Gets close to GPT-6 Astra on complex coding and agent work at about a fifth of the token price, which suits long, repeated runs. It has a 1.05M tokens context window. Through OpenAI’s API it costs $2.00 per million input tokens and $10.00 per million output tokens.
Among the tools we track, it’s available in Codex, Copilot, Zed and Amp. OpenAI recommends it as the replacement for GPT-5.5 on paid ChatGPT plans. Codex uses a 500K default context, and prompts over 272K tokens cost more.
Related changes
- GPT-6.1 Terra arrives in Codex on paid ChatGPT plans · October 26, 2026
- Copilot retires GPT-5.5, GPT-5.4, GPT-5 mini, Grok 4.5 and Gemini 3.7 Flash · October 19, 2026
- GPT-5.5 retired from Codex for ChatGPT sign-in · October 14, 2026
- GPT-6.1 Sol Ultrafast arrives in Codex, at 8x included usage · October 8, 2026
- Zed 1.22 lets subagents use different models and adds GPT-6.1 Sol and Grok 4.7 · September 30, 2026
- GPT-6.1 Sol arrives in Codex · September 29, 2026
Sources
- developers.openai.com: gpt 6.1 sol
- learn.chatgpt.com: models
- docs.github.com: supported models
- zed.dev: models
- ampcode.com: models
Facts last checked November 15, 2026.