diff --git a/src/models.ts b/src/models.ts
index 954d8d7..a913f8e 100644
--- a/src/models.ts
+++ b/src/models.ts
@@ -97,7 +97,7 @@ export type ConfigModel = {
 
 function buildLookupMap(modelsDevData: ModelsDevData) {
   const byFullId = new Map<string, ModelDevEntry>();
-  const allowedProviders = new Set(["openai", "anthropic"]);
+  const allowedProviders = new Set(["openai", "anthropic", "deepseek"]);
 
   for (const [provider, providerData] of Object.entries(modelsDevData)) {
     if (!allowedProviders.has(provider) || !providerData?.models) continue;
@@ -156,8 +156,8 @@ export async function fetchHubModels(): Promise<HubResponse> {
   return res.json() as Promise<HubResponse>;
 }
 
-function checkIsAnthropic(provider: string): boolean {
-  return provider === "anthropic";
+function usesAnthropicApi(provider: string): boolean {
+  return provider === "anthropic" || provider === "deepseek";
 }
 
 export function buildConfigModels(
@@ -171,7 +171,7 @@ export function buildConfigModels(
   for (const [provider, providerData] of Object.entries(hubData.providers)) {
     if (!providerData?.models) continue;
 
-    const anthropic = checkIsAnthropic(provider);
+    const anthropic = usesAnthropicApi(provider);
 
     for (const [modelId, hubModel] of Object.entries(providerData.models)) {
       const entry = resolveEntry(provider, modelId, byFullId);
diff --git a/test/index.test.ts b/test/index.test.ts
index e4a582b..a73444d 100644
--- a/test/index.test.ts
+++ b/test/index.test.ts
@@ -65,6 +65,43 @@ const MODELS_DEV_DATA = {
       },
     },
   },
+  deepseek: {
+    models: {
+      "deepseek-v4-pro": {
+        id: "deepseek-v4-pro",
+        name: "DeepSeek V4 Pro",
+        limit: { context: 128000, output: 32000 },
+        attachment: true,
+        reasoning: true,
+        temperature: true,
+        tool_call: true,
+        modalities: {
+          input: ["text"],
+          output: ["text"],
+        },
+        cost: { input: 1.5, output: 6, cache_read: 0.15, cache_write: 1.5 },
+      },
+      "deepseek-v4-flash": {
+        id: "deepseek-v4-flash",
+        name: "DeepSeek V4 Flash",
+        limit: { context: 128000, output: 32000 },
+        attachment: true,
+        reasoning: true,
+        temperature: true,
+        tool_call: true,
+        modalities: {
+          input: ["text"],
+          output: ["text"],
+        },
+        cost: {
+          input: 0.15,
+          output: 0.6,
+          cache_read: 0.015,
+          cache_write: 0.15,
+        },
+      },
+    },
+  },
 };
 
 function hubResponse() {
@@ -80,6 +117,12 @@ function hubResponse() {
           "claude-sonnet-4-20250514": { display_name: "Claude Sonnet 4" },
         },
       },
+      deepseek: {
+        models: {
+          "deepseek-v4-pro": { display_name: "DeepSeek V4 Pro" },
+          "deepseek-v4-flash": { display_name: "DeepSeek V4 Flash" },
+        },
+      },
     },
   };
 }
@@ -169,6 +212,48 @@ describe("config hook", () => {
           "interleaved-thinking-2025-05-14,fine-grained-tool-streaming-2025-05-14",
       },
     });
+
+    expect(models["deepseek-v4-pro"]).toEqual({
+      id: "deepseek-v4-pro",
+      name: "DeepSeek V4 Pro",
+      provider: {
+        api: "https://hub.coreinfra.ai/claude/api/v1",
+        npm: "@ai-sdk/anthropic",
+      },
+      attachment: true,
+      reasoning: true,
+      temperature: true,
+      tool_call: true,
+      modalities: { input: ["text"], output: ["text"] },
+      cost: { input: 1.5, output: 6, cache_read: 0.15, cache_write: 1.5 },
+      limit: { context: 128000, output: 32000 },
+      interleaved: { field: "reasoning_content" },
+      headers: {
+        "anthropic-beta":
+          "interleaved-thinking-2025-05-14,fine-grained-tool-streaming-2025-05-14",
+      },
+    });
+
+    expect(models["deepseek-v4-flash"]).toEqual({
+      id: "deepseek-v4-flash",
+      name: "DeepSeek V4 Flash",
+      provider: {
+        api: "https://hub.coreinfra.ai/claude/api/v1",
+        npm: "@ai-sdk/anthropic",
+      },
+      attachment: true,
+      reasoning: true,
+      temperature: true,
+      tool_call: true,
+      modalities: { input: ["text"], output: ["text"] },
+      cost: { input: 0.15, output: 0.6, cache_read: 0.015, cache_write: 0.15 },
+      limit: { context: 128000, output: 32000 },
+      interleaved: { field: "reasoning_content" },
+      headers: {
+        "anthropic-beta":
+          "interleaved-thinking-2025-05-14,fine-grained-tool-streaming-2025-05-14",
+      },
+    });
   });
 
   it("uses defaults when models.dev has no matching model", async () => {
diff --git a/test/models.test.ts b/test/models.test.ts
index a585771..b44deee 100644
--- a/test/models.test.ts
+++ b/test/models.test.ts
@@ -52,6 +52,43 @@ const MODELS_DEV_FIXTURE = {
       },
     },
   },
+  deepseek: {
+    models: {
+      "deepseek-v4-pro": {
+        id: "deepseek-v4-pro",
+        name: "DeepSeek V4 Pro",
+        limit: { context: 128000, output: 32000 },
+        attachment: true,
+        reasoning: true,
+        temperature: true,
+        tool_call: true,
+        modalities: {
+          input: ["text"],
+          output: ["text"],
+        },
+        cost: { input: 1.5, output: 6, cache_read: 0.15, cache_write: 1.5 },
+      },
+      "deepseek-v4-flash": {
+        id: "deepseek-v4-flash",
+        name: "DeepSeek V4 Flash",
+        limit: { context: 128000, output: 32000 },
+        attachment: true,
+        reasoning: true,
+        temperature: true,
+        tool_call: true,
+        modalities: {
+          input: ["text"],
+          output: ["text"],
+        },
+        cost: {
+          input: 0.15,
+          output: 0.6,
+          cache_read: 0.015,
+          cache_write: 0.15,
+        },
+      },
+    },
+  },
 };
 
 const HUB_FIXTURE = {
@@ -66,6 +103,12 @@ const HUB_FIXTURE = {
         "claude-sonnet-4-20250514": { display_name: "Claude Sonnet 4" },
       },
     },
+    deepseek: {
+      models: {
+        "deepseek-v4-pro": { display_name: "DeepSeek V4 Pro" },
+        "deepseek-v4-flash": { display_name: "DeepSeek V4 Flash" },
+      },
+    },
   },
 };
 
@@ -77,7 +120,7 @@ describe("buildConfigModels", () => {
     );
 
     expect(warnings).toEqual([]);
-    expect(Object.keys(models)).toHaveLength(2);
+    expect(Object.keys(models)).toHaveLength(4);
 
     const gpt = models["gpt-5.4-nano"];
     expect(gpt).toEqual({
@@ -125,6 +168,56 @@ describe("buildConfigModels", () => {
           "interleaved-thinking-2025-05-14,fine-grained-tool-streaming-2025-05-14",
       },
     });
+
+    const dsPro = models["deepseek-v4-pro"];
+    expect(dsPro).toEqual({
+      id: "deepseek-v4-pro",
+      name: "DeepSeek V4 Pro",
+      provider: {
+        api: "https://hub.coreinfra.ai/claude/api/v1",
+        npm: "@ai-sdk/anthropic",
+      },
+      attachment: true,
+      reasoning: true,
+      temperature: true,
+      tool_call: true,
+      modalities: {
+        input: ["text"],
+        output: ["text"],
+      },
+      cost: { input: 1.5, output: 6, cache_read: 0.15, cache_write: 1.5 },
+      limit: { context: 128000, output: 32000 },
+      interleaved: { field: "reasoning_content" },
+      headers: {
+        "anthropic-beta":
+          "interleaved-thinking-2025-05-14,fine-grained-tool-streaming-2025-05-14",
+      },
+    });
+
+    const dsFlash = models["deepseek-v4-flash"];
+    expect(dsFlash).toEqual({
+      id: "deepseek-v4-flash",
+      name: "DeepSeek V4 Flash",
+      provider: {
+        api: "https://hub.coreinfra.ai/claude/api/v1",
+        npm: "@ai-sdk/anthropic",
+      },
+      attachment: true,
+      reasoning: true,
+      temperature: true,
+      tool_call: true,
+      modalities: {
+        input: ["text"],
+        output: ["text"],
+      },
+      cost: { input: 0.15, output: 0.6, cache_read: 0.015, cache_write: 0.15 },
+      limit: { context: 128000, output: 32000 },
+      interleaved: { field: "reasoning_content" },
+      headers: {
+        "anthropic-beta":
+          "interleaved-thinking-2025-05-14,fine-grained-tool-streaming-2025-05-14",
+      },
+    });
   });
 
   it("uses defaults and emits warning when model not in models.dev", () => {
@@ -197,7 +290,7 @@ describe("buildConfigModels", () => {
     expect(models["shared-id"].limit.context).toBe(100000);
   });
 
-  it("does not resolve from non-openai/anthropic providers in models.dev", () => {
+  it("does not resolve from non-allowed providers in models.dev", () => {
     const modelsDevData = {
       "provider-a": {
         models: {