OpenAI’s models are coming to Google Cloud and Antigravity. What changes for Codex

What was announced

On October 21, 2026, OpenAI and Google Cloud said they are “partnering to bring OpenAI’s frontier models and Codex agentic workflows into Google Cloud’s Model Garden.” Google’s announcement names three models:

• GPT-6 Astra, for “demanding work across coding, computer use, professional tasks, and scientific research.”
• GPT-6.1 Sol, “near-Astra intelligence at lower cost.”
• GPT-6 Luna, “a fast, cost-efficient model for everyday work at scale.”

Companies buy them through Google Cloud Marketplace, so the usage appears on their Google Cloud invoice and draws down the cloud commitments they already have. OpenAI’s announcement adds that Microsoft “remains OpenAI’s primary cloud partner.”

What’s available, and when

What	Status on October 27
GPT-6 Astra, 6.1 Sol and 6 Luna in Model Garden	Private preview, select enterprise customers
General availability on Google Cloud	“In the coming weeks,” says OpenAI; not yet
Codex on Google’s inference	Built into Codex CLI 0.165.0 since October 27; no setup docs yet
OpenAI models in Google Antigravity	“Soon,” no date
OpenAI models in Gemini for business	“Soon,” no date
Zero data retention, Confidential Compute	“Coming soon”

To get in now, you register interest through Google’s form or OpenAI’s. Neither company published Google Cloud prices. OpenAI’s own API prices, per million tokens, are $10 in and $50 out for Astra, $2 and $10 for Sol, and $0.10 and $0.50 for Luna, each with a context window of 1.05 million tokens.

What it means for Codex users

If you use Codex on a ChatGPT plan, nothing changes. Neither announcement mentions ChatGPT plans, their limits or their prices.

If your company runs on Google Cloud, Codex can now bill there instead. Google says customers can “connect their local Codex CLI and Desktop workflows directly to our Gemini platform for inference,” and on October 27 the Codex changelog listed it for Codex CLI 0.165.0: “Added a built-in Google Cloud Vertex AI provider, configured with model_provider = "gcp".” The change itself shows how it works:

• Codex finds your project from GOOGLE_CLOUD_PROJECT and GOOGLE_CLOUD_LOCATION, with the location defaulting to global.
• It signs in with your Google Cloud credentials, from gcloud auth application-default print-access-token by default, and doesn’t need an OpenAI sign-in.
• Some features are switched off: web search, image generation, reasoning summaries and custom tools.

You still need access to OpenAI’s models on Google Cloud, which is by private preview until general availability. Codex’s documentation had no Google Cloud page by October 27. Its page for Amazon Bedrock, another cloud Codex can run on, shows what else to expect: the CLI, the desktop app and the editor extension all read the same ~/.codex/config.toml, requests go to the cloud rather than OpenAI’s servers, and features that live in OpenAI’s cloud, such as Codex cloud tasks, Fast mode and plugins that need a ChatGPT sign-in, don’t come along. That last part is our reading of the Bedrock precedent, not something either company has said about Google Cloud.

What it means for Antigravity users

Not much yet. As of October 27, Antigravity’s models page lists no OpenAI frontier model. The one OpenAI model it has, the open GPT-OSS-120b, is removed from every plan on November 18, a date Google moved from November 2, along with Claude Sonnet 4.6 and Opus 4.6 (see our memo on that change). Neither company has said which Antigravity plans will get GPT when it arrives.

Using GPT and Gemini together today

You don’t have to wait for one app to carry both labs. Enjoy runs Codex on your ChatGPT plan and Antigravity on your Google account side by side, with Claude Code and the other labs’ agents beside them. Start a job with Gemini, switch the conversation to Codex when GPT suits it better, and the work comes with you. Enjoy is a monthly subscription, with the first seven days free (pricing); each agent runs on the plan you already have.

We’ll update this memo when Google publishes the Codex setup or GPT arrives in Antigravity.