README.md in ruby-openai-swarm-0.4.0.1 vs README.md in ruby-openai-swarm-0.4.0.2

@@ -14,11 +14,11 @@
 - [Table of Contents](#table-of-contents)
   - [Installation](#installation)
     - [Bundler](#bundler)
     - [Gem install](#gem-install)
     - [Logger](#logger)
-  - [examples](#examples)
+  - [Quick start](#quick-start)
   - [Documentation](#documentation)
 
 ## quick show
 https://github.com/user-attachments/assets/ed84ef83-5ccb-4223-abb8-933d0ec66468
 
@@ -84,11 +84,11 @@
 
 def spanish_agent
   OpenAISwarm::Agent.new(
     name: "Spanish Agent",
     instructions: "You only speak Spanish.",
-    model: "gpt-4o-mini"
+    model: ENV['SWARM_AGENT_DEFAULT_MODEL']
   )
 end
 
 transfer_to_spanish_agent = OpenAISwarm::FunctionDescriptor.new(
   target_method: :spanish_agent,
@@ -96,11 +96,11 @@
 )
 
 english_agent = OpenAISwarm::Agent.new(
   name: "English Agent",
   instructions: "You only speak English.",
-  model: "gpt-4o-mini",
+  model: ENV['SWARM_AGENT_DEFAULT_MODEL'],
   functions: [transfer_to_spanish_agent]
 )
 
 messages = [{"role": "user", "content": "Hola. ¿Como estás?"}]
 response = client.run(agent: english_agent, messages: messages, debug: true)
@@ -125,22 +125,37 @@
   # config.logger = Logger.new(Rails.root.join('log', 'openai_swarm.log'))
   # config.logger = Rails.configuration.lograge.logger
 end
 ```
 
-# Examples
+## Quick Start
 
-Setting ACCESS_TOKEN for AI Providers in examples
+### Choose the default model name
 
+`export SWARM_AGENT_DEFAULT_MODEL=gpt-4o-mini`
+
+or
+
+`export SWARM_AGENT_DEFAULT_MODEL=deepseek-chat`
+
+DeepSeek V3 is 1/10 price of gpt-4o-mini, so try it!
+
+
+### Setting ACCESS_TOKEN for AI Providers in examples
+
 - For OpenRouter:
 
   `OPEN_ROUTER_ACCESS_TOKEN=cxxxxx` or `export OPEN_ROUTER_ACCESS_TOKEN=cxxxxx`
 
 - For OpenAI:
 
   `OPENAI_ACCESS_TOKEN=cxxxxx` or `export OPENAI_ACCESS_TOKEN=cxxxxx`
 
-Check out `/examples` for inspiration! Learn more about each one in its README.
+- For DeepSeek:
+
+  `DEEPSEEK_ACCESS_TOKEN=cxxxxx` or `export DEEPSEEK_ACCESS_TOKEN=cxxxxx`
+
+### Check out `/examples` for inspiration! Learn more about each one in its README.
 
 - [X] [`basic`](examples/basic): Simple examples of fundamentals like setup, function calling, handoffs, and context variables
   - running: `ruby examples/basic/agent_handoff.rb`
   - running: `ruby examples/basic/bare_minimum.rb`
   - running: `ruby examples/basic/context_variables.rb`