diff --git a/changelog.d/features/6653-deepinfra-video-provider.md b/changelog.d/features/6653-deepinfra-video-provider.md
new file mode 100644
index 0000000000..8957b95d28
--- /dev/null
+++ b/changelog.d/features/6653-deepinfra-video-provider.md
@@ -0,0 +1 @@
+- feat(sse): add DeepInfra as a video-generation provider via its native synchronous inference endpoint (#6653)
diff --git a/open-sse/config/videoRegistry.ts b/open-sse/config/videoRegistry.ts
index 843c3d9d88..7dcd906064 100644
--- a/open-sse/config/videoRegistry.ts
+++ b/open-sse/config/videoRegistry.ts
@@ -193,6 +193,23 @@ export const VIDEO_PROVIDERS: Record<string, VideoProvider> = {
     models: RUNWAYML_SUPPORTED_VIDEO_MODELS,
   },
 
+  deepinfra: {
+    id: "deepinfra",
+    // Native DeepInfra inference endpoint — same host/auth already proven for reranking
+    // (open-sse/config/rerankRegistry.ts). Reuses the stored deepinfra provider Bearer
+    // apiKey (already registered for chat) — no separate credential flow.
+    baseUrl: "https://api.deepinfra.com/v1/inference",
+    authType: "apikey",
+    authHeader: "bearer",
+    format: "deepinfra-video",
+    models: [
+      { id: "Wan-AI/Wan2.2-T2V-A14B", name: "Wan 2.2 T2V A14B" },
+      { id: "Wan-AI/Wan2.2-TI2V-5B", name: "Wan 2.2 TI2V 5B" },
+      { id: "Wan-AI/Wan2.7-T2V", name: "Wan 2.7 T2V" },
+      { id: "Lightricks/LTX-2.3-Distilled", name: "LTX 2.3 Distilled" },
+    ],
+  },
+
   alibaba: {
     id: "alibaba",
     alias: "ali",
diff --git a/open-sse/handlers/videoGeneration.ts b/open-sse/handlers/videoGeneration.ts
index b77f44c674..c9c0323607 100644
--- a/open-sse/handlers/videoGeneration.ts
+++ b/open-sse/handlers/videoGeneration.ts
@@ -11,6 +11,8 @@ import { getVideoProvider, parseVideoModel } from "../config/videoRegistry.ts";
 import { kieExecutor } from "../executors/kie.ts";
 import { vertexGenerateVideo } from "../executors/vertexMedia.ts";
 import { handleGoogleFlowVideoGeneration } from "./videoGeneration/googleFlowHandler.ts";
+import { handleDeepinfraVideoGeneration } from "./videoGeneration/deepinfraHandler.ts";
+import { handleLeonardoVideoGeneration } from "./videoGeneration/leonardoHandler.ts";
 import { handleDashscopeVideoGeneration } from "./videoGeneration/dashscopeHandler.ts";
 import { handleNovitaVideoGeneration } from "./videoGeneration/novitaHandler.ts";
 import { handleXaiVideoGeneration } from "./videoGeneration/xaiGrokImagineHandler.ts";
@@ -106,6 +108,17 @@ export async function handleVideoGeneration({ body, credentials, log }) {
     });
   }
 
+  if (providerConfig.format === "deepinfra-video") {
+    return handleDeepinfraVideoGeneration({
+      model,
+      provider,
+      providerConfig,
+      body,
+      credentials,
+      log,
+    });
+  }
+
   if (providerConfig.format === "dashscope-video") {
     return handleDashscopeVideoGeneration({
       model,
@@ -997,109 +1010,6 @@ async function handleHaiperVideoGeneration({
   return { success: false, status: 504, error: "Haiper video generation timed out" };
 }
 
-async function handleLeonardoVideoGeneration({
-  model,
-  provider,
-  providerConfig,
-  body,
-  credentials,
-  log,
-}) {
-  const startTime = Date.now();
-  const token = credentials?.apiKey || "";
-  const res = await fetch(providerConfig.baseUrl, {
-    method: "POST",
-    headers: { "Content-Type": "application/json", Authorization: `Bearer ${token}` },
-    body: JSON.stringify({
-      modelId: "phoenix",
-      prompt: body.prompt,
-      width: 1024,
-      height: 576,
-      num_frames: 24,
-    }),
-  });
-  if (!res.ok) {
-    const errorText = await res.text();
-    saveCallLog({
-      method: "POST",
-      path: "/v1/videos/generations",
-      status: res.status,
-      model: `${provider}/${model}`,
-      provider,
-      duration: Date.now() - startTime,
-      error: errorText.slice(0, 500),
-    }).catch(() => {});
-    return { success: false, status: res.status, error: errorText };
-  }
-  const { sdGenerationJob } = await res.json();
-  const genId = sdGenerationJob?.generationId;
-  if (!genId) {
-    saveCallLog({
-      method: "POST",
-      path: "/v1/videos/generations",
-      status: 502,
-      model: `${provider}/${model}`,
-      provider,
-      duration: Date.now() - startTime,
-      error: "No generation ID returned",
-    }).catch(() => {});
-    return { success: false, status: 502, error: "No generation ID returned" };
-  }
-  const deadline = Date.now() + 300000;
-  while (Date.now() < deadline) {
-    await sleep(5000);
-    const statusRes = await fetch(`${providerConfig.baseUrl}/${genId}`, {
-      headers: { Authorization: `Bearer ${token}` },
-    });
-    const status = await statusRes.json();
-    const gen = status.generations_by_pk || status;
-    if (gen.status === "COMPLETE") {
-      const imgUrl = gen.generated_images?.[0]?.url;
-      if (imgUrl) {
-        const videoRes = await fetch(imgUrl);
-        const buf = await videoRes.arrayBuffer();
-        saveCallLog({
-          method: "POST",
-          path: "/v1/videos/generations",
-          status: 200,
-          model: `${provider}/${model}`,
-          provider,
-          duration: Date.now() - startTime,
-        }).catch(() => {});
-        return {
-          success: true,
-          data: {
-            created: Math.floor(Date.now() / 1000),
-            data: [{ b64_json: Buffer.from(buf).toString("base64"), format: "mp4" }],
-          },
-        };
-      }
-    }
-    if (gen.status === "FAILED") {
-      saveCallLog({
-        method: "POST",
-        path: "/v1/videos/generations",
-        status: 502,
-        model: `${provider}/${model}`,
-        provider,
-        duration: Date.now() - startTime,
-        error: "Leonardo video generation failed",
-      }).catch(() => {});
-      return { success: false, status: 502, error: "Leonardo video generation failed" };
-    }
-  }
-  saveCallLog({
-    method: "POST",
-    path: "/v1/videos/generations",
-    status: 504,
-    model: `${provider}/${model}`,
-    provider,
-    duration: Date.now() - startTime,
-    error: "Leonardo video generation timed out",
-  }).catch(() => {});
-  return { success: false, status: 504, error: "Leonardo video generation timed out" };
-}
-
 function sleep(ms) {
   return new Promise((resolve) => setTimeout(resolve, ms));
 }
diff --git a/open-sse/handlers/videoGeneration/deepinfraHandler.ts b/open-sse/handlers/videoGeneration/deepinfraHandler.ts
new file mode 100644
index 0000000000..0312d6080c
--- /dev/null
+++ b/open-sse/handlers/videoGeneration/deepinfraHandler.ts
@@ -0,0 +1,186 @@
+/**
+ * DeepInfra native text/image-to-video generation.
+ *
+ * DeepInfra's `/v1/inference/{model}` endpoint is already proven in this codebase for
+ * reranking (`open-sse/handlers/rerank.ts` + `open-sse/config/rerankRegistry.ts`) — same
+ * host, same Bearer auth, same non-OpenAI response shape. This reuses the stored
+ * `deepinfra` provider credential (already registered for chat) — no new credential flow.
+ *
+ * Confirmed against DeepInfra's own docs (https://deepinfra.com/<model>/api): the call is
+ * synchronous — `POST {prompt}` returns `{video_url, seed, request_id, inference_status}`
+ * directly, no task/poll loop like `kie-video`/`dashscope-video`.
+ */
+
+import { sanitizeErrorMessage } from "../../utils/error.ts";
+import { saveCallLog } from "@/lib/usageDb";
+
+interface DeepinfraHandlerArgs {
+  model: string;
+  provider: string;
+  providerConfig: { baseUrl: string };
+  body: Record<string, unknown> & {
+    prompt?: unknown;
+    negative_prompt?: unknown;
+    image?: unknown;
+    image_url?: unknown;
+    seed?: unknown;
+  };
+  credentials?: { apiKey?: string; accessToken?: string } | null;
+  log?: {
+    info?: (scope: string, message: string) => void;
+    error?: (scope: string, message: string) => void;
+  } | null;
+}
+
+interface DeepinfraVideoResponse {
+  video_url?: unknown;
+  seed?: unknown;
+  request_id?: unknown;
+  inference_status?: { status?: unknown; error?: unknown } | null;
+}
+
+function isRecord(value: unknown): value is Record<string, unknown> {
+  return typeof value === "object" && value !== null;
+}
+
+/** Builds the DeepInfra `/v1/inference/{model}` request body from the OmniRoute video body. */
+/* @testonly */ export function buildDeepinfraVideoRequestBody(
+  body: DeepinfraHandlerArgs["body"]
+): Record<string, unknown> {
+  const payload: Record<string, unknown> = {
+    prompt: typeof body.prompt === "string" ? body.prompt : String(body.prompt ?? ""),
+  };
+  if (typeof body.negative_prompt === "string" && body.negative_prompt) {
+    payload.negative_prompt = body.negative_prompt;
+  }
+  const image = body.image ?? body.image_url;
+  if (typeof image === "string" && image) {
+    payload.image = image;
+  }
+  if (typeof body.seed === "number" && Number.isFinite(body.seed)) {
+    payload.seed = body.seed;
+  }
+  return payload;
+}
+
+/** Extracts a human-readable error message from a DeepInfra error/inference_status payload. */
+/* @testonly */ export function extractDeepinfraErrorMessage(data: unknown): string | null {
+  if (!isRecord(data)) return null;
+  const direct = data.error ?? data.detail ?? data.message;
+  if (typeof direct === "string" && direct) return direct;
+  if (isRecord(direct) && typeof direct.message === "string" && direct.message) {
+    return direct.message;
+  }
+  const status = data.inference_status;
+  if (isRecord(status) && typeof status.error === "string" && status.error) {
+    return status.error;
+  }
+  return null;
+}
+
+interface CallLogContext {
+  provider: string;
+  model: string;
+  startTime: number;
+}
+
+function logDeepinfraCall(
+  ctx: CallLogContext,
+  status: number,
+  extra: { error?: string; responseBody?: Record<string, unknown> }
+) {
+  saveCallLog({
+    method: "POST",
+    path: "/v1/videos/generations",
+    status,
+    model: `${ctx.provider}/${ctx.model}`,
+    provider: ctx.provider,
+    duration: Date.now() - ctx.startTime,
+    ...extra,
+  }).catch(() => {});
+}
+
+function buildDeepinfraFetchError(
+  ctx: CallLogContext,
+  status: number,
+  data: unknown,
+  log?: DeepinfraHandlerArgs["log"]
+) {
+  const errorMessage = extractDeepinfraErrorMessage(data) || `DeepInfra returned HTTP ${status}`;
+  log?.error?.("VIDEO", `${ctx.provider} deepinfra-video error ${status}: ${errorMessage}`);
+  logDeepinfraCall(ctx, status, { error: errorMessage.slice(0, 500) });
+  return { success: false, status, error: errorMessage };
+}
+
+function buildDeepinfraSuccess(ctx: CallLogContext, videoUrl: string) {
+  logDeepinfraCall(ctx, 200, { responseBody: { videos_count: 1 } });
+  return {
+    success: true,
+    data: {
+      created: Math.floor(Date.now() / 1000),
+      data: [{ url: videoUrl, format: "mp4" }],
+    },
+  };
+}
+
+function buildDeepinfraCatchError(
+  ctx: CallLogContext,
+  err: unknown,
+  log?: DeepinfraHandlerArgs["log"]
+) {
+  const errorMessage = sanitizeErrorMessage(err) || "Video provider error";
+  log?.error?.("VIDEO", `${ctx.provider} deepinfra-video error: ${errorMessage}`);
+  logDeepinfraCall(ctx, 502, { error: errorMessage });
+  return { success: false, status: 502, error: errorMessage };
+}
+
+async function fetchDeepinfraVideo(
+  baseUrl: string,
+  model: string,
+  token: string,
+  requestBody: unknown
+) {
+  const res = await fetch(`${baseUrl}/${model}`, {
+    method: "POST",
+    headers: { Authorization: `Bearer ${token}`, "Content-Type": "application/json" },
+    body: JSON.stringify(requestBody),
+  });
+  const data: DeepinfraVideoResponse = await res.json().catch(() => ({}));
+  return { res, data };
+}
+
+export async function handleDeepinfraVideoGeneration({
+  model,
+  provider,
+  providerConfig,
+  body,
+  credentials,
+  log,
+}: DeepinfraHandlerArgs) {
+  const ctx: CallLogContext = { provider, model, startTime: Date.now() };
+  const token = credentials?.apiKey || credentials?.accessToken;
+  if (!token) {
+    return { success: false, status: 401, error: "DeepInfra API key is required" };
+  }
+
+  const baseUrl = providerConfig.baseUrl.replace(/\/$/, "");
+  const requestBody = buildDeepinfraVideoRequestBody(body);
+  const promptPreview = String(body.prompt ?? "").slice(0, 60);
+  log?.info?.("VIDEO", `${provider}/${model} (deepinfra-video) | prompt: "${promptPreview}..."`);
+
+  try {
+    const { res, data } = await fetchDeepinfraVideo(baseUrl, model, token, requestBody);
+    if (!res.ok) return buildDeepinfraFetchError(ctx, res.status, data, log);
+
+    const videoUrl = typeof data.video_url === "string" ? data.video_url : null;
+    if (!videoUrl) {
+      const errorMessage =
+        extractDeepinfraErrorMessage(data) || "DeepInfra video generation did not return video_url";
+      return { success: false, status: 502, error: errorMessage };
+    }
+
+    return buildDeepinfraSuccess(ctx, videoUrl);
+  } catch (err: unknown) {
+    return buildDeepinfraCatchError(ctx, err, log);
+  }
+}
diff --git a/open-sse/handlers/videoGeneration/leonardoHandler.ts b/open-sse/handlers/videoGeneration/leonardoHandler.ts
new file mode 100644
index 0000000000..c583e4194b
--- /dev/null
+++ b/open-sse/handlers/videoGeneration/leonardoHandler.ts
@@ -0,0 +1,116 @@
+/**
+ * Leonardo AI (Phoenix) video generation: submit → poll → fetch output.
+ *
+ * Extracted out of the frozen `videoGeneration.ts` god-file (unchanged behavior) to make
+ * room for the new DeepInfra video adapter without pushing the file-size ratchet over its
+ * baseline — mirrors the existing `googleFlowHandler.ts` extraction.
+ */
+
+import { saveCallLog } from "@/lib/usageDb";
+
+function sleep(ms: number) {
+  return new Promise((resolve) => setTimeout(resolve, ms));
+}
+
+export async function handleLeonardoVideoGeneration({
+  model,
+  provider,
+  providerConfig,
+  body,
+  credentials,
+  log,
+}) {
+  const startTime = Date.now();
+  const token = credentials?.apiKey || "";
+  const res = await fetch(providerConfig.baseUrl, {
+    method: "POST",
+    headers: { "Content-Type": "application/json", Authorization: `Bearer ${token}` },
+    body: JSON.stringify({
+      modelId: "phoenix",
+      prompt: body.prompt,
+      width: 1024,
+      height: 576,
+      num_frames: 24,
+    }),
+  });
+  if (!res.ok) {
+    const errorText = await res.text();
+    saveCallLog({
+      method: "POST",
+      path: "/v1/videos/generations",
+      status: res.status,
+      model: `${provider}/${model}`,
+      provider,
+      duration: Date.now() - startTime,
+      error: errorText.slice(0, 500),
+    }).catch(() => {});
+    return { success: false, status: res.status, error: errorText };
+  }
+  const { sdGenerationJob } = await res.json();
+  const genId = sdGenerationJob?.generationId;
+  if (!genId) {
+    saveCallLog({
+      method: "POST",
+      path: "/v1/videos/generations",
+      status: 502,
+      model: `${provider}/${model}`,
+      provider,
+      duration: Date.now() - startTime,
+      error: "No generation ID returned",
+    }).catch(() => {});
+    return { success: false, status: 502, error: "No generation ID returned" };
+  }
+  const deadline = Date.now() + 300000;
+  while (Date.now() < deadline) {
+    await sleep(5000);
+    const statusRes = await fetch(`${providerConfig.baseUrl}/${genId}`, {
+      headers: { Authorization: `Bearer ${token}` },
+    });
+    const status = await statusRes.json();
+    const gen = status.generations_by_pk || status;
+    if (gen.status === "COMPLETE") {
+      const imgUrl = gen.generated_images?.[0]?.url;
+      if (imgUrl) {
+        const videoRes = await fetch(imgUrl);
+        const buf = await videoRes.arrayBuffer();
+        saveCallLog({
+          method: "POST",
+          path: "/v1/videos/generations",
+          status: 200,
+          model: `${provider}/${model}`,
+          provider,
+          duration: Date.now() - startTime,
+        }).catch(() => {});
+        return {
+          success: true,
+          data: {
+            created: Math.floor(Date.now() / 1000),
+            data: [{ b64_json: Buffer.from(buf).toString("base64"), format: "mp4" }],
+          },
+        };
+      }
+    }
+    if (gen.status === "FAILED") {
+      saveCallLog({
+        method: "POST",
+        path: "/v1/videos/generations",
+        status: 502,
+        model: `${provider}/${model}`,
+        provider,
+        duration: Date.now() - startTime,
+        error: "Leonardo video generation failed",
+      }).catch(() => {});
+      return { success: false, status: 502, error: "Leonardo video generation failed" };
+    }
+  }
+  saveCallLog({
+    method: "POST",
+    path: "/v1/videos/generations",
+    status: 504,
+    model: `${provider}/${model}`,
+    provider,
+    duration: Date.now() - startTime,
+    error: "Leonardo video generation timed out",
+  }).catch(() => {});
+  return { success: false, status: 504, error: "Leonardo video generation timed out" };
+}
diff --git a/tests/unit/video-deepinfra-6653.test.ts b/tests/unit/video-deepinfra-6653.test.ts
new file mode 100644
index 0000000000..63ea3e4e4e
--- /dev/null
+++ b/tests/unit/video-deepinfra-6653.test.ts
@@ -0,0 +1,196 @@
+import test from "node:test";
+import assert from "node:assert/strict";
+import { mkdtempSync } from "node:fs";
+import { tmpdir } from "node:os";
+import { join } from "node:path";
+
+process.env.DATA_DIR = mkdtempSync(join(tmpdir(), "omniroute-video-deepinfra-"));
+
+const { handleVideoGeneration } = await import("../../open-sse/handlers/videoGeneration.ts");
+const { VIDEO_PROVIDERS, parseVideoModel } = await import(
+  "../../open-sse/config/videoRegistry.ts"
+);
+const {
+  buildDeepinfraVideoRequestBody,
+  extractDeepinfraErrorMessage,
+} = await import("../../open-sse/handlers/videoGeneration/deepinfraHandler.ts");
+
+const INFERENCE_URL = "https://api.deepinfra.com/v1/inference/Wan-AI/Wan2.2-T2V-A14B";
+
+function jsonResponse(body, status = 200) {
+  return new Response(JSON.stringify(body), {
+    status,
+    headers: { "content-type": "application/json" },
+  });
+}
+
+test("VIDEO_PROVIDERS exposes the deepinfra deepinfra-video entry", () => {
+  assert.ok(VIDEO_PROVIDERS.deepinfra, "deepinfra video provider is registered");
+  assert.equal(VIDEO_PROVIDERS.deepinfra.format, "deepinfra-video");
+  assert.equal(VIDEO_PROVIDERS.deepinfra.authType, "apikey");
+  assert.equal(VIDEO_PROVIDERS.deepinfra.authHeader, "bearer");
+  assert.equal(VIDEO_PROVIDERS.deepinfra.baseUrl, "https://api.deepinfra.com/v1/inference");
+  assert.ok(
+    VIDEO_PROVIDERS.deepinfra.models.some((m) => m.id === "Wan-AI/Wan2.2-T2V-A14B"),
+    "Wan 2.2 T2V A14B is listed"
+  );
+});
+
+test("parseVideoModel resolves provider/model strings whose model id itself contains a slash", () => {
+  const parsed = parseVideoModel("deepinfra/Wan-AI/Wan2.2-T2V-A14B");
+  assert.equal(parsed.provider, "deepinfra");
+  assert.equal(parsed.model, "Wan-AI/Wan2.2-T2V-A14B");
+});
+
+test("buildDeepinfraVideoRequestBody carries prompt/negative_prompt/image/seed", () => {
+  const body = buildDeepinfraVideoRequestBody({
+    prompt: "a neon city in the rain",
+    negative_prompt: "blurry",
+    image: "https://example.com/frame.png",
+    seed: 42,
+  });
+  assert.deepEqual(body, {
+    prompt: "a neon city in the rain",
+    negative_prompt: "blurry",
+    image: "https://example.com/frame.png",
+    seed: 42,
+  });
+});
+
+test("buildDeepinfraVideoRequestBody omits optional fields when absent", () => {
+  const body = buildDeepinfraVideoRequestBody({ prompt: "just a prompt" });
+  assert.deepEqual(body, { prompt: "just a prompt" });
+});
+
+test("extractDeepinfraErrorMessage reads string error/detail/message and inference_status.error", () => {
+  assert.equal(extractDeepinfraErrorMessage({ error: "bad request" }), "bad request");
+  assert.equal(extractDeepinfraErrorMessage({ detail: "invalid model" }), "invalid model");
+  assert.equal(
+    extractDeepinfraErrorMessage({ error: { message: "nested" } }),
+    "nested"
+  );
+  assert.equal(
+    extractDeepinfraErrorMessage({ inference_status: { error: "queue timeout" } }),
+    "queue timeout"
+  );
+  assert.equal(extractDeepinfraErrorMessage({}), null);
+  assert.equal(extractDeepinfraErrorMessage(null), null);
+});
+
+test("handleVideoGeneration builds a synchronous DeepInfra request and returns the mp4 url", async () => {
+  const originalFetch = globalThis.fetch;
+  let capturedRequest;
+
+  globalThis.fetch = async (url, options = {}) => {
+    capturedRequest = {
+      url: String(url),
+      headers: options.headers,
+      body: JSON.parse(String(options.body || "{}")),
+    };
+    return jsonResponse({
+      video_url: "https://deepinfra-cdn.example.com/wan-out.mp4",
+      seed: 7,
+      request_id: "req-1",
+      inference_status: { status: "succeeded" },
+    });
+  };
+
+  try {
+    const result = await handleVideoGeneration({
+      body: {
+        model: "deepinfra/Wan-AI/Wan2.2-T2V-A14B",
+        prompt: "a neon city in the rain",
+        negative_prompt: "blurry",
+      },
+      credentials: { apiKey: "deepinfra-key" },
+      log: null,
+    });
+
+    assert.equal(capturedRequest.url, INFERENCE_URL);
+    assert.equal(capturedRequest.headers["Authorization"], "Bearer deepinfra-key");
+    assert.equal(capturedRequest.body.prompt, "a neon city in the rain");
+    assert.equal(capturedRequest.body.negative_prompt, "blurry");
+
+    assert.equal(result.success, true);
+    assert.equal(result.data.data[0].url, "https://deepinfra-cdn.example.com/wan-out.mp4");
+    assert.equal(result.data.data[0].format, "mp4");
+  } finally {
+    globalThis.fetch = originalFetch;
+  }
+});
+
+test("handleVideoGeneration rejects DeepInfra video requests without credentials", async () => {
+  const result = await handleVideoGeneration({
+    body: { model: "deepinfra/Wan-AI/Wan2.2-T2V-A14B", prompt: "x" },
+    credentials: null,
+    log: null,
+  });
+
+  assert.equal(result.success, false);
+  assert.equal(result.status, 401);
+  assert.match(result.error, /DeepInfra API key is required/);
+});
+
+test("handleVideoGeneration surfaces upstream HTTP errors without leaking a stack trace", async () => {
+  const originalFetch = globalThis.fetch;
+  globalThis.fetch = async () =>
+    jsonResponse({ error: "Invalid API key" }, 401);
+
+  try {
+    const result = await handleVideoGeneration({
+      body: { model: "deepinfra/Wan-AI/Wan2.2-T2V-A14B", prompt: "x" },
+      credentials: { apiKey: "bad-key" },
+      log: null,
+    });
+
+    assert.equal(result.success, false);
+    assert.equal(result.status, 401);
+    assert.equal(result.error, "Invalid API key");
+    assert.ok(!result.error.includes("at /"), "error must not leak a stack trace");
+  } finally {
+    globalThis.fetch = originalFetch;
+  }
+});
+
+test("handleVideoGeneration returns 502 when DeepInfra succeeds without a video_url", async () => {
+  const originalFetch = globalThis.fetch;
+  globalThis.fetch = async () => jsonResponse({ seed: 1, request_id: "req-2" });
+
+  try {
+    const result = await handleVideoGeneration({
+      body: { model: "deepinfra/Wan-AI/Wan2.2-T2V-A14B", prompt: "x" },
+      credentials: { apiKey: "deepinfra-key" },
+      log: null,
+    });
+
+    assert.equal(result.success, false);
+    assert.equal(result.status, 502);
+    assert.match(result.error, /did not return video_url/);
+  } finally {
+    globalThis.fetch = originalFetch;
+  }
+});
+
+test("handleVideoGeneration sanitizes network-level failures via sanitizeErrorMessage", async () => {
+  const originalFetch = globalThis.fetch;
+  globalThis.fetch = async () => {
+    throw new Error(
+      "fetch failed\n    at Object.fetch (/home/user/omniroute/node_modules/undici/lib/x.js:1:1)"
+    );
+  };
+
+  try {
+    const result = await handleVideoGeneration({
+      body: { model: "deepinfra/Wan-AI/Wan2.2-T2V-A14B", prompt: "x" },
+      credentials: { apiKey: "deepinfra-key" },
+      log: null,
+    });
+
+    assert.equal(result.success, false);
+    assert.equal(result.status, 502);
+    assert.ok(!result.error.includes("at Object.fetch"), "error must not leak a stack trace");
+    assert.ok(!result.error.includes("/home/user"), "error must not leak an absolute path");
+  } finally {
+    globalThis.fetch = originalFetch;
+  }
+});