OpenAI launches GPT-6.1 Sol, claiming near-Astra performance at one-fifth of Astra’s standard API token prices

OpenAI has introduced GPT-6.1 Sol as an upgrade to GPT-6 Sol.

OpenAI says the new model delivers substantial improvements over GPT-6 Sol across complex professional tasks, including writing and debugging code, understanding documents, and executing multi-step business workflows. The company also says GPT-6.1 Sol is a significant upgrade across coding, computer use, and complex professional work, while approaching GPT-6 Astra on several benchmarks at substantially lower cost, based on OpenAI’s own reported evaluations.

Pricing is a central part of the release. OpenAI says cached input for GPT-6.1 Sol costs $0.10 per million tokens, which it describes as 95% less than standard input pricing and 50% less than GPT-6 Sol’s cached input pricing.

OpenAI also says GPT-6.1 Sol shows substantial improvements over GPT-6 Sol in its alignment evaluations, bringing it closer to GPT-6 Astra. The company says the model is more transparent about its limitations and more reliable at respecting user intent and safety constraints.

GPT-6.1 Sol is available starting today to Plus, Pro, Business, Enterprise, and Edu users in ChatGPT Work and Codex. Developers can also access it through the API as gpt-6.1-sol. OpenAI says it is not yet available in Chat.