Where OpenRouter genuinely wins
If your product needs the long-tail of text-only chat models — Mistral fine-tunes, Llama variants, niche community models, experimental open-source — OpenRouter's catalog is unmatched. They also have the most mature crypto-native top-up flow, which matters if you operate in regions where cards are difficult. The community discussion around models, prompt techniques and benchmarks is also more active there.
Where Kunavo wins
Multimodal under one bill is the big one. The moment your product needs image generation, image editing, or video — OpenRouter doesn't cover those endpoints, so you'd be running two integrations and two billing relationships anyway. Kunavo gives you /v1/images, /v1/images/edits, /v1/video/generations, /v1/audio/speech and /v1/audio/music alongside chat, all OpenAI-shaped, all on the same wallet. The pricing also lands measurably lower: every enabled model is roughly 30% under the provider's official list price (we publish the per-1M-token rate on /pricing — easy to compare). Stripe-native checkout pulls in Apple Pay, Google Pay, ACH, SEPA, Alipay and WeChat Pay, which makes self-serve onboarding work outside the US and EU.
The honest takeaways
If you've already standardized on OpenRouter for text and your product never needs image or video, there's not a strong forcing function to switch — your existing OpenAI SDK code is portable to Kunavo (one base_url change), so you can keep both in your back pocket and migrate when the price gap becomes worth the integration time. If you're building anything multimodal, or you serve customers paying with local rails outside USD, Kunavo is the simpler stack. Either way, the test is small: $2 in free credit gets you 5 minutes of evaluation.