<p>OpenAI released GPT-6.1 Sol on September 29, 2026, an upgrade to GPT-6 Sol. It reaches near-Astra results on agentic coding, computer use and professional work at one-fifth of Astra's token prices. It costs $2 input and $10 output per million tokens, and cached input drops to $0.10. It is available now through the OpenAI API, ChatGPT Work and Codex.</p> <p>The post <a href="https://www.marktechpost.com/2026/09/30/openai-releases-gpt-6-1-sol-near-astra-coding-and-computer-use-at-one-fifth-of-a