OpenAI GPT-5.6 arrives on Amazon Bedrock with cross-Region inference in 25+ Regions

AWS ML Blog · rss · 2026-08-21

OpenAI GPT-5.6 models are now available on Amazon Bedrock in 25+ AWS Regions with cross-Region inference (CRIS), per an AWS ML Blog post co-written with OpenAI. Three general-purpose variants — Sol, Terra, and Luna — are tuned for different capability/cost balances, all supporting text+image input, a 1M token context window, reasoning mode, server-side tool calling, and prompt caching.

CRIS works via inference profiles: a geographic profile (e.g., us.openai.gpt-5.6-terra) routes only within one geography for data residency; a global profile (global. prefix) routes to any supported commercial Region based on real-time capacity for the widest compute pool. Billing and quota are tracked at the account level.

Developers can point an existing OpenAI SDK client at Bedrock's OpenAI-compatible endpoint and swap the model parameter for the profile ID, using the Responses API, Chat Completions API, or Bedrock Converse API. For production, the aws-bedrock-token-generator package derives short-term bearer tokens from AWS credentials.

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