昨天在 opencode 客户端还能使用 deepseek-v4-flash-free 模型，今天就用不了，直接返回 Free promotion has ended for DeepSeek V4 Flash Free. You can continue using the model by subscribing to OpenCode Go 。大佬们也是这个提示吗，有点不死心呀。怀疑是我终端被 ban了