FreeGPTHub: A truly free, unified GPT API gateway—unlike “fake-free” alternatives that hide paywalls behind quotas, trials, or mandatory top-ups. (真正免费的GPT统一接口，支持讯飞星火知识大模型，百度文心大模型，OpenAI ChatGPT，智谱大模型，幻方量化深度求索，字节豆包，阿里通义千问，稀宇科技MiniMax，魔搭社区开源模型等)