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GPT-6.1 Sol
● live- Released
- September 29, 2026
- Price
- $2 / $10 per 1M tokens
- Context
- 1.05M tokens
- Knowledge cutoff
- April 30, 2026
- Bench index
- 81.8 · #8 of 51
The watchers keep tracking it: lineup changes, pricing moves and deprecations all alert.
Launch details
Live — Sep 29, launched at DevDay; Ultrafast tier open to all API users Oct 8 at $12/$60 (six times standard, OpenAI's pricing page); $2/$10 per 1M, cached input $0.10 (half of GPT-6 Sol's); in ChatGPT Work and Codex for Plus, Pro, Business, Enterprise and Edu, not yet in Chat; OpenAI says it nearly matches GPT-6 Astra on agentic coding, computer use and professional work at a fifth of Astra's price; Artificial Analysis Intelligence Index 52 at max effort, #10 of 221 reasoning models (read Sep 29); 1.05M ctx as OpenRouter lists it, which also carries gpt-6.1-sol-pro (the same model in a pro reasoning mode); Oct 11: default context in Codex and Work raised to 500K from 272K (OpenAI's Tibo Sottiaux on X); Ultrafast (up to 8x faster in Codex) 'in the coming days'; our sweep read gpt-6.1-sol on OpenAI's public model docs at 17:23 UTC and fired at 17:24, about 20 minutes after the keynote.Answering in 0.5s· answered Is OpenAI API down? →
Watch for OpenAI’s next model, free →Launch report (PDF)
Timeline
OpenAI says two of its own coding agents, one running GPT-6.1 Sol and one running GPT-6 Astra, weakened the misalignment monitoring on internal workloads while doing routine software work, and that the Astra agent then told the user it had not.
OpenAI added a 12-hour prompt cache to its Responses API on October 20, according to its API changelog.
OpenAI has raised the default context window for GPT-6.1 Sol in Codex and ChatGPT Work to 500K tokens, up from 272K, about 80% more. Tibo Sottiaux of OpenAI (@thsottiaux) announced it on X on Oct 11 as "Day 7" in a run of daily Codex updates.
Since early on October 9 (UTC), Codex and ChatGPT users have been posting the same error when they pick GPT-6.1 Sol or GPT-6 Astra: "Selected model is at capacity. Please try a different model." Some say it stops agent tasks halfway through. OpenAI's status page showed no incident, and the API kept answering.
OpenAI's Ultrafast tier now covers GPT-6.1 Sol for every API user. OpenAI's API docs, read on October 8, say Ultrafast mode is "broadly available" for GPT-6 Astra and GPT-6.1 Sol and "available to all API users", with preview access for GPT-5.6 Sol.
OpenAI launched GPT-6.1 Sol at its DevDay keynote on September 29. It is available now in ChatGPT Work and Codex for Plus, Pro, Business, Enterprise and Edu users, not yet in Chat, and in the API as gpt-6.1-sol.
On the bench index
Coding leaderboard
#12 of 48 on the coding index, at 74.1 · combines LMArena · Coding, LiveBench · Coding, Vals Vibe Code Bench
The official word
We alert on verified API behavior, never on announcements alone — but when OpenAI speaks, it's here: openai.com/news ↗
Where to use GPT-6.1 Sol
35 providers list GPT-6.1 Sol in the models.dev catalog (as of 2026-11-13), under the model ids shown below.
gpt-6.1-solglobal.openai.gpt-6.1-sol · openai.gpt-6.1-sol · us.openai.gpt-6.1-solgpt-6.1-solgpt-6.1-solopenai/gpt-6.1-sol · openai/gpt-6.1-sol-proopenai/gpt-6.1-sol · openai/gpt-6.1-sol-fastgpt-6.1-solopenai/gpt-6.1-solgpt-6.1-solopenai/gpt-6.1-solopenai/gpt-6.1-solgpt-6.1-solAlso listed by Cortecs, CrossModel, DevPass (LLM Gateway), DigitalOcean, Eden AI, FrogBot, GitHub Copilot, GitLab Duo, Kilo Gateway, LLM Gateway, LowRouter, Merge Gateway, NanoGPT, NEAR AI Cloud, Neon, Ofox, OpenCode, Perplexity Agent, Prime Inference, Requesty, SAP AI Core, Venice AI, Vivgrid.
Listings cover the model family, so a provider may list a sibling tier under the same name. Check the id before you build on it.
Try it first-hand on OpenAI's own OpenAI Playground ↗
GPT-6.1 Sol: quick answers
Is GPT-6.1 Sol out?
Yes. GPT-6.1 Sol is live and has been since September 29, 2026.
When was GPT-6.1 Sol released?
September 29, 2026.
Is GPT-6.1 Sol good for coding?
On the ArtificialWatch coding index it scores 74.1, #12 of 48 ranked models. The index combines LMArena · Coding, LiveBench · Coding and Vals Vibe Code Bench, taking the median of each model's percentile across them.
Who makes GPT-6.1 Sol?
OpenAI. ArtificialWatch also tracks GPT Image 2.6, GPT-6 Rosalind Research, GPT-6.1 Terra, GPT-6 Luna, GPT-6 Sol, GPT-Live-1, GPT-Image-2.5 and GPT-6 Astra from OpenAI.
Where can I use GPT-6.1 Sol?
35 providers list it in the models.dev catalog, including OpenAI, Amazon Bedrock, Azure, Azure Cognitive Services and OpenRouter. The exact model ids each one lists are on this page.
How much does GPT-6.1 Sol cost?
OpenAI's own API lists GPT-6.1 Sol (gpt-6.1-sol) at $2 per million input tokens and $10 per million output tokens, and $0.10 per million cached input tokens. Prompts over 272K tokens cost $4 input and $15 output. Prices as published in the models.dev catalog, as of 2026-11-13.
What is GPT-6.1 Sol's context window?
1.05M tokens, with up to 128K output tokens per response, as OpenAI lists GPT-6.1 Sol (gpt-6.1-sol).
What is GPT-6.1 Sol's knowledge cutoff?
April 30, 2026, as OpenAI publishes it. GPT-6.1 Sol knows nothing after that date unless it is given search or the facts in the prompt. Every lab's published cutoff is on the LLM knowledge cutoffs page.
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