I use Openrouter for everything except Deepseek. For Deepseek I use their API directly.
I use it from pi.dev as well through the OpenCode Go $10 subscription ($5 first month).
Used more than 20M tokens at a cost of ~$20 (up to $60 is included in the $5 plan) Out of which deepseek pro had ~200 messages which is around 1.5M tokens (10+M cached)
You can check the logs in OpenRouter and see which providers it used and how many tokens you used.