fix(video): correct seedance 2.0 mini 480p pricing

Seedance 2.0 Mini natively supports 480p and 720p, and 480p costs half
the 720p rate (3 vs 6 credits/sec). Add explicit 480p_ perSecondPrice
keys at $0.0378/s and route 480p requests to the upstream resolution=480p
instead of silently upscaling them to 720p. Verified end-to-end: an
848x480 request now returns a genuine ~480p clip (was 1280x720).

Also split the Mini docs rows to reflect its real 480p/720p sizes and
4-15s durations.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: steebchen

apps/docs/content/features/video-generation.mdx

@@ -13,7 +13,8 @@ LLMGateway supports asynchronous video generation through an OpenAI-compatible `
 Currently available models:
 
 - **Veo 3.1** through `avalanche` (1080p, 4k) and `google-vertex` (720p, 1080p, 4k)
-- **Seedance 2.0**, **Seedance 2.0 Fast**, **Seedance 2.0 Mini**, and **Seedance 1.5 Pro** through `bytedance` (720p, 1080p)
+- **Seedance 2.0**, **Seedance 2.0 Fast**, and **Seedance 1.5 Pro** through `bytedance` (720p, 1080p)
+- **Seedance 2.0 Mini** through `bytedance` (480p, 720p)
 - **KLING v3.0** and **KLING v3.0 Turbo** through `atlascloud` (720p, 1080p; KLING v3.0 also 4k)
 
 You can find the current list of video-capable models on our [models page with the video filter enabled](https://llmgateway.io/models?filters=1&videoGeneration=true) or programmatically through the [/v1/models endpoint](/v1_models).
@@ -49,13 +50,14 @@ LLMGateway currently supports a focused subset of the OpenAI video API.
 
 ### Sizes and durations by model
 
-| Model family                                 | Provider        | Supported sizes                                                            | Supported durations |
-| -------------------------------------------- | --------------- | -------------------------------------------------------------------------- | ------------------- |
-| Veo 3.1                                      | `google-vertex` | `1280x720`, `720x1280`, `1920x1080`, `1080x1920`, `3840x2160`, `2160x3840` | `4`, `6`, `8`, `10` |
-| Veo 3.1                                      | `avalanche`     | `1920x1080`, `1080x1920`, `3840x2160`, `2160x3840`                         | `8`                 |
-| Seedance 2.0 / 2.0 Fast / 2.0 Mini / 1.5 Pro | `bytedance`     | `1280x720`, `720x1280`, `1920x1080`, `1080x1920`                           | `5`, `10`           |
-| KLING v3.0                                   | `atlascloud`    | `1280x720`, `720x1280`, `1920x1080`, `1080x1920`, `3840x2160`, `2160x3840` | `5`, `10`           |
-| KLING v3.0 Turbo                             | `atlascloud`    | `1280x720`, `720x1280`, `1920x1080`, `1080x1920`                           | `5`, `10`           |
+| Model family                      | Provider        | Supported sizes                                                            | Supported durations |
+| --------------------------------- | --------------- | -------------------------------------------------------------------------- | ------------------- |
+| Veo 3.1                           | `google-vertex` | `1280x720`, `720x1280`, `1920x1080`, `1080x1920`, `3840x2160`, `2160x3840` | `4`, `6`, `8`, `10` |
+| Veo 3.1                           | `avalanche`     | `1920x1080`, `1080x1920`, `3840x2160`, `2160x3840`                         | `8`                 |
+| Seedance 2.0 / 2.0 Fast / 1.5 Pro | `bytedance`     | `1280x720`, `720x1280`, `1920x1080`, `1080x1920`                           | `5`, `10`           |
+| Seedance 2.0 Mini                 | `bytedance`     | `1280x720`, `720x1280`, `848x480`, `854x480`, `480x854`                    | `4`–`15`            |
+| KLING v3.0                        | `atlascloud`    | `1280x720`, `720x1280`, `1920x1080`, `1080x1920`, `3840x2160`, `2160x3840` | `5`, `10`           |
+| KLING v3.0 Turbo                  | `atlascloud`    | `1280x720`, `720x1280`, `1920x1080`, `1080x1920`                           | `5`, `10`           |
 
 Requests return `400` when the selected provider cannot serve the requested `size` or `seconds`. Seedance and KLING v3.0 derive `aspect_ratio` from the requested `size` (16:9 for landscape, 9:16 for portrait).
 
@@ -225,7 +227,7 @@ Seedance (ByteDance):
 | `seedance-2-0`      | `bytedance` | 1080p      | `$0.3402 / second`  | `$0.3402 / second`  |
 | `seedance-2-0-fast` | `bytedance` | 720p       | `$0.121 / second`   | `$0.121 / second`   |
 | `seedance-2-0-fast` | `bytedance` | 1080p      | `$0.2722 / second`  | `$0.2722 / second`  |
-| `seedance-2-0-mini` | `bytedance` | 480p       | `$0.0756 / second`  | `$0.0756 / second`  |
+| `seedance-2-0-mini` | `bytedance` | 480p       | `$0.0378 / second`  | `$0.0378 / second`  |
 | `seedance-2-0-mini` | `bytedance` | 720p       | `$0.0756 / second`  | `$0.0756 / second`  |
 | `seedance-1-5-pro`  | `bytedance` | 720p       | `$0.05184 / second` | `$0.02592 / second` |
 | `seedance-1-5-pro`  | `bytedance` | 1080p      | `$0.1166 / second`  | `$0.05832 / second` |

apps/gateway/src/videos/videos.ts

@@ -3554,7 +3554,11 @@ async function createBytedanceVideoJob(
 
 	if (isDreaminaModel) {
 		upstreamRequest.resolution =
-			videoSize.resolution === "1080p" ? "1080p" : "720p";
+			videoSize.resolution === "1080p"
+				? "1080p"
+				: videoSize.resolution === "480p"
+					? "480p"
+					: "720p";
 	}
 
 	const upstreamUrl = joinUrl(

packages/models/src/models/bytedance.ts

@@ -218,6 +218,8 @@ export const bytedanceModels = [
 				perSecondPrice: {
 					default_audio: "0.0756",
 					default_video: "0.0756",
+					"480p_audio": "0.0378",
+					"480p_video": "0.0378",
 				},
 				contextSize: 2000,
 				maxOutput: 1,