OpenAI
OpenAI ships GPT-6.1 Sol
On Sept. 29, 2026, OpenAI introduced GPT-6.1 Sol, an upgrade to GPT-6 Sol. The company says it nearly matches GPT-6 Astra on agentic coding, computer use, and professional work at about one-fifth of Astra’s standard input and output token prices. The application programming interface model ID is gpt-6.1-sol. List prices are $2 per million input tokens, $0.10 per million cached input tokens, and $10 per million output tokens. It is available to Plus, Pro, Business, Enterprise, and Edu users in ChatGPT Work and Codex. It is not yet available in Chat. OpenAI says GPT-6.1 Sol Ultrafast, with up to 8 times faster token generation in Codex, is coming in the coming days. On DeepSWE v1.1, OpenAI says Sol matches Astra at roughly one-fifth the cost. The same day, OpenAI published an addendum to the GPT-6 Astra system card for GPT-6.1 Sol.
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