GPT-5.4 changelog

Every change to GPT-5.4 that Modelpeers has recorded, newest first, each with the source it came from. The record starts Jun 1, 2026.

All (4)Releases (1)Retiring (3)

June 2026

GPT-5.5 and GPT-5.4

2 models from OpenAI

Now availableJun 1, 2026

OpenAI models available in Amazon Bedrock

GPT-5.4 and GPT-5.5 became available in Amazon Bedrock through an OpenAI-compatible Responses API endpoint, with models and features varying by AWS Region.

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