diff --git a/changelog.d/fixes/8250-kimi-k3-vision-capability.md b/changelog.d/fixes/8250-kimi-k3-vision-capability.md
new file mode 100644
index 0000000000..af34851725
--- /dev/null
+++ b/changelog.d/fixes/8250-kimi-k3-vision-capability.md
@@ -0,0 +1 @@
+- **fix(providers):** reconcile Kimi K3 vision metadata when synced `attachment=false` contradicts image/video `modalities_input`, so `supportsVision`, `attachment`, and exposed modalities agree ([#8250](https://github.com/diegosouzapw/OmniRoute/issues/8250)) — thanks @Prudhvivuda
diff --git a/open-sse/config/providers/registry/kimi/coding/index.ts b/open-sse/config/providers/registry/kimi/coding/index.ts
index e866a02923..6b2471f435 100644
--- a/open-sse/config/providers/registry/kimi/coding/index.ts
+++ b/open-sse/config/providers/registry/kimi/coding/index.ts
@@ -9,6 +9,11 @@ export const KIMI_CODING_MODELS: RegistryModel[] = [
     name: "Kimi K3",
     contextLength: 1048576,
     supportsReasoning: true,
+    // NOTE: supportsVision intentionally left unset here — this static/stable
+    // fallback catalog must stay text-only per #4071. The Kimi K3 vision
+    // capability is applied on the discovered path via MODEL_SPECS["kimi-k3"]
+    // (aliases: ["k3"]) and modelCapabilities.ts::resolveVisionCapability
+    // (#8250), not on this registry fallback entry.
   },
   {
     id: "kimi-for-coding",
diff --git a/src/lib/modelCapabilities.ts b/src/lib/modelCapabilities.ts
index 546ee2051c..79a1a75f2d 100644
--- a/src/lib/modelCapabilities.ts
+++ b/src/lib/modelCapabilities.ts
@@ -366,6 +366,14 @@ function isKnownTextOnlyDespiteSync(modelId: string | null | undefined): boolean
   return KNOWN_TEXT_ONLY_DESPITE_SYNC.some((pattern) => pattern.test(id));
 }
 
+/** True when a modality list declares image and/or video input/output. */
+function modalitiesDeclareVision(modalities: readonly string[]): boolean {
+  return modalities.some((entry) => {
+    const lower = String(entry).toLowerCase();
+    return lower.includes("image") || lower.includes("video");
+  });
+}
+
 function resolveVisionCapability(
   spec: ModelSpec | undefined,
   registryModel: { supportsVision?: boolean } | null,
@@ -384,6 +392,13 @@ function resolveVisionCapability(
   if (isKnownTextOnlyDespiteSync(modelId)) return false;
 
   if (typeof synced?.attachment === "boolean") {
+    // #8250: models.dev sometimes ships attachment=false alongside image/video
+    // modalities (observed for Kimi K3). Prefer the richer modality signal over
+    // the contradictory false flag so supportsVision / attachment / modalities
+    // can be reconciled to a single vision-capable verdict.
+    if (synced.attachment === false && modalitiesDeclareVision(allModalities)) {
+      return true;
+    }
     return synced.attachment;
   }
 
@@ -507,6 +522,22 @@ export function getResolvedModelCapabilities(input: CapabilityInput): ResolvedMo
 
   const maxTokenOverride = getMaxTokenCapabilityOverride(resolved);
 
+  const supportsVision = resolveVisionCapability(
+    spec,
+    registryModel,
+    synced,
+    modalitiesInput,
+    modalitiesOutput,
+    lookupKey
+  );
+
+  // #8250: when resolve promoted vision over a contradictory attachment=false,
+  // expose attachment=true so catalog / Vision Bridge / clients see one verdict.
+  let attachment = synced?.attachment ?? null;
+  if (supportsVision === true && attachment === false) {
+    attachment = true;
+  }
+
   return {
     provider: resolved.provider,
     model: resolved.model,
@@ -515,16 +546,9 @@ export function getResolvedModelCapabilities(input: CapabilityInput): ResolvedMo
     reasoning: supportsThinking ?? heuristicReasoning(lookupKey),
     supportsThinking,
     supportsTools,
-    supportsVision: resolveVisionCapability(
-      spec,
-      registryModel,
-      synced,
-      modalitiesInput,
-      modalitiesOutput,
-      lookupKey
-    ),
+    supportsVision,
     supportsMaxTokens: heuristicMaxTokens(lookupKey),
-    attachment: synced?.attachment ?? null,
+    attachment,
     structuredOutput: synced?.structured_output ?? null,
     temperature: synced?.temperature ?? null,
     contextWindow,
diff --git a/src/lib/modelsDevSync/transform.ts b/src/lib/modelsDevSync/transform.ts
index 77d20ac46e..dffce5bd33 100644
--- a/src/lib/modelsDevSync/transform.ts
+++ b/src/lib/modelsDevSync/transform.ts
@@ -243,14 +243,30 @@ export function transformModelsDevToCapabilities(raw: ModelsDevData): Capabiliti
     const omniRouteProviders = mapProviderId(providerId);
 
     for (const [modelId, model] of Object.entries(providerData.models || {})) {
+      const modalitiesInput = model.modalities?.input ?? [];
+      const modalitiesOutput = model.modalities?.output ?? [];
+      // #8250: models.dev can ship attachment=false while modalities.input still
+      // lists image/video (Kimi K3). Normalize at sync so persisted rows stay
+      // internally consistent before resolve-time reconciliation.
+      let attachment = model.attachment ?? null;
+      if (
+        attachment === false &&
+        [...modalitiesInput, ...modalitiesOutput].some((entry) => {
+          const lower = String(entry).toLowerCase();
+          return lower.includes("image") || lower.includes("video");
+        })
+      ) {
+        attachment = true;
+      }
+
       const cap: ModelCapabilityEntry = {
         tool_call: model.tool_call ?? null,
         reasoning: model.reasoning ?? null,
-        attachment: model.attachment ?? null,
+        attachment,
         structured_output: model.structured_output ?? null,
         temperature: model.temperature ?? null,
-        modalities_input: JSON.stringify(model.modalities?.input ?? []),
-        modalities_output: JSON.stringify(model.modalities?.output ?? []),
+        modalities_input: JSON.stringify(modalitiesInput),
+        modalities_output: JSON.stringify(modalitiesOutput),
         knowledge_cutoff: model.knowledge ?? null,
         release_date: model.release_date ?? null,
         last_updated: model.last_updated ?? null,
diff --git a/src/shared/constants/modelSpecs.ts b/src/shared/constants/modelSpecs.ts
index 48bdb3392f..c4703a30be 100644
--- a/src/shared/constants/modelSpecs.ts
+++ b/src/shared/constants/modelSpecs.ts
@@ -374,6 +374,7 @@ export const MODEL_SPECS: Record<string, ModelSpec> = {
   },
 
   // ── Kimi K3 (Moonshot API — 1M context/output, native vision) ────
+  // `k3` is the Kimi Coding / kimi-coding-apikey wire id (#8250).
   "kimi-k3": {
     maxOutputTokens: 1048576,
     contextWindow: 1048576,
@@ -381,6 +382,7 @@ export const MODEL_SPECS: Record<string, ModelSpec> = {
     supportsThinking: true,
     supportsTools: true,
     supportsVision: true,
+    aliases: ["k3"],
   },
 
   // ── Kimi K2.6 (Moonshot API — 262K native) ──────────────────────
diff --git a/tests/unit/model-capabilities-kimi-k3-vision-8250.test.ts b/tests/unit/model-capabilities-kimi-k3-vision-8250.test.ts
new file mode 100644
index 0000000000..4e4175c476
--- /dev/null
+++ b/tests/unit/model-capabilities-kimi-k3-vision-8250.test.ts
@@ -0,0 +1,214 @@
+/**
+ * #8250 — Kimi K3 synced capability rows can contradict themselves:
+ *   attachment=false  AND  modalities_input includes image/video
+ *
+ * `resolveVisionCapability` used to prefer the boolean `attachment` flag, so K3
+ * resolved as non-vision while `/v1/models` and clients still saw image/video
+ * input modalities. Vision Bridge, combo compatibility, and the catalog then
+ * disagreed.
+ *
+ * Authoritative truth for Kimi K3 is vision-capable (Moonshot native vision;
+ * `MODEL_SPECS["kimi-k3"].supportsVision === true`). Contradictory synced rows
+ * must be reconciled so `attachment`, `supportsVision`, and exposed
+ * `modalitiesInput` agree — both for already-persisted DB rows and at models.dev
+ * transform/sync time.
+ */
+import test from "node:test";
+import assert from "node:assert/strict";
+import fs from "node:fs";
+import os from "node:os";
+import path from "node:path";
+
+const TEST_DATA_DIR = fs.mkdtempSync(path.join(os.tmpdir(), "omniroute-kimi-k3-vision-8250-"));
+process.env.DATA_DIR = TEST_DATA_DIR;
+
+const core = await import("../../src/lib/db/core.ts");
+const modelsDevSync = await import("../../src/lib/modelsDevSync.ts");
+const { transformModelsDevToCapabilities } =
+  await import("../../src/lib/modelsDevSync/transform.ts");
+const modelCapabilities = await import("../../src/lib/modelCapabilities.ts");
+
+function buildCapability(overrides = {}) {
+  return {
+    tool_call: null,
+    reasoning: null,
+    attachment: null,
+    structured_output: null,
+    temperature: null,
+    modalities_input: "[]",
+    modalities_output: "[]",
+    knowledge_cutoff: null,
+    release_date: null,
+    last_updated: null,
+    status: null,
+    family: null,
+    open_weights: null,
+    limit_context: null,
+    limit_input: null,
+    limit_output: null,
+    interleaved_field: null,
+    ...overrides,
+  };
+}
+
+function resetStorage() {
+  core.resetDbInstance();
+  fs.rmSync(TEST_DATA_DIR, { recursive: true, force: true });
+  fs.mkdirSync(TEST_DATA_DIR, { recursive: true });
+}
+
+/** Mirrors the contradictory deployed row reported in #8250. */
+function seedContradictoryK3Capabilities() {
+  modelsDevSync.saveModelsDevCapabilities({
+    "kimi-coding-apikey": {
+      k3: buildCapability({
+        attachment: false,
+        modalities_input: JSON.stringify(["text", "image", "video"]),
+        modalities_output: JSON.stringify(["text"]),
+        reasoning: true,
+        tool_call: true,
+        limit_context: 1048576,
+        status: "stable",
+      }),
+    },
+    "kimi-coding": {
+      k3: buildCapability({
+        attachment: false,
+        modalities_input: JSON.stringify(["text", "image", "video"]),
+        modalities_output: JSON.stringify(["text"]),
+        reasoning: true,
+        tool_call: true,
+        limit_context: 1048576,
+        status: "stable",
+      }),
+    },
+    kmc: {
+      k3: buildCapability({
+        attachment: false,
+        modalities_input: JSON.stringify(["text", "image", "video"]),
+        modalities_output: JSON.stringify(["text"]),
+        reasoning: true,
+        tool_call: true,
+        limit_context: 1048576,
+        status: "stable",
+      }),
+    },
+    kmca: {
+      k3: buildCapability({
+        attachment: false,
+        modalities_input: JSON.stringify(["text", "image", "video"]),
+        modalities_output: JSON.stringify(["text"]),
+        reasoning: true,
+        tool_call: true,
+        limit_context: 1048576,
+        status: "stable",
+      }),
+    },
+  });
+}
+
+test.beforeEach(() => {
+  resetStorage();
+});
+
+test.after(() => {
+  core.resetDbInstance();
+  fs.rmSync(TEST_DATA_DIR, { recursive: true, force: true });
+});
+
+test("#8250 kimi-coding-apikey/k3: attachment=false + image modalities → vision=true and fields agree", () => {
+  seedContradictoryK3Capabilities();
+  const caps = modelCapabilities.getResolvedModelCapabilities("kimi-coding-apikey/k3");
+
+  assert.equal(caps.supportsVision, true, "K3 must resolve as vision-capable");
+  assert.equal(caps.attachment, true, "exposed attachment must agree with supportsVision");
+  assert.ok(
+    caps.modalitiesInput.some((m) => m.toLowerCase().includes("image")),
+    "input modalities must keep image after reconcile"
+  );
+  assert.ok(
+    caps.modalitiesInput.some((m) => m.toLowerCase().includes("video")),
+    "input modalities must keep video after reconcile"
+  );
+});
+
+test("#8250 alias providers (kimi-coding / kmc / kmca) reconcile the same way", () => {
+  seedContradictoryK3Capabilities();
+  for (const id of ["kimi-coding/k3", "kmc/k3", "kmca/k3"]) {
+    const caps = modelCapabilities.getResolvedModelCapabilities(id);
+    assert.equal(caps.supportsVision, true, `${id} supportsVision`);
+    assert.equal(caps.attachment, true, `${id} attachment`);
+    assert.ok(
+      caps.modalitiesInput.some((m) => /image/i.test(m)),
+      `${id} modalitiesInput keeps image`
+    );
+  }
+});
+
+test("#8250 sync transform promotes attachment=false when modalities declare image/video", () => {
+  const caps = transformModelsDevToCapabilities({
+    "kimi-for-coding": {
+      id: "kimi-for-coding",
+      models: {
+        k3: {
+          id: "k3",
+          name: "Kimi K3",
+          attachment: false,
+          reasoning: true,
+          tool_call: true,
+          release_date: "2026-01-01",
+          last_updated: "2026-01-01",
+          open_weights: false,
+          limit: { context: 1048576, output: 1048576 },
+          modalities: { input: ["text", "image", "video"], output: ["text"] },
+        },
+      },
+    },
+  } as never);
+
+  // Mapped onto OmniRoute provider ids for kimi-for-coding
+  const row = caps["kimi-coding-apikey"]?.k3 ?? caps["kimi-coding"]?.k3;
+  assert.ok(row, "expected transformed k3 capability under a kimi-coding* provider");
+  assert.equal(row.attachment, true, "sync must normalize attachment to true");
+  assert.deepEqual(JSON.parse(row.modalities_input), ["text", "image", "video"]);
+});
+
+test("#8250 sync transform leaves consistent text-only rows alone", () => {
+  const caps = transformModelsDevToCapabilities({
+    minimal: {
+      id: "minimal",
+      models: {
+        "text-only": {
+          id: "text-only",
+          name: "Text Only",
+          attachment: false,
+          reasoning: false,
+          tool_call: false,
+          release_date: "2026-01-01",
+          last_updated: "2026-01-01",
+          open_weights: false,
+          limit: { context: 4096, output: 2048 },
+          modalities: { input: ["text"], output: ["text"] },
+        },
+      },
+    },
+  } as never);
+
+  assert.equal(caps.minimal["text-only"].attachment, false);
+});
+
+test("#8250 known text-only override still beats wrong image modalities (#4071)", () => {
+  // Guard: the #8250 modalities-over-false-attachment reconcile must NOT undo
+  // the #4071 hard text-only override for mimo-v2.5-pro.
+  modelsDevSync.saveModelsDevCapabilities({
+    "xiaomi-mimo": {
+      "mimo-v2.5-pro": buildCapability({
+        attachment: false,
+        modalities_input: JSON.stringify(["text", "image"]),
+        modalities_output: JSON.stringify(["text"]),
+      }),
+    },
+  });
+  const pro = modelCapabilities.getResolvedModelCapabilities("xiaomi-mimo/mimo-v2.5-pro");
+  assert.equal(pro.supportsVision, false, "text-only override must still win");
+});