GPT-6.1 Sol
OpenAI · Released Sep 29, 2026
$2
Input price / MTok
#23 of 39$10
Output price / MTok
#25 of 391.1M
Context window
#6 of 40Summary
GPT-6.1 Sol is a proprietary language model from OpenAI, released on Sep 29, 2026.
At $2 input and $10 output per million tokens, it ranks #23 of 39 for input price, placing it mid-range on input cost.
Its context window of 1.1M tokens ranks #6 of 40 for context depth in this dataset.
It targets coding, agents, reasoning workloads.
Released Sep 29 2026 for complex coding, computer use and professional work at a lower cost than GPT-6 Astra; OpenAI's models page now lists it in the Sol slot of the GPT-6 family, at the same $2/$10 price as GPT-6 Sol. Adds Multi-agent in beta (the model can delegate work to subagents in a Responses API request) and, since Oct 8 2026, an Ultrafast mode (service_tier "ultrafast"). Text and image input, 922K max input tokens, reasoning effort low to max (no none or minimal). Use the Responses API for tool calling; Chat Completions works without tools. API identifier gpt-6.1-sol, knowledge cutoff Apr 30 2026. Sources: https://developers.openai.com/api/docs/models/gpt-6.1-sol and the OpenAI API changelog (checked 2026-10-23).
No independently verified benchmark scores are available for this model. Scores are only shown when independently confirmed with a source URL.