diff --git a/cloud/app/src/routes/gateway/v1/chat/completions.ts b/cloud/app/src/routes/gateway/v1/chat/completions.ts
index aace256f..bd33a1eb 100644
--- a/cloud/app/src/routes/gateway/v1/chat/completions.ts
+++ b/cloud/app/src/routes/gateway/v1/chat/completions.ts
@@ -1,3 +1,6 @@
+/**
+ * @deprecated Use zen/v1/chat/completions instead
+ */
 import { Resource } from "@opencode/cloud-resource"
 import type { APIEvent } from "@solidjs/start/server"
 import { Database, eq, sql } from "@opencode/cloud-core/drizzle/index.js"
diff --git a/cloud/app/src/routes/zen/v1/chat/completions.ts b/cloud/app/src/routes/zen/v1/chat/completions.ts
new file mode 100644
index 00000000..aace256f
--- /dev/null
+++ b/cloud/app/src/routes/zen/v1/chat/completions.ts
@@ -0,0 +1,305 @@
+import { Resource } from "@opencode/cloud-resource"
+import type { APIEvent } from "@solidjs/start/server"
+import { Database, eq, sql } from "@opencode/cloud-core/drizzle/index.js"
+import { KeyTable } from "@opencode/cloud-core/schema/key.sql.js"
+import { BillingTable, UsageTable } from "@opencode/cloud-core/schema/billing.sql.js"
+import { centsToMicroCents } from "@opencode/cloud-core/util/price.js"
+import { Identifier } from "@opencode/cloud-core/identifier.js"
+
+const MODELS = {
+  //  "anthropic/claude-sonnet-4": {
+  //    auth: true,
+  //    api: "https://api.anthropic.com",
+  //    apiKey: Resource.ANTHROPIC_API_KEY.value,
+  //    model: "claude-sonnet-4-20250514",
+  //    cost: {
+  //      input: 0.0000015,
+  //      output: 0.000006,
+  //      reasoning: 0.0000015,
+  //      cacheRead: 0.0000001,
+  //      cacheWrite: 0.0000001,
+  //    },
+  //    headerMappings: {},
+  //  },
+  "qwen/qwen3-coder": {
+    id: "qwen/qwen3-coder",
+    auth: true,
+    api: "https://inference.baseten.co",
+    apiKey: Resource.BASETEN_API_KEY.value,
+    model: "Qwen/Qwen3-Coder-480B-A35B-Instruct",
+    cost: {
+      input: 0.00000038,
+      output: 0.00000153,
+      reasoning: 0,
+      cacheRead: 0,
+      cacheWrite: 0,
+    },
+    headerMappings: {},
+  },
+  "grok-code": {
+    id: "x-ai/grok-code-fast-1",
+    auth: false,
+    api: "https://api.x.ai",
+    apiKey: Resource.XAI_API_KEY.value,
+    model: "grok-code",
+    cost: {
+      input: 0,
+      output: 0,
+      reasoning: 0,
+      cacheRead: 0,
+      cacheWrite: 0,
+    },
+    headerMappings: {
+      "x-grok-conv-id": "x-opencode-session",
+      "x-grok-req-id": "x-opencode-request",
+    },
+  },
+}
+
+class AuthError extends Error {}
+class CreditsError extends Error {}
+class ModelError extends Error {}
+
+export async function POST(input: APIEvent) {
+  try {
+    const url = new URL(input.request.url)
+    const body = await input.request.json()
+    const MODEL = validateModel()
+    const apiKey = await authenticate()
+    await checkCredits()
+
+    // Request to model provider
+    const res = await fetch(new URL(url.pathname.replace(/^\/gateway/, "") + url.search, MODEL.api), {
+      method: "POST",
+      headers: (() => {
+        const headers = input.request.headers
+        headers.delete("host")
+        headers.delete("content-length")
+        headers.set("authorization", `Bearer ${MODEL.apiKey}`)
+        Object.entries(MODEL.headerMappings ?? {}).forEach(([k, v]) => {
+          headers.set(k, headers.get(v)!)
+        })
+        return headers
+      })(),
+      body: JSON.stringify({
+        ...body,
+        model: MODEL.model,
+        stream_options: {
+          include_usage: true,
+        },
+      }),
+    })
+
+    // Scrub response headers
+    const resHeaders = new Headers()
+    const keepHeaders = ["content-type", "cache-control"]
+    for (const [k, v] of res.headers.entries()) {
+      if (keepHeaders.includes(k.toLowerCase())) {
+        resHeaders.set(k, v)
+      }
+    }
+
+    // Handle non-streaming response
+    if (!body.stream) {
+      const body = await res.json()
+      await trackUsage(body)
+      return new Response(JSON.stringify(body), {
+        status: res.status,
+        statusText: res.statusText,
+        headers: resHeaders,
+      })
+    }
+
+    // Handle streaming response
+    const stream = new ReadableStream({
+      start(c) {
+        const reader = res.body?.getReader()
+        const decoder = new TextDecoder()
+        let buffer = ""
+
+        function pump(): Promise<void> {
+          return (
+            reader?.read().then(async ({ done, value }) => {
+              if (done) {
+                c.close()
+                return
+              }
+
+              buffer += decoder.decode(value, { stream: true })
+
+              const parts = buffer.split("\n\n")
+              buffer = parts.pop() ?? ""
+
+              const usage = parts
+                .map((part) => part.trim())
+                .filter((part) => part.startsWith("data: "))
+                .map((part) => {
+                  try {
+                    return JSON.parse(part.slice(6))
+                  } catch (e) {
+                    return {}
+                  }
+                })
+                .find((part) => part.usage)
+              if (usage) await trackUsage(usage)
+
+              c.enqueue(value)
+
+              return pump()
+            }) || Promise.resolve()
+          )
+        }
+
+        return pump()
+      },
+    })
+
+    return new Response(stream, {
+      status: res.status,
+      statusText: res.statusText,
+      headers: resHeaders,
+    })
+
+    function validateModel() {
+      if (!(body.model in MODELS)) {
+        throw new ModelError(`Model ${body.model} not supported`)
+      }
+      return MODELS[body.model as keyof typeof MODELS]
+    }
+
+    async function authenticate() {
+      try {
+        const authHeader = input.request.headers.get("authorization")
+        if (!authHeader || !authHeader.startsWith("Bearer ")) throw new AuthError("Missing API key.")
+
+        const apiKey = authHeader.split(" ")[1]
+        const key = await Database.use((tx) =>
+          tx
+            .select({
+              id: KeyTable.id,
+              workspaceID: KeyTable.workspaceID,
+            })
+            .from(KeyTable)
+            .where(eq(KeyTable.key, apiKey))
+            .then((rows) => rows[0]),
+        )
+
+        if (!key) throw new AuthError("Invalid API key.")
+        return key
+      } catch (e) {
+        console.log(e)
+        // ignore error if model does not require authentication
+        if (!MODEL.auth) return
+        throw e
+      }
+    }
+
+    async function checkCredits() {
+      if (!apiKey || !MODEL.auth) return
+
+      const billing = await Database.use((tx) =>
+        tx
+          .select({
+            balance: BillingTable.balance,
+          })
+          .from(BillingTable)
+          .where(eq(BillingTable.workspaceID, apiKey.workspaceID))
+          .then((rows) => rows[0]),
+      )
+
+      if (billing.balance <= 0) throw new CreditsError("Insufficient balance")
+    }
+
+    async function trackUsage(chunk: any) {
+      console.log(`trackUsage ${apiKey}`)
+
+      if (!apiKey) return
+
+      const usage = chunk.usage
+      const inputTokens = usage.prompt_tokens ?? 0
+      const outputTokens = usage.completion_tokens ?? 0
+      const reasoningTokens = usage.completion_tokens_details?.reasoning_tokens ?? 0
+      const cacheReadTokens = usage.prompt_tokens_details?.cached_tokens ?? 0
+      //const cacheWriteTokens = providerMetadata?.["anthropic"]?.["cacheCreationInputTokens"] ?? 0
+      const cacheWriteTokens = 0
+
+      const inputCost = MODEL.cost.input * inputTokens
+      const outputCost = MODEL.cost.output * outputTokens
+      const reasoningCost = MODEL.cost.reasoning * reasoningTokens
+      const cacheReadCost = MODEL.cost.cacheRead * cacheReadTokens
+      const cacheWriteCost = MODEL.cost.cacheWrite * cacheWriteTokens
+      const costInCents = (inputCost + outputCost + reasoningCost + cacheReadCost + cacheWriteCost) * 100
+      const cost = centsToMicroCents(costInCents)
+
+      await Database.transaction(async (tx) => {
+        await tx.insert(UsageTable).values({
+          workspaceID: apiKey.workspaceID,
+          id: Identifier.create("usage"),
+          model: MODEL.id,
+          inputTokens,
+          outputTokens,
+          reasoningTokens,
+          cacheReadTokens,
+          cacheWriteTokens,
+          cost,
+        })
+        await tx
+          .update(BillingTable)
+          .set({
+            balance: sql`${BillingTable.balance} - ${cost}`,
+          })
+          .where(eq(BillingTable.workspaceID, apiKey.workspaceID))
+      })
+
+      await Database.use((tx) =>
+        tx
+          .update(KeyTable)
+          .set({ timeUsed: sql`now()` })
+          .where(eq(KeyTable.id, apiKey.id)),
+      )
+    }
+  } catch (error: any) {
+    if (error instanceof AuthError) {
+      return new Response(
+        JSON.stringify({
+          error: {
+            message: error.message,
+            type: "invalid_request_error",
+            param: null,
+            code: "unauthorized",
+          },
+        }),
+        {
+          status: 401,
+        },
+      )
+    }
+
+    if (error instanceof CreditsError) {
+      return new Response(
+        JSON.stringify({
+          error: {
+            message: error.message,
+            type: "insufficient_quota",
+            param: null,
+            code: "insufficient_quota",
+          },
+        }),
+        {
+          status: 401,
+        },
+      )
+    }
+
+    if (error instanceof ModelError) {
+      return new Response(JSON.stringify({ error: { message: error.message } }), {
+        status: 401,
+      })
+    }
+
+    console.log(error)
+    return new Response(JSON.stringify({ error: { message: error.message } }), {
+      status: 500,
+    })
+  }
+}