GPT-4 vs Claude vs Qwen: Chatbot AI miễn phí nào tốt nhất?
A detailed comparison of the three leading AI chatbots you can use for free. We test GPT-4, Claude, and Qwen across coding, writing, reasoning, and more.
The three most capable AI chatbots available for free in 2026 are OpenAI's GPT-4, Anthropic's Claude, and Alibaba's Qwen. Each has distinct strengths, and the best choice depends on your specific needs. We tested all three across multiple categories to help you decide.
For coding tasks, GPT-4 and Claude both excel at generating complex, working code across many languages. Qwen 2.5 72B has closed the gap significantly and performs comparably on most common programming tasks. Where GPT-4 still leads is in understanding very large codebases and generating code for niche frameworks. Claude excels at explaining code and reasoning through bugs. Qwen offers the advantage of being fully open-source and running locally, which matters for privacy-sensitive projects.
For creative writing, Claude generally produces the most natural and nuanced prose. GPT-4 is versatile and follows complex instructions well. Qwen produces solid creative content, especially in Chinese and English. For academic and technical writing, all three perform well, but Claude tends to be more careful about accuracy and less prone to hallucination. GPT-4 handles long-form content and complex outlines best.
Reasoning and analysis is where the models diverge most. Claude 3.5 Sonnet shows particular strength in careful, step-by-step reasoning and is less likely to make logical errors. GPT-4 handles mathematical reasoning well and has strong general knowledge. Qwen 2.5 72B performs surprisingly well on reasoning benchmarks and offers the best price-to-performance ratio since it runs on open-source infrastructure.
On Free.ai, you can access all three models from a single interface. Qwen 2.5 7B runs on Free.ai's own servers and is always free (no token cost beyond daily limits). GPT-4 and Claude are available through the premium models selector and consume more tokens per message. The smart approach is to use Qwen for everyday tasks and switch to GPT-4 or Claude when you need their specific strengths. This way, you get the best of all worlds without paying for multiple subscriptions.