Models

The live catalog with credit prices, allowed aspect ratios and reference-image limits.

GET /v1/models returns the live catalog with prices and option lists. The table below is rendered from the same source, so it is always current.

Model id	Type	Credits	Aspect ratios	Reference images	Typical time
`seedream-5` Seedream 5.0 Lite	image	6 credits / image	1:1 4:3 3:4 16:9 9:16 2:3 3:2 21:9	up to 14	Not yet measured
`nano-banana` Nano Banana	image	6 credits / image	auto 1:1 2:3 3:2 3:4 4:3 4:5 5:4 9:16 16:9 21:9	up to 14	10–15 s
`nano-banana-pro` Nano Banana Pro	image	1K 14 · 2K 14 · 4K 28	auto 1:1 2:3 3:2 3:4 4:3 4:5 5:4 9:16 16:9 21:9	up to 14	10–20 s
`nano-banana-2` Nano Banana 2	image	1K 10 · 2K 14 · 4K 21	auto 1:1 2:3 3:2 3:4 4:3 4:5 5:4 9:16 16:9 21:9 1:4 4:1 1:8 8:1	up to 14	10–20 s
`nano-banana-2-lite` Nano Banana 2 Lite	image	6 credits / image	auto 1:1 2:3 3:2 3:4 4:3 4:5 5:4 9:16 16:9 21:9 1:4 4:1 1:8 8:1	up to 14	8–15 s

Model references

POSTSeedream 5.0 LiteText-to-image and reference-image editing with 2K, 3K and 4K output.6 credits POSTNano BananaFast text-to-image and image editing with strong character consistency.6 credits POSTNano Banana ProNative 2K with 4K output, precise typography and composition control.From 14 credits POSTNano Banana 2Multi-subject consistency and 1K / 2K / 4K output with extreme aspect ratios.From 10 credits POSTNano Banana 2 LiteBudget Nano Banana 2 at 1K.6 credits

Prices are credits per generated image and match the web generator. Resolution-priced models default to the cheapest tier when resolution is omitted.

curl https://flux1.ai/api/v1/models -H "Authorization: Bearer $FLUX1_API_KEY"

Response (abridged)

{
  "data": [
    {
      "id": "nano-banana-2",
      "label": "Nano Banana 2",
      "media_type": "image",
      "parameters": ["prompt", "images", "aspect_ratio", "resolution"],
      "pricing": { "type": "resolution", "credits": { "1K": 10, "2K": 14, "4K": 21 } },
      "constraints": { "aspect_ratios": ["auto", "1:1", …], "resolutions": ["1K", "2K", "4K"], "max_images": 14 },
      "estimated_seconds": [10, 20]
    },
    …
  ]
}

Reading a model entry

parameters lists the main request fields. parameter_details describes every accepted field with its type, default, allowed values and limits. example_input provides a starting point; spread it alongside model in the request body.
Seedream 5.0 Lite rejects unknown fields. Its output size is controlled by quality, not resolution. Nano Banana models ignore unknown fields.
pricing.type is fixed (one price) or resolution (a price per resolution value).
constraints carries allowed aspect_ratios, resolutions or qualities, output_formats and max_images as applicable. Invalid options are rejected with 400 invalid_request before any credits are charged. max_images limits reference images; one output is generated per request.
estimated_seconds is a typical range, not a guarantee; null means no measured range is published yet. Poll rather than sleep for a fixed time.

Video models are on the roadmap and will appear in this list with media_type: "video".

Model references

Reading a model entry

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