GPT-6.1 Sol is a reasoning model OpenAI launched at its September 2026 DevDay, delivering performance close to GPT-6 Astra at a much lower token cost. It is used for complex software engineering, agentic workflows, and analyzing large documents or codebases.
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GPT-6.1 Sol model is a reasoning-focused model OpenAI launched at its September 2026 DevDay, delivering intelligence close to the higher-end GPT-6 Astra at about one-fifth the input and output token cost.
It supports up to a 1,050,000-token context window and up to 128,000 tokens of output, with a default reasoning effort of medium plus low, high, xhigh, and max options, so cost and performance can be tuned to the task. It accepts text and image input and is used for code generation, debugging, repository analysis, document understanding, and other complex problem-solving in agentic workflows.
In BuildersgateGG's tool directory it is classified as an AI model used in ChatGPT, the API, and Codex for development and knowledge work that needs cost-efficient, high-performance reasoning.
It is a reasoning model OpenAI launched at its September 2026 DevDay, offering performance close to GPT-6 Astra at a much lower token cost.
It supports up to a 1,050,000-token context window and up to 128,000 tokens of output.
It is available to Plus, Pro, Business, Enterprise, and Edu users in ChatGPT Work and Codex, and developers can call gpt-6.1-sol through the OpenAI API.
Besides the default medium setting, low, high, xhigh, and max levels are available to balance cost and performance for the task at hand.