ChatGPT (OpenAI): The market-leading AI chatbot with a broad knowledge base and creative capabilities.
Claude (Anthropic): A large-context model family focused on safety and ethical operation ('Constitutional AI'). Its Claude Code product is a favorite tool among software developers.
Gemini (Google): Google's multimodal model, integrated into the search giant's ecosystem.
Mistral & Llama (Meta): Leading representatives of open source models, which can also be run locally. Mistral is the most important European (French) competitor in the race dominated by American and Chinese companies in large language models.
DeepSeek & Qwen: China's leading, high-performance language models with strong mathematical and coding capabilities.