GPT-6.1 Sol Replaces GPT-6 Sol — Same Premium Band

October 1, 2026

GPT-6.1 Sol is in the model picker, in the seat GPT-6 Sol held. OpenAI's newest Sol lands close to GPT-6 Astra on agentic coding, computer use, and professional work, and is a clear step up from GPT-6 Sol on programming, debugging, document understanding, and long multi-step workflows. Same 1.05M-token context, 128K max output, tools, Swarm, and complexity-aware reasoning, on the same Premium 6× band. Open a GPT-6 Sol conversation and the next turn runs on GPT-6.1 Sol. You do not re-pin. GPT-6 Luna, GPT-6 Astra, and GPT-5.6 Terra are unchanged.

What you can do

• Pick GPT-6.1 Sol from Recommended or Closed SOTA — OpenAI's newest Sol, built for complex coding, agentic workflows, and professional work. Quality 69, Premium 6×, Auto and Swarm eligible.
• Start from the new-chat card. It says Try out the latest GPT-6.1 Sol, Claude Sonnet 5.5 and Opus 5.5 and opens the picker on the GPT-6.1 Sol row.
• Get Astra-class answers on the everyday band. OpenAI reports GPT-6.1 Sol within two percentage points of GPT-6 Astra on factual accuracy at every effort level. Its biggest gain over GPT-6 Sol is at low effort, where responses with a factual error drop from 11.4% to 7.7% — the Fast setting gets noticeably more reliable.
• Run longer agent loops. OpenAI built GPT-6.1 Sol to plan, edit, test, and iterate across a codebase, with better results on extended workflows that chain many tool calls. Point it at a repo in Beast mode and let it finish the job.
• Trust it to say when it's stuck. OpenAI reports GPT-6.1 Sol is more transparent about its limits and more reliable at honouring your constraints — it flags a broken search tool or an impossible instruction instead of pressing on.
• Keep working in an existing GPT-6 Sol thread. The picker shows GPT-6.1 Sol and the next message runs on it. Saved model preferences roll forward the same way.
• Scale effort the same way. Fast / Medium / Beast and the complexity router still map onto low / medium / high effort and verbosity, with pro mode at the top band.

Where this shows up

You have a GPT-6 Sol analysis open from last week. Open it and keep going — the picker says GPT-6.1 Sol, and the same thread continues at the same Premium 6×.

You pin Sol for refactors and tool-heavy research loops. The same jobs now come back with fewer wrong turns, on the same band.

You run Fast mode for triage and quick drafts. Low effort is where GPT-6.1 Sol improved most, so those quick answers get fewer factual slips.

Try it

• Pick GPT-6.1 Sol, then: "Challenge this market-entry plan, research the missing evidence, and produce a board-ready recommendation."
• Pin GPT-6.1 Sol in Beast mode, then: "Take over this half-finished migration: read the repo, figure out what's left, and finish it — flag anything you had to decide on the way."
• Pick GPT-6.1 Sol in Fast mode, then: "Read these five supplier contracts and list every clause that differs from our standard terms, with the page it's on."

Heads up

• Same band — Premium 6×. GPT-6.1 Sol sits exactly where GPT-6 Sol did. Your plan quota and token balance do not change.
• GPT-6 Sol is retired from the picker, Auto, and Swarm. Sessions and saved preferences pinned to it roll forward to GPT-6.1 Sol. Stored pins update when you open the chat or send the next message. GPT-5.6 Sol pins, already rolling forward to GPT-6 Sol, now land on GPT-6.1 Sol too.
• GPT-6 Luna, GPT-6 Astra, and GPT-5.6 Terra stay exactly as they were — same seats, same bands. Argus heartbeats still default to GPT-6 Luna.
• No harness numbers yet. Can it Run Alfrada? does not show GPT-6.1 Sol until it has a full run.