openclaw/docs/providers/fal.md

summary	title	read_when
fal image, video, and music generation setup in OpenClaw	Fal	You want to use fal image generation in OpenClaw You need the FAL_KEY auth flow You want fal defaults for image_generate, video_generate, or music_generate

OpenClaw ships a bundled fal provider for hosted image, video, and music generation.

Property	Value
Provider	fal
Auth	FAL_KEY (canonical; FAL_API_KEY also works as a fallback)
API	fal model endpoints (https://fal.run; video jobs use https://queue.fal.run)
Base URL	Override with models.providers.fal.baseUrl

Getting started

Create a key at [fal.ai/dashboard/keys](https://fal.ai/dashboard/keys). ```bash openclaw onboard --auth-choice fal-api-key ```

Non-interactive setups can pass `--fal-api-key <key>` or export `FAL_KEY`.
Onboarding also sets `fal/fal-ai/flux/dev` as the default image model when
none is configured.

```json5 { agents: { defaults: { mediaModels: { image: { primary: "fal/fal-ai/flux/dev", }, }, }, }, } ```

Image generation

The bundled fal image-generation provider defaults to fal/fal-ai/flux/dev.

Capability	Value
Max images	4 per request; Krea 2: 1 per request
Size overrides	1024x1024, 1024x1536, 1536x1024, 1024x1792, 1792x1024
Aspect ratio	Supported everywhere except Flux image-to-image
Resolution	1K, 2K, 4K (per-model limits below)
Output format	png (default) or jpeg; GPT Image 2.5 also supports webp; Krea 2 rejects overrides

Edit requests (reference images via the shared image / images parameters) route to a per-model edit endpoint with per-model reference limits:

Model family	Model ref after fal/	Edit endpoint	Max reference images
Flux and other fal models	fal-ai/flux/dev (default)	/image-to-image	1
GPT Image 2.5	openai/gpt-image-2.5/{flare,sunburst}/text-to-image	sibling /edit	16
Older GPT Image	openai/gpt-image-*	/edit	10
Grok Imagine	xai/grok-imagine-image	/edit	3
Nano Banana (legacy)	fal-ai/nano-banana	/edit	3
Nano Banana 2	fal-ai/nano-banana-*	/edit	14
Nano Banana 2 Lite	google/nano-banana-2-lite	/edit	14
Krea 2	krea/v2/{medium,large}/text-to-image	none (style refs)	10 style references

Flux image-to-image requests do **not** support `aspectRatio` overrides. GPT Image and Nano Banana 2 edit requests use fal's `/edit` endpoint and accept aspect-ratio hints. Nano Banana 2 also accepts extra-native wide/tall ratios such as `4:1`, `1:4`, `8:1`, and `1:8`; Krea 2 validates its own smaller aspect-ratio subset. Grok Imagine has its own ratio list (including `2:1`, `20:9`, `19.5:9`, and their inverses) and only accepts `1K`/`2K` resolutions; legacy Nano Banana and Nano Banana 2 Lite reject `resolution` overrides.

GPT Image 2.5

Select either variant:

• fal/openai/gpt-image-2.5/flare/text-to-image
• fal/openai/gpt-image-2.5/sunburst/text-to-image

References select the sibling /edit endpoint. You can also select fal/openai/gpt-image-2.5/flare/edit or fal/openai/gpt-image-2.5/sunburst/edit explicitly.

Both variants support quality: "low", "medium", "high", "xhigh", "max", or "auto". The fal default is high. They accept background: "transparent", "opaque", or "auto". For transparency, use outputFormat: "png" or "webp". These controls do not change older fal models.

Use size: "auto" or explicit dimensions such as 1536x864. Dimensions must be divisible by 16, with no edge above 3840 pixels. Total pixels must be 655,360-8,294,400, with an aspect ratio from 1:3 to 3:1. OpenClaw converts aspect-ratio hints to valid dimensions. For example, aspectRatio: "3:2" produces 1536x1024. Use size to choose exact dimensions. OpenClaw rejects invalid explicit sizes. These models reject resolution overrides. Edits without geometry hints keep fal's automatic size selection.

openclaw infer image generate \
  --model fal/openai/gpt-image-2.5/flare/text-to-image \
  --prompt "A simple red circle sticker" \
  --quality low --size 1024x1024 --json

openclaw infer image edit \
  --model fal/openai/gpt-image-2.5/sunburst/edit \
  --file /path/to/reference.png \
  --prompt "Keep the shape and change the color to blue" \
  --quality low --size auto --json

Krea 2

Krea 2 models use fal's native Krea payload schema. OpenClaw sends aspect_ratio, creativity, and image_style_references instead of the generic image_size / edit-endpoint payload used by Flux. The model refs are:

• fal/krea/v2/medium/text-to-image
• fal/krea/v2/large/text-to-image

Use Medium for faster expressive illustration, anime, painting, and artistic styles. Use Large for slower photoreal, raw texture, film grain, and detailed looks. Krea defaults to fal.creativity: "medium"; supported values are raw, low, medium, and high.

Krea 2 exposes aspect ratio, not image_size, in fal's request schema. Prefer aspectRatio; OpenClaw maps size to the closest supported Krea aspect ratio and rejects resolution for Krea rather than dropping it.

Use outputFormat: "png" when you want PNG output from fal models that expose output_format. Outside GPT Image 2.5, fal models do not declare a transparent-background control in OpenClaw. They report background as an ignored override. Krea 2 endpoints do not expose an output_format request field through fal, so OpenClaw rejects outputFormat overrides for Krea requests.

To use Krea 2 Medium:

{
  agents: {
    defaults: {
      mediaModels: {
        image: {
          primary: "fal/krea/v2/medium/text-to-image",
        },
      },
    },
  },
}

Video generation

The bundled fal video-generation provider defaults to fal/fal-ai/minimax/video-01-live.

Capability	Value
Modes	Text-to-video, single-image reference, Seedance reference-to-video
Runtime	Queue-backed submit/status/result flow for long-running jobs
Timeout	20 minutes per job by default; status polled every 5 seconds

**MiniMax (default):**

- `fal/fal-ai/minimax/video-01-live`

**HeyGen video-agent:**

- `fal/fal-ai/heygen/v2/video-agent`

**Kling and Wan:**

- `fal/fal-ai/kling-video/v2.1/master/text-to-video`
- `fal/fal-ai/wan/v2.2-a14b/text-to-video`
- `fal/fal-ai/wan/v2.2-a14b/image-to-video`

**Seedance 2.0:**

- `fal/bytedance/seedance-2.0/fast/text-to-video`
- `fal/bytedance/seedance-2.0/fast/image-to-video`
- `fal/bytedance/seedance-2.0/fast/reference-to-video`
- `fal/bytedance/seedance-2.0/text-to-video`
- `fal/bytedance/seedance-2.0/image-to-video`
- `fal/bytedance/seedance-2.0/reference-to-video`

MiniMax Live and HeyGen requests send only the prompt plus an optional
single reference image; other overrides are not forwarded. Seedance models
accept `aspectRatio`, `size`, `resolution`, durations of 4-15 seconds, and
an audio toggle.

```json5 { agents: { defaults: { mediaModels: { video: { primary: "fal/bytedance/seedance-2.0/fast/text-to-video", }, }, }, }, } ``` ```json5 { agents: { defaults: { mediaModels: { video: { primary: "fal/bytedance/seedance-2.0/fast/reference-to-video", }, }, }, }, } ```

Reference-to-video accepts up to 9 images, 3 videos, and 3 audio references
through the shared `video_generate` `images`, `videos`, and `audioRefs`
parameters, with at most 12 total reference files. Audio references require
at least one image or video reference in the same request.

```json5 { agents: { defaults: { mediaModels: { video: { primary: "fal/fal-ai/heygen/v2/video-agent", }, }, }, }, } ```

Music generation

The bundled fal plugin also registers a music-generation provider for the shared music_generate tool.

Capability	Value
Default model	fal/fal-ai/minimax-music/v2.6
Models	fal-ai/minimax-music/v2.6 (mp3), fal-ai/ace-step/prompt-to-audio (wav), fal-ai/stable-audio-25/text-to-audio (wav)
Max duration	240 seconds
Runtime	Synchronous request plus generated audio download

Use fal as the default music provider:

{
  agents: {
    defaults: {
      mediaModels: {
        music: {
          primary: "fal/fal-ai/minimax-music/v2.6",
        },
      },
    },
  },
}

fal-ai/minimax-music/v2.6 supports explicit lyrics and instrumental mode, but not both in the same request. ACE-Step and Stable Audio are prompt-to-audio endpoints; choose them with the model override when you want those model families. ACE-Step rejects explicit lyrics; Stable Audio rejects both lyrics and instrumental mode.

The tables and accordions above cover the model families the bundled fal provider special-cases. Other fal image endpoint ids can still be selected as the image model; they are treated like Flux (generic `image_size` payload, one reference image via `/image-to-image`).

Related

Shared image tool parameters and provider selection. Shared video tool parameters and provider selection. Shared music tool parameters and provider selection. Agent defaults including image, video, and music model selection.