Use 'BLOCK_LOW_AND_ABOVE' Only | Generated by AI
You’re seeing this error:
Only block_low_and_above is supported for safetySetting.
This happens when you set safety_filter_level="BLOCK_MEDIUM_AND_ABOVE" (or any other value) in GenerateImagesConfig for the Imagen‑4 models—but at the time of your request (August 2025), the API only allows "BLOCK_LOW_AND_ABOVE" for image safety filtering on those models (Google Cloud).
✅ How to fix your code
Simply update the safety_filter_level to the supported value:
from google import genai
from google.genai.types import GenerateImagesConfig
client = genai.Client()
image = client.models.generate_images(
model="imagen-4.0-generate-preview-06-06",
prompt="A dog reading a newspaper",
config=GenerateImagesConfig(
image_size="2K",
number_of_images=1,
safety_filter_level="BLOCK_LOW_AND_ABOVE",
person_generation="ALLOW_ADULT",
),
)
image.generated_images[0].image.save("output-image.png")
print(
f"Created image using {len(image.generated_images[0].image.image_bytes)} bytes"
)
safety_filter_level="BLOCK_LOW_AND_ABOVE": only this is supported for Imagen 4. Other thresholds like"BLOCK_MEDIUM_AND_ABOVE"will cause the 400 INVALID_ARGUMENT error (Medium, Google AI for Developers).number_of_images=1is explicit so it’s clear you’re requesting one image per call.
🧾 Other optional parameters:
person_generation="ALLOW_ADULT"is the default setting, but it’s fine to be explicit (blocks children; allows adult-domaint images) (Google Cloud).image_size="2K"is valid per your code—just make sure your SDK version supports it.
TL;DR — Quick checklist
| Step | What to do |
|---|---|
| ✅ 1 | Change safety_filter_level to "BLOCK_LOW_AND_ABOVE" |
| 🧾 2 | Keep person_generation="ALLOW_ADULT" (or omit for default) |
| 🚫 3 | Don’t use "BLOCK_MEDIUM_AND_ABOVE" or "BLOCK_ONLY_HIGH" |
| ⏱ 4 | Don’t change safety again until Google adds more levels |
Let me know if you get another error—happy to help!