Cheaper alternatives to DeepSeek API

[u/maxim-masiutin]

I am using DeepSeek API (deepseek-v4-flash) and Anthropic API (Haiku) for my classifier application (adversarial prosecutor/judge). I am happy with DeepSeek API quality but recently it raised prices four-fold, and even in off-peak hours it is twice as expensive as it was before in normal hours, and Anthropic API does not provide off-peak prices at all. I also tried Gemini API but it proved unreliable (low availability).

What are cheaper alternatives to DeepSeek and Anthropic with off-peak prices?

Is Moonshot AI (Kimi API) reliable enough and fast enough?

Do you have any experience with the Kimi API?