env('OPENAI_API_KEY'), 'default_model' => env('OPENAI_DEFAULT_MODEL', 'gpt-3.5-turbo'), 'models' => [ 'gpt-3.5-turbo' => [ 'name' => 'GPT-3.5 Turbo', 'max_tokens' => 4096, 'cost_per_1k_tokens' => 0.002, ], 'gpt-4' => [ 'name' => 'GPT-4', 'max_tokens' => 8192, 'cost_per_1k_tokens' => 0.03, ], 'gpt-4-turbo' => [ 'name' => 'GPT-4 Turbo', 'max_tokens' => 128000, 'cost_per_1k_tokens' => 0.01, ], ], 'timeout' => env('OPENAI_TIMEOUT', 30), 'max_retries' => env('OPENAI_MAX_RETRIES', 3), 'temperature' => [ 'low' => 0.3, 'medium' => 0.7, 'high' => 0.9, ], 'supported_languages' => [ 'en' => 'English', 'es' => 'Spanish', 'fr' => 'French', 'de' => 'German', 'it' => 'Italian', ], ];