[JS] 400 Unknown parameter: 'response_format'. when calling to openai/gpt-image-1 model

[tzuhaohuang]

Describe the bug
When using openai/gpt-image-1 to create an image, I'm getting the following error
400 Unknown parameter: 'response_format'. Error: 400 Unknown parameter: 'response_format'. at Function.generate

Params
Model: openai/gpt-image-1
Model Version: Unspecified
Size: 1024x1024
Style: vivd
User: Default
Quality: hd
Response format: b64_json, I also tried url option and still got the same result

To Reproduce
Prompt file

---

model: openai/gpt-image-1
config:
temperature: 0.4
topK: 32
topP: 0.95
size: 1024x1024
style: vivid
quality: hd
response_format: b64_json
input:
schema:
text: string
output:
format: "media"

{{role "user"}}
Generate an image of {{text}}

Expected behavior
An image in the response

Screenshots
If applicable, add screenshots to help explain your problem.

Runtime (please complete the following information):

• OS: [e.g. Linux, MacOS]: MacOS 15.5

** Node version
20.11.1

Additional context
@genkit-ai/compat-oai: 1.15.5
genkit: 1.15.5
genkit-cli: 1.15.5