Add comprehensive list of free models to .env file for easy user selection

.env

@@ -1,13 +1,38 @@
 # OpenRouter API Configuration
 OPENROUTER_API_KEY=
 
-# OpenRouter Model Configuration. 
-
-# If you want to use a specific model, set it here.
-# If not set, it will default to "mistralai/mistral-small-3.2-24b-instruct:free"
-# You can change this to any model available on OpenRouter.
-# Example: OPENROUTER_MODEL=qwen/qwq-32b:free 
-# Example: OPENROUTER_MODEL=deepseek/deepseek-r1-0528:free
-# Example: OPENROUTER_MODEL=google/gemini-2.0-flash-exp:free
-# models are available at https://openrouter.ai/models 
-OPENROUTER_MODEL=
+# OpenRouter Model Configuration
+# 
+# If you want to use a specific model, uncomment one of the lines below.
+# If not set (or all are commented), it will default to "mistralai/mistral-small-3.2-24b-instruct:free"
+# You can also set it to any model available on OpenRouter: https://openrouter.ai/models
+
+# === FREE MODELS ===
+# Uncomment ONE of the following lines to use a specific free model:
+
+# Default model (used when no model is specified)
+# OPENROUTER_MODEL=mistralai/mistral-small-3.2-24b-instruct:free
+
+# Additional free models commonly available on OpenRouter
+
+# OPENROUTER_MODEL=qwen/qwq-32b:free
+# OPENROUTER_MODEL=deepseek/deepseek-r1-0528:free
+# OPENROUTER_MODEL=google/gemini-2.0-flash-exp:free
+# OPENROUTER_MODEL=meta-llama/llama-3.1-8b-instruct:free
+# OPENROUTER_MODEL=meta-llama/llama-3.1-70b-instruct:free
+# OPENROUTER_MODEL=microsoft/wizardlm-2-8x22b:free
+# OPENROUTER_MODEL=openchat/openchat-7b:free
+# OPENROUTER_MODEL=huggingfaceh4/zephyr-7b-beta:free
+# OPENROUTER_MODEL=nousresearch/nous-capybara-7b:free
+# OPENROUTER_MODEL=teknium/openhermes-2.5-mistral-7b:free
+# OPENROUTER_MODEL=gryphe/mythomist-7b:free
+# OPENROUTER_MODEL=toppy/toppy-m-7b:free
+# OPENROUTER_MODEL=koboldai/psyfighter-13b-2:free
+# OPENROUTER_MODEL=intel/neural-chat-7b-v3-1:free
+# OPENROUTER_MODEL=neversleep/noromaid-20b:free
+# OPENROUTER_MODEL=pygmalionai/mythalion-13b:free
+# OPENROUTER_MODEL=alpindale/goliath-120b:free
+# OPENROUTER_MODEL=anthropic/claude-3-5-haiku:free
+# OPENROUTER_MODEL=cohere/command-r-plus:free
+# OPENROUTER_MODEL=perplexity/llama-3.1-sonar-small-128k-online:free
+# OPENROUTER_MODEL=perplexity/llama-3.1-sonar-large-128k-online:free

README.md

@@ -157,23 +157,29 @@ ai explain machine learning
 
 ### Changing the AI Model
 
-You can change the AI model by editing the `OPENROUTER_MODEL` variable in your `.env` file:
+You can change the AI model by editing the `OPENROUTER_MODEL` variable in your `.env` file. The `.env` file now includes a comprehensive list of free models - simply uncomment the one you want to use:
 
 ```bash
 # Leave empty or unset to use the default model
 OPENROUTER_MODEL=
 
-# Or specify a different model
-OPENROUTER_MODEL=qwen/qwq-32b:free
+# Or uncomment one of the many free models listed in .env
+# OPENROUTER_MODEL=qwen/qwq-32b:free
+# OPENROUTER_MODEL=deepseek/deepseek-r1-0528:free
+# OPENROUTER_MODEL=google/gemini-2.0-flash-exp:free
 ```
 
-Popular free models on OpenRouter include:
+The `.env` file includes many free models on OpenRouter, including:
 - `mistralai/mistral-small-3.2-24b-instruct:free` (default)
 - `qwen/qwq-32b:free`
 - `deepseek/deepseek-r1-0528:free`
 - `google/gemini-2.0-flash-exp:free`
+- `meta-llama/llama-3.1-8b-instruct:free`
+- `meta-llama/llama-3.1-70b-instruct:free`
+- `microsoft/wizardlm-2-8x22b:free`
+- And many more! Check your `.env` file for the complete list.
 
-**Note:** If `OPENROUTER_MODEL` is not set or left empty, the script will use the default Mistral model.
+**Note:** If `OPENROUTER_MODEL` is not set or left empty, the script will use the default Mistral model. Simply uncomment one of the free models in your `.env` file to use a different model.
 
 ### Common Issues