Image

Flux 2 Klein 9B

Credit-based pricing. Supports batch up to 4.

Try Flux 2 Klein 9B →Compare models

Output

image

Aspect ratio

1:1, 16:9, 9:16, 4:3, 3:4, 21:9, 9:21, Custom

Resolution

512, 1024, 2048, 4096

Max batch

Inputs

Batch up to 4 per request

Example prompt

A vibrant open-air night market filled with colorful lanterns, glowing signs, hanging fabrics, fresh fruit stands, and crowds of people moving through narrow streets. Energetic atmosphere, cinematic photography, ultra detailed textures, rich saturated colors

Try this prompt →

LLM-ready

API & LLM schema

Exact request contract for this model. Agents can fetch it from /api/v1/models?id=fal-ai/flux-2/klein/9b.

POST/api/v1/generate14 fields · 2 required

Field	Type	Requirement	Contract
`model_id`	constant	Required	ArtEmotion model identifier.
`extra`	object	Optional	Model-specific settings may also be nested here.
`max_credits`	number	Optional	Reject before submission if the estimated list price exceeds this cap. · Range: 1–…
`webhook_url`	string	Optional	Format: uri
`webhook_secret`	string	Optional	Optional model input.
`folder_id`	string	Optional	Optional model input.
`prompt`	string	Required	Optional model input.
`num_inference_steps`	number	Optional	The number of inference steps to perform. · Default: 4 · Range: 4–8
`seed`	integer	Optional	The seed to use for the generation. If not provided, a random seed will be used.
`enable_safety_checker`	boolean	Optional	If set to true, the safety checker will be enabled. · Default: true
`output_format`	string	Optional	The format of the generated image. · Allowed: jpeg, png, webp · Default: png
`aspect_ratio`	string	Optional	Allowed: 1:1, 16:9, 9:16, 4:3, 3:4, 21:9, 9:21, Custom
`resolution`	string	Optional	Allowed: 512, 1024, 2048, 4096
`num_images`	integer	Optional	Range: 1–4

Minimal request example

{
  "model_id": "fal-ai/flux-2/klein/9b",
  "prompt": "A vibrant open-air night market filled with colorful lanterns, glowing signs, hanging fabrics, fresh fruit stands, and crowds of people moving through narrow streets. Energetic atmosphere, cinematic photography, ultra detailed textures, rich saturated colors"
}

Raw JSON Schema

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://www.artemotion.ai/api/v1/models?id=fal-ai%2Fflux-2%2Fklein%2F9b",
  "title": "Flux 2 Klein 9B generation request",
  "description": "Request body accepted by POST /api/v1/generate for fal-ai/flux-2/klein/9b.",
  "type": "object",
  "properties": {
    "model_id": {
      "type": "string",
      "const": "fal-ai/flux-2/klein/9b",
      "description": "ArtEmotion model identifier."
    },
    "extra": {
      "type": "object",
      "additionalProperties": true,
      "description": "Model-specific settings may also be nested here."
    },
    "max_credits": {
      "type": "number",
      "minimum": 1,
      "description": "Reject before submission if the estimated list price exceeds this cap."
    },
    "webhook_url": {
      "type": "string",
      "format": "uri",
      "maxLength": 2048
    },
    "webhook_secret": {
      "type": "string",
      "maxLength": 512
    },
    "folder_id": {
      "type": "string"
    },
    "prompt": {
      "type": "string"
    },
    "num_inference_steps": {
      "title": "Steps",
      "description": "The number of inference steps to perform.",
      "default": 4,
      "type": "number",
      "minimum": 4,
      "maximum": 8,
      "multipleOf": 1
    },
    "seed": {
      "title": "Seed",
      "description": "The seed to use for the generation. If not provided, a random seed will be used.",
      "type": "integer"
    },
    "enable_safety_checker": {
      "title": "Enable Safety Checker",
      "description": "If set to true, the safety checker will be enabled.",
      "default": true,
      "type": "boolean"
    },
    "output_format": {
      "title": "Output Format",
      "description": "The format of the generated image.",
      "default": "png",
      "type": "string",
      "enum": [
        "jpeg",
        "png",
        "webp"
      ]
    },
    "aspect_ratio": {
      "type": "string",
      "enum": [
        "1:1",
        "16:9",
        "9:16",
        "4:3",
        "3:4",
        "21:9",
        "9:21",
        "Custom"
      ]
    },
    "resolution": {
      "type": "string",
      "enum": [
        "512",
        "1024",
        "2048",
        "4096"
      ]
    },
    "num_images": {
      "type": "integer",
      "minimum": 1,
      "maximum": 4
    }
  },
  "required": [
    "model_id",
    "prompt"
  ],
  "additionalProperties": false
}

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FAQ

How much does Flux 2 Klein 9B cost on ArtEmotion?

Credit-based pricing. You pay in ArtEmotion credits — every plan and top-up converts USD to credits at a fixed rate.

Do I get my credits back if Flux 2 Klein 9B fails?

Yes — failed generations are never charged. The credits are released back to your balance automatically.

Can I call Flux 2 Klein 9B from the API?

Yes. Use POST /api/v1/generate with model_id: "fal-ai/flux-2/klein/9b". See the API reference for the full schema.

Where are my generations stored?

Every output is saved to your personal Library. You can export or delete everything any time from Privacy & deletion.

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