Astra performance at lower cost| OpenAI's most capable model

Context window| 1.05 million tokens| 1.05 million tokens

Maximum output| 128,000 tokens| 128,000 tokens

Input price| $2 / 1M tokens| $10 / 1M tokens

Output price| $10 / 1M tokens| $50 / 1M tokens

Coding| Advanced| Advanced

Computer use| Supported| Supported

Web search| Supported| Supported

File search| Supported| Supported

Code interpreter| Supported| Supported

Function calling| Supported| Supported


The published prices above are OpenAI's standard API rates for requests within the applicable input threshold.


GPT-6.1 Sol Pricing


For developers using the OpenAI API, GPT-6.1 Sol has a standard price of:


- $2 per 1 million input tokens

- $0.10 per 1 million cached input tokens

- $2.50 per 1 million cache-write tokens

- $10 per 1 million output tokens


OpenAI also states that requests with more than 272K input tokens have different pricing, while Fast processing costs more and Batch/Flex processing can reduce standard costs.


This pricing structure makes GPT-6.1 Sol particularly relevant for companies building AI applications that need to process large volumes of information.


1 Million Token Context Window


Another major feature of GPT-6.1 Sol is its very large context window.


OpenAI lists a 1,050,000-token context window and a maximum output of 128,000 tokens.


A large context window can be useful when an AI system needs to work with:


- Large codebases

- Long technical documents

- Multiple files

- Business reports

- Extensive project instructions

- Large collections of information


Instead of repeatedly dividing large projects into smaller pieces, developers can provide substantially more context within a single request.


GPT-6.1 Sol for Coding


Coding is one of the main areas targeted by GPT-6.1 Sol.


OpenAI specifically lists complex coding among the model's core use cases. The model supports function calling, structured outputs, code interpreter, hosted shell, computer use, and other tools through the Responses API.


This means developers can use GPT-6.1 Sol for workflows such as:


1. Understanding an existing codebase

2. Finding bugs

3. Planning a solution

4. Writing or modifying code

5. Running tools

6. Reviewing the result

7. Iterating on the implementation


This makes the model suitable for more than simple code generation.


Computer Use and AI Agents


GPT-6.1 Sol also supports computer use, allowing applications built around the model to perform more complex workflows involving software and computer interfaces.


OpenAI's API documentation lists computer use, hosted shell, web search, file search, code interpreter, MCP, skills, and tool search among supported capabilities.


This is particularly important for the development of AI agents.


Instead of simply answering a question, an AI agent can potentially:


Understand → Plan → Use tools → Perform actions → Check results → Continue the workflow


That approach is becoming increasingly important for business automation and professional AI software.


GPT-6.1 Sol for Professional Work


GPT-6.1 Sol isn't designed only for programmers.


OpenAI also positions it for professional work involving documents, analysis, computer use, and multi-step workflows.


Potential applications include:


- Business document analysis

- Research

- Report generation

- Data processing

- Software development

- Technical documentation

- Workflow automation

- Internal business tools

- AI-powered customer applications


The model's large context window can also be useful for organizations that need to process large amounts of information.


Reasoning Controls


GPT-6.1 Sol provides several reasoning-effort options.


OpenAI lists:


- Low

- Medium

- High

- XHigh

- Max


with Medium as the default.


This gives developers more control over the balance between reasoning depth, speed, and resource usage.


For a simple task, lower reasoning may be sufficient. More complicated programming or professional workflows can use higher reasoning settings when additional analysis is useful.


GPT-6.1 Sol and the OpenAI API


Developers can select the model using the API model identifier:


"gpt-6.1-sol"


OpenAI recommends the Responses API for tool calling, while Chat Completions is also supported without tool calling.


The model supports features including:


- Streaming

- Function calling

- Structured outputs

- Image input

- Web search

- File search

- Image generation

- Code interpreter

- Hosted shell

- Computer use

- MCP

- Tool search


These capabilities make GPT-6.1 Sol suitable for applications that need more than traditional chatbot responses.


GPT-6.1 Sol vs GPT-6 Sol


GPT-6.1 Sol is the newer model compared with GPT-6 Sol.


OpenAI describes GPT-6.1 Sol as an upgrade intended to deliver near-Astra performance for complex coding, computer use, and professional work while maintaining a lower cost profile.


For developers already using GPT-6 Sol, GPT-6.1 Sol is therefore worth testing on their actual workloads rather than assuming that every task will benefit equally.


Is GPT-6.1 Sol Available in ChatGPT?


Availability depends on the ChatGPT product and account/workspace.


OpenAI currently documents GPT-6.1 Sol as available in ChatGPT Work and Codex, as well as through the OpenAI API. Access can depend on the plan and workspace permissions.


This is important because the availability of a model in the API does not necessarily mean that every ChatGPT user will see it as a selectable model.


GPT-6.1 Sol: Key Specifications


Here are the main specifications currently published by OpenAI:


Model: GPT-6.1 Sol

API ID: "gpt-6.1-sol"

Launch date: September 29, 2026

Context window: 1,050,000 tokens

Maximum output: 128,000 tokens

Input price: $2 per 1M tokens

Output price: $10 per 1M tokens

Reasoning: Low, Medium, High, XHigh and Max

Image input: Supported

Audio input: Not supported

Video input: Not supported

Web search: Supported

Computer use: Supported

Code interpreter: Supported

Function calling: Supported

Structured outputs: Supported


These specifications are based on OpenAI's current model documentation and can change as the product evolves.


Frequently Asked Questions About GPT-6.1 Sol


What is GPT-6.1 Sol?


GPT-6.1 Sol is an OpenAI GPT-6-series AI model designed for complex coding, computer use, professional work, and multi-step AI workflows.


Is GPT-6.1 Sol better than GPT-6 Sol?


GPT-6.1 Sol is the newer model and is positioned by OpenAI as an upgrade over GPT-6 Sol, particularly for complex professional and agentic workloads. Actual performance can vary depending on the task.


Is GPT-6.1 Sol cheaper than GPT-6 Astra?


Yes. OpenAI's published standard API pricing is $2 per million input tokens and $10 per million output tokens for GPT-6.1 Sol, compared with $10 and $50 respectively for GPT-6 Astra.


How much context does GPT-6.1 Sol support?


GPT-6.1 Sol supports a context window of approximately 1.05 million tokens.


Can GPT-6.1 Sol write code?


Yes. Complex coding and software-development workflows are among its primary use cases.


Can GPT-6.1 Sol use tools?


Yes. OpenAI lists capabilities such as web search, file search, code interpreter, computer use, hosted shell, MCP, and tool search.


What is the GPT-6.1 Sol API name?


The API model identifier is "gpt-6.1-sol".


Final Thoughts


GPT-6.1 Sol represents OpenAI's effort to bring high-end AI capabilities to developers and professional workflows at a significantly lower standard API cost than its flagship GPT-6 Astra model.


Its combination of a 1.05-million-token context window, advanced reasoning controls, coding capabilities, computer use, tool support, and lower API pricing makes it a significant model for AI developers and businesses building complex applications.


For everyday users, the most important distinction is availability: GPT-6.1 Sol is currently positioned primarily around ChatGPT Work, Codex, and API-based development, rather than being universally available as a standard ChatGPT model.


As OpenAI continues expanding its GPT-6 family, GPT-6.1 Sol provides another option for developers who need substantial reasoning and agentic capabilities while keeping operating costs under control.


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