OpenAI's GPT 6.1 models are coming to Google Cloud and Antigravity

OpenAI and Google have agreed to bring OpenAI's frontier models to Google Cloud. According to Ars Technica, the full current GPT 6 and 6.1 lineup, named Astra, Sol and Luna, will arrive in Google's Model Garden in the coming weeks. OpenAI describes the arrangement as bringing its frontier models and Codex workflows to Model Garden, available through Google Cloud Marketplace.

The models will run entirely on Google's infrastructure, with transactions handled through the Marketplace. For businesses with established Google Cloud spending commitments, that should make it simple to start using GPT models in place of whatever they used before. Google says its system can move workloads between models based on performance, latency and efficiency, which matters because Astra is expected to cost the most to run.

Google says all three models are rolling out now in private preview for select enterprise customers. Others can request early access, which enables API access even for people using Codex CLI or Codex Desktop, with inference running on Google's systems. GPT models will also come to Antigravity, Google's agent-powered coding tool. Ars Technica notes that Google has not said whether all three will appear there.

Model Garden lists more than 200 options, including Gemini, open models like Mistral, Llama and Gemma, and Anthropic's Claude. With OpenAI added, Google says it is the only large cloud provider offering all three leading closed LLMs. OpenAI says Microsoft remains its primary cloud partner, so this widens its distribution rather than replacing an existing relationship.

The deal has a competitive edge for Google. Ars Technica reports that Google recently released Gemini 4 Argon, which it says restores parity with rivals, though the outlet says the model uses tokens at a very high rate. Customers unhappy with that tradeoff will now have another alternative inside the same cloud, billed against the same commitments. Antigravity users, who until now had Gemini and Claude, may also gain a third model family.

The first thing to watch is the move from private preview to wider availability in Model Garden, which Google puts at the coming weeks. Pricing for Astra, Sol and Luna on Google Cloud has not been detailed in the coverage.

Also open is which OpenAI models will actually be offered in Antigravity, since Google has not specified.