Bug type

Regression (worked before, now fails)

Beta release blocker

No

Summary

Environment:

• OpenClaw: 2026.5.28
• Codex plugin: 2026.5.28
• OS: Ubuntu (Sable)
• Authentication: OAuth / openai-codex:default
• Model: openai/gpt-5.5

Steps to reproduce

NOT_ENOUGH_INFO

Expected behavior

Expected Behavior:

• openai/gpt-5.5 should execute successfully through the Codex runtime.

Actual behavior

Actual Behavior:

• OpenClaw attempts to execute using openai-codex/gpt-5.5.
• Execution fails with:

Requested agent harness “codex” does not support openai/gpt-5.5

and/or

Unknown model: openai-codex/gpt-5.5

OpenClaw version

OpenClaw 2026.5.28 (e932160)

Operating system

Ubuntu 24.04.4 LTS (GNU/Linux 6.8.0-117-generic x86_64)

Install method

npm global

Model

openai/gpt-5.5

Provider / routing chain

TUI session model: openai/gpt-5.5 ↓ OpenClaw agent defaults agents.defaults.model = openai/gpt-5.5 ↓ provider/model parse provider = openai modelId = gpt-5.5 ↓ OpenClaw policy OpenAI provider uses Codex runtime by default ↓ runtime selected Runtime: OpenAI Codex runtime id = codex ↓ runtime provider rewrite provider openai → openai-codex ↓ execution target becomes openai-codex/gpt-5.5 ↓ failure Unknown model: openai-codex/gpt-5.5

Additional provider/model setup details

Evidence:

• openclaw models list –provider openai shows:
  • openai/gpt-5.4
  • openai/gpt-5.5
• openclaw models list –provider openai-codex shows no models.
• Standalone Codex CLI works correctly:
  • OpenAI Codex v0.133.0
  • GPT-5.5 executes successfully
  • Tool use functions normally

Diagnostics:

• Diagnostics ZIP attached:
  openclaw-diagnostics-2026-05-30T22-33-53-420Z-1252103.zip

Additional Investigation:

• openclaw.json validated successfully.
• No remaining agentRuntime overrides.
• Session cleanup completed successfully.
• Gateway healthy.
• OAuth healthy.
• Codex plugin version matches OpenClaw version.
• Issue appears to occur during OpenAI → Codex runtime/provider translation.

Observed Result:
Configured model: openai/gpt-5.5
Runtime: OpenAI Codex
Failure: Unknown model: openai-codex/gpt-5.5

Logs, screenshots, and evidence

Impact and severity

No response

Additional information

openclaw-diagnostics-2026-05-30T22-33-53-420Z-1252103.zip