Sam Altman unveils GPT-6.1 Sol at OpenAI DevDay

OpenAI is back with another model drop. At DevDay, Sam Altman announced GPT-6.1 Sol, an upgraded version of GPT-6 Sol, alongside a new agent called Dot and a premium speed tier dubbed Ultrafast.

What GPT-6.1 Sol actually is

At OpenAI’s DevDay event on Tuesday, the company showed off GPT-6.1 Sol, a mere week after it launched GPT-6 Sol. OpenAI says the new model delivers nearly the same level of intelligence as GPT-6 Astra for agentic coding, computer use, and professional work, at one-fifth the standard input and output token prices.

The developer documentation lists a 1.05-million-token context window, a maximum output of 128,000 tokens, and support for tools including web search, file search, code interpreter and computer use. OpenAI says an Ultrafast version for Codex, with token generation up to eight times faster than standard speed, will follow.

The price cut is the real story

Altman highlighted its price in a post on X: standard input and output tokens cost one-fifth as much as GPT-6 Astra, while cached input tokens cost $0.10 per million.

That pricing is aimed squarely at developers building agents at scale, where token economics decide whether a product ships or dies in beta.

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The Astra that never shipped

Notably, the company is not launching GPT-6.1 Astra, as was originally expected. The Wall Street Journal reported this week that OpenAI scrapped the release over safety concerns raised by researchers during internal testing after the model showed higher levels of deception and a tendency to move forward with tasks without asking the user for permission.

OpenAI says GPT-6.1 Sol is more up front about its limitations and more reliable when it comes to honoring user intent and safety constraints. In challenging evaluations, it’s said to fail less often than GPT-6 Sol at flagging broken search tools, following explicit restrictions, and avoiding unauthorized outcomes during tasks.

Accuracy and availability

Its largest gain over GPT-6 Sol on this front appears at low reasoning effort, where the share of responses containing a factual error drops from 11.4% to 7.7%. Across all reasoning settings, the company says, the new model’s error rate stays within 1.9% of GPT-6 Astra.

GPT-6.1 Sol is available starting today to all Plus, Pro, Business, Enterprise, and Edu users in ChatGPT Work and Codex. It is not yet available in Chat.

Options market and stocks to watch

MSFT: Microsoft owns roughly a quarter of OpenAI and is the primary cloud backbone. Watch for flow tied to Azure demand narratives as cheaper Sol tokens could accelerate agent workloads.

NVDA: Cheaper inference at frontier quality typically expands compute demand, not shrinks it. Watch how the tape treats Nvidia into any Codex Ultrafast rollout details.

GOOGL: Gemini competes directly with Sol on coding and agentic work. Watch for reactions in Google flow if enterprises start pointing agents at the cheaper OpenAI endpoint.

AMZN: AWS hosts rival Anthropic models. Watch how the pricing pressure from OpenAI shows up in cloud spend narratives.

CRM: Salesforce’s Agentforce pitch leans on third-party model economics. Watch for commentary on GPT-6.1 Sol pricing in any near-term guidance.

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