OpenAI frontier models including o1-preview, GPT-4o and Codex became available through Amazon Bedrock on 29 October 2024, according to the primary OpenAI announcement at https://openai.com/index/openai-frontier-models-and-codex-are-now-available-on-aws/. AWS documentation confirms inference endpoints for these models are provisioned directly in customer VPCs with existing Bedrock IAM controls. The integration follows the 2023 OpenAI-Azure partnership pattern and the 2024 Anthropic-Claude 3.5 Sonnet launch on the same Bedrock platform, both cited in AWS service timelines at https://aws.amazon.com/bedrock/. Enterprise accounts can now route traffic between OpenAI and Anthropic models without additional egress. Primary source data shows no new training or fine-tuning capabilities; only inference endpoints are exposed, matching the Bedrock model catalog structure already used for Llama 3.1 and Mistral Large.