OpenAI introduced GPT-6.1 Sol on September 29, 2026, as an upgrade to GPT-6 Sol.
What to know
- It is available to ChatGPT Plus, Pro, Business, Enterprise and Edu users in ChatGPT Work and Codex, and to developers through the API as
gpt-6.1-sol. - OpenAI says it comes close to GPT-6 Astra on agentic coding, computer use and professional work, at about one-fifth of Astra’s standard input and output token prices.
- Cached input is priced at $0.10 per million tokens, according to OpenAI.
Why it matters
The headline is cost-performance: near-flagship results at a much lower price can change which model teams choose for everyday agent work. These figures are OpenAI’s own; independent benchmarks will tell more.
Source: OpenAI announcement. We summarise in our own words; check the source for the full details.