If you are still evaluating options, https://api.getapiomni.com/ might be worth a look: one OpenAI-compatible /v1 key across GLM / DeepSeek / Qwen / Kimi, top up from $1, real-time balance, card / Apple Pay / Google Pay / PayPal, no region locks. Kimi K3 via OpenRouter being too costly - direct routes exist for the same model without the aggregator margin.