diff --git a/src/gptscript.ts b/src/gptscript.ts
index baa8a15..8b8fbf9 100644
--- a/src/gptscript.ts
+++ b/src/gptscript.ts
@@ -168,18 +168,19 @@ export class GPTScript {
         }
     }
 
-    listModels(providers?: string[], credentialOverrides?: string[]): Promise<string> {
+    async listModels(providers?: string[], credentialOverrides?: string[]): Promise<Array<Model>> {
         if (this.opts.DefaultModelProvider) {
             if (!providers) {
                 providers = []
             }
             providers.push(this.opts.DefaultModelProvider)
         }
-        return this.runBasicCommand("list-models", {
+        const result = await this.runBasicCommand("list-models", {
             "providers": providers,
             "env": this.opts.Env,
             "credentialOverrides": credentialOverrides
         })
+        return await JSON.parse(result) as Array<Model>
     }
 
     version(): Promise<string> {
@@ -1229,6 +1230,34 @@ export type Credential = {
     refreshToken?: string | undefined
 }
 
+// Types for OpenAI API-compatible models
+
+export type Permission = {
+    created: number,
+    id: string,
+    object: string,
+    allow_create_engine: boolean,
+    allow_sampling: boolean,
+    allow_logprobs: boolean,
+    allow_search_indices: boolean,
+    allow_view: boolean,
+    allow_fine_tuning: boolean,
+    organization: string,
+    group: any,
+    is_blocking: boolean,
+}
+
+export type Model = {
+    created: number,
+    id: string,
+    object: string,
+    owned_by: string,
+    permission: Array<Permission>,
+    root: string,
+    parent: string,
+    metadata: Record<string, string>,
+}
+
 // for internal use only
 type cred = {
     context: string
diff --git a/tests/gptscript.test.ts b/tests/gptscript.test.ts
index 077107c..6cc0cfb 100644
--- a/tests/gptscript.test.ts
+++ b/tests/gptscript.test.ts
@@ -51,12 +51,12 @@ describe("gptscript module", () => {
             return
         }
 
-        let models = await g.listModels(["github.com/gptscript-ai/claude3-anthropic-provider"], ["github.com/gptscript-ai/claude3-anthropic-provider/credential:ANTHROPIC_API_KEY"])
+        const models = await g.listModels(["github.com/gptscript-ai/claude3-anthropic-provider"], ["github.com/gptscript-ai/claude3-anthropic-provider/credential:ANTHROPIC_API_KEY"])
         expect(models).toBeDefined()
-        for (let model of models.split("\n")) {
+        for (const model of models) {
             expect(model).toBeDefined()
-            expect(model.startsWith("claude-3-")).toBe(true)
-            expect(model.endsWith("from github.com/gptscript-ai/claude3-anthropic-provider")).toBe(true)
+            expect(model.id.startsWith("claude-3-")).toBe(true)
+            expect(model.id.endsWith("from github.com/gptscript-ai/claude3-anthropic-provider")).toBe(true)
         }
     }, 60000)
 
@@ -67,12 +67,12 @@ describe("gptscript module", () => {
 
         const newg = new gptscript.GPTScript({DefaultModelProvider: "github.com/gptscript-ai/claude3-anthropic-provider"})
         try {
-            let models = await newg.listModels(undefined, ["github.com/gptscript-ai/claude3-anthropic-provider/credential:ANTHROPIC_API_KEY"])
+            const models = await newg.listModels(undefined, ["github.com/gptscript-ai/claude3-anthropic-provider/credential:ANTHROPIC_API_KEY"])
             expect(models).toBeDefined()
-            for (let model of models.split("\n")) {
+            for (const model of models) {
                 expect(model).toBeDefined()
-                expect(model.startsWith("claude-3-")).toBe(true)
-                expect(model.endsWith("from github.com/gptscript-ai/claude3-anthropic-provider")).toBe(true)
+                expect(model.id.startsWith("claude-3-")).toBe(true)
+                expect(model.id.endsWith("from github.com/gptscript-ai/claude3-anthropic-provider")).toBe(true)
             }
         } finally {
             newg.close()