// models.dart enum Role { system, user, assistant } class Message { final Role role; final String content; const Message({required this.role, required this.content}); Map toJson() => { 'role': role.name, 'content': content, }; } class G4FModels { static const String gpt4 = 'gpt-4'; static const String gpt4o = 'gpt-4o'; static const String gpt4oMini = 'gpt-4o-mini'; static const String commandR = 'command-r'; static const String commandRPlus = 'command-r-plus'; static const String mistral = 'mistral'; static const String llama3 = 'llama-3'; static const String qwen = 'qwen'; static const String openaiFast = 'openai-fast'; }