Summary

GPT-5.5 was released today (April 23, 2026) and is available on ChatGPT and Codex for all paid subscribers. However, the openai-codex provider in OpenClaw does not recognize gpt-5.5 as a valid model.

Current Behavior

• Setting openai-codex/gpt-5.5 as primary model results in: Unknown model: openai-codex/gpt-5.5
• Gateway startup warmup fails with the same error
• Sessions fall back to the next available model in the fallback chain

Expected Behavior

openai-codex/gpt-5.5 should be recognized and routed to the Codex/ChatGPT OAuth provider, just like gpt-5.4 and gpt-5.4-pro are today.

References

• OpenAI announcement: https://openai.com/index/introducing-gpt-5-5/
• Codex model docs confirm availability via ChatGPT sign-in: https://developers.openai.com/codex/models
• Previous issue for GPT-5.4 support: Add support for GPT-5.4 (released 2026-03-05) #38759

Environment

• OpenClaw version: 2026.4.22
• Provider: openai-codex (OAuth mode)
• Auth profile: ChatGPT Pro subscription

Logs

startup model warmup failed for openai-codex/gpt-5.5: Error: Unknown model: openai-codex/gpt-5.5
FailoverError: Unknown model: openai-codex/gpt-5.5