Bug type

Bug / regression in newly added Codex OAuth image generation path

Summary

I’m trying to use:

• model: openai/gpt-image-2
• auth: OpenAI Codex OAuth
• no OPENAI_API_KEY
• no Gemini fallback

OpenClaw does select the Codex OAuth image path, but direct image generation fails with HTTP 403.

Separately, the chat-agent image_generate tool may still fall back to Gemini even when:

• agents.defaults.mediaGenerationAutoProviderFallback=false
• no image fallbacks are configured
• explicit model is openai/gpt-image-2

These appear to be two related but distinct issues.

Goal / expected behavior

OpenClaw should successfully generate images with:

• openai/gpt-image-2
• authenticated through OpenAI Codex OAuth

without requiring OPENAI_API_KEY, and without silently falling through to Gemini when fallback is disabled.

OpenClaw version

2026.4.23 (a979721)

Operating system

Linux VPS

Install method

Global npm install

Relevant config