OpenAI brings GPT-6 models and Codex workflows to Google Cloud’s Model Garden

OpenAI and Google Cloud announced on 21 October 2026 that OpenAI’s frontier models and Codex agentic workflows are coming to Google Cloud’s Model Garden. Google Cloud’s blog states that GPT-6 Astra, GPT-6.1 Sol and GPT-6 Luna are rolling out in private preview to select enterprise customers on 21 October, and that developers can connect local Codex CLI and Desktop workflows directly to Google Cloud’s Gemini platform for inference. OpenAI’s post says general availability is planned in the coming weeks and notes that Microsoft remains OpenAI’s primary cloud partner.

Transactions run through the Google Cloud Marketplace, so OpenAI usage appears on a single Google Cloud invoice, draws down existing Google Cloud spend commitments and counts toward Flexible Savings Plans across model providers. Both companies say OpenAI models will also be added to Google Antigravity and Google Cloud’s Gemini Agent.

Google Cloud says the models run on dedicated Google Cloud infrastructure behind isolated gateways, VPC Service Controls and unified audit logging, with customer prompts and outputs kept inside the organisation’s data perimeter and never used to train foundation models. Zero Data Retention and Confidential Compute options are listed as coming later, and neither company published Model Garden token prices.