feat: add default model provider option

Signed-off-by: Donnie Adams <donnie@acorn.io>

Author: thedadams

README.md

@@ -43,7 +43,8 @@ option. Any `env` provided in the run options are appended.
 
 - `APIKey`: Specify an OpenAI API key for authenticating requests
 - `BaseURL`: A base URL for an OpenAI compatible API (the default is `https://api.openai.com/v1`)
-- `DefaultModel`: The default model to use for OpenAI requests
+- `DefaultModel`: The default model to use for chat completion requests
+- `DefaultModelProvider`: The default model provider to use for chat completion requests
 - `Env`: Replace the system's environment variables with these in the for `KEY=VAL`
 
 ## Run Options

src/gptscript.ts

@@ -7,6 +7,7 @@ export interface GlobalOpts {
     APIKey?: string
     BaseURL?: string
     DefaultModel?: string
+    DefaultModelProvider?: string
     Env?: string[]
 }
 
@@ -24,6 +25,9 @@ function globalOptsToEnv(env: NodeJS.ProcessEnv, opts?: GlobalOpts) {
     if (opts.DefaultModel) {
         env["GPTSCRIPT_SDKSERVER_DEFAULT_MODEL"] = opts.DefaultModel
     }
+    if (opts.DefaultModelProvider) {
+        env["GPTSCRIPT_SDKSERVER_DEFAULT_MODEL_PROVIDER"] = opts.DefaultModelProvider
+    }
 }
 
 export interface RunOpts {