Use Seedream in Hermes Agent.
Seedream is Bytedance's image generation model with strong typography rendering and up to 4K output. Hermes Agent calls it through the same RunAPI custom provider and API key used for chat — no extra plugins or GPU rentals.
Generate a 4K product hero image using Seedream through RunAPI.
Requirements:
- Use the RunAPI text_to_image endpoint via the custom:runapi provider.
- Set model to seedream-4.5-text-to-image.
- Read the API key from RUNAPI_API_KEY. Do not hardcode the key.
- Poll the task status endpoint until the task completes.
- Return the generated image URL from the task response.
curl -X POST https://runapi.ai/api/v1/task/text_to_image \
-H "Authorization: Bearer $RUNAPI_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "seedream-4.5-text-to-image",
"prompt": "A premium coffee bag on a marble countertop, warm morning light, bold serif text FRESH ROAST, 4K product photography"
}'
{
"task_id": "tsk_abc123",
"status": "pending",
"model": "seedream-4.5-text-to-image"
}
Use Seedream in Hermes Agent in three steps
Configure RunAPI
If you already set up RunAPI in Hermes Agent for chat, you are done. The same custom:runapi provider and RUNAPI_API_KEY handle image generation. If not, add the custom provider with base_url https://runapi.ai/v1 and run hermes doctor.
export RUNAPI_API_KEY=runapi_xxx
Call Seedream
Send a request to the text_to_image endpoint with model set to seedream-4.5-text-to-image. Include a text prompt describing the image. RunAPI returns a task ID immediately.
text_to_image
Get the result
Poll the task status endpoint with the returned task ID. When the status changes to completed, the response includes the generated image URL. RunAPI SDKs handle polling automatically.
task_id: tsk_abc123
Seedream API parameters
| Parameter | Type | Description |
|---|---|---|
model |
string |
Required. seedream-4.5-text-to-image, seedream-4.5-edit, seedream-5-lite-text-to-image. |
prompt |
string |
Text description of the desired image. |
size |
string |
Optional. Output dimensions. Supports up to 4K. |
image_url |
string |
Source image for editing mode. |
What is Seedream on Hermes Agent?
Seedream by ByteDance is the LM Arena leaderboard-topping image model known for professional-grade output that reviewers call a "huge leap in fidelity." It understands complex prompt structures and delivers out-of-the-box results for both photorealistic and stylized content, with particular strength in maintaining a consistent house style across batch generation. Hermes Agent calls it through the RunAPI custom provider.
Seedream use cases
Social media marketing campaigns
Generate consistent brand ambassador images across an entire campaign, with the model maintaining the same character appearance and brand identity across dozens of outputs.
Book covers and packaging design
Create book covers, product packaging, and label designs with accurate text rendering and precise layout control at 4K resolution.
Brand identity development
Explore multiple visual directions for brand identity -- logos, color schemes, and product mockups -- with Seedream's strong prompt adherence keeping each variation true to the brief.
Seedream + Hermes Agent questions
Yes. Configure RunAPI as a custom provider in Hermes Agent with base_url https://runapi.ai/v1, then call the text_to_image endpoint with model set to seedream-4.5-text-to-image. The same API key handles both chat and image generation.
No. The same RUNAPI_API_KEY you configured for the custom:runapi provider also calls Seedream and every other image model in the RunAPI catalog. One key, one billing account.
Seedream achieves roughly 94% text accuracy, which puts it among the top tier for typography in generated images. It handles multi-line text, mixed fonts, and text on curved surfaces better than most competitors. For the absolute best text rendering, compare with Ideogram V3 on the same prompt.
Yes. Hermes Agent can orchestrate Seedream for initial generation, pass the output to Flux Kontext for targeted edits, and then route the result to Topaz for final upscaling, all in a single agent workflow.
Yes. Describe the character in detail in each prompt and Seedream maintains facial features, proportions, and styling across outputs. This makes it practical for social media campaigns where a brand ambassador needs to appear consistently across dozens of images.
Seedream is strongest at maintaining a consistent house style across large batches and handles complex multi-object prompts well. Imagen 4 offers better value per image at the low end with its Fast tier. Nano Banana leads on world knowledge integration. Pick based on whether you need batch consistency, low cost, or contextual awareness.
Hermes Agent general setup
Not configured yet? Start with the RunAPI setup guide for Hermes Agent.
Hermes Agent setup guide →Try Seedream in Hermes Agent today.
Get a free RunAPI key, configure the custom provider, and start generating 4K images with Seedream.