adding env override option

Author: Cooops

.env.example

@@ -265,6 +265,7 @@ GOOGLE_GENERATIVE_AI_API_KEY=   # Gemini API key
 ALI_BAILIAN_API_KEY=            # Ali Bailian API Key
 NANOGPT_API_KEY=                # NanoGPT API Key
 TOGETHER_API_KEY=               # Together API Key
+TOGETHER_IMAGE_MODEL=           # Default: black-forest-labs/FLUX.1-schnell
 
 ######################################
 #### Crypto Plugin Configurations ####

packages/core/src/models.ts

@@ -295,7 +295,7 @@ export const models: Models = {
                 name: "togethercomputer/m2-bert-80M-32k-retrieval",
             },
             [ModelClass.IMAGE]: {
-                name: "black-forest-labs/FLUX.1-schnell",
+                name: settings.TOGETHER_IMAGE_MODEL || "black-forest-labs/FLUX.1-schnell",
                 steps: 4,
             },
         },