OpenAI · GPT-6.1 Sol

GPT-6.1 Sol

Released 29 September at DevDay, one week after GPT-6 Sol (covered here in week 40). OpenAI says it nearly matches GPT-6 Astra on agentic coding, computer use and professional work at one-fifth of Astra's token prices. API pricing stays at $2 input, $0.10 cached input and $10 output per million tokens, with a 1,050,000-token context and 128,000-token maximum output. Reported results: a tie with Astra on DeepSWE, a narrow lead over Claude Opus 5.5 on AutomationBench, and a factual error rate cut from 11.4% to 7.7% at low reasoning effort compared with GPT-6 Sol. Available in ChatGPT Work and Codex on paid plans and in the API as gpt-6.1-sol. openai.com blocked automated reading, so details come from TechCrunch, DataCamp and Latent Space coverage; benchmarks are vendor-reported.