Celia Chen 80fb0704ee feat: update Bedrock Mantle endpoint and GPT-5.4 model ID (#20109) ...

## Summary

Amazon Bedrock Mantle's OpenAI-compatible endpoint now lives under
`/openai/v1`, and the GPT-5.4 Mantle model ID no longer uses the `-cmb`
suffix. This updates Codex's built-in Bedrock provider configuration so
generated providers and the static Bedrock catalog use the current
endpoint and model ID.

## Changes

- Update the Bedrock Mantle base URL from
`https://bedrock-mantle.{region}.api.aws/v1` to
`https://bedrock-mantle.{region}.api.aws/openai/v1`.
- Update the Amazon Bedrock default base URL in
`codex-model-provider-info`.
- Change the Bedrock GPT-5.4 catalog slug from `openai.gpt-5.4-cmb` to
`openai.gpt-5.4`.
- Align provider and catalog tests with the new URL and model ID.

## Test Plan

- Manual smoke test:

  ```shell
  target/debug/codex \
      -m openai.gpt-5.4 \
      -c 'model_provider="amazon-bedrock"' \
      -c 'model_providers.amazon-bedrock.aws.region="us-west-2"'
  ```

2026-04-29 01:37:21 +00:00

..

src

feat: update Bedrock Mantle endpoint and GPT-5.4 model ID (#20109)

2026-04-29 01:37:21 +00:00

BUILD.bazel

feat: add opt-in provider runtime abstraction (#17713)

2026-04-17 02:27:45 +00:00

Cargo.toml

feat: let model providers own model discovery (#18950)

2026-04-24 04:28:25 +00:00