BYOK vs managed API: which one should you pick for AI coding?

Every AI coding tool eventually asks you the same question: do you want to use our models, or bring your own? The answer shapes how much you spend, how private your code stays, and which models you can actually reach. Ava Supernova supports both on every plan — this guide is the decision tree we wish we had when we were picking.

What "BYOK" actually means

Bring-your-own-key means you hold the API key from a model provider (Kimi, Anthropic, DeepSeek, Mistral, Zhipu, MiniMax, Qwen), and the coding tool uses your key to make calls. You pay the provider directly. The tool charges nothing for the request itself — just for being the tool.

Managed means the coding tool holds the keys, runs the models through its own infrastructure, and bills you in credits or tokens. You trade per-request choice for a flat monthly price and a curated model lineup.

Pick BYOK when

• You already have a paid account at Anthropic, Moonshot, DeepSeek, or another provider — those credits would otherwise sit idle.
• You need a model that is not in any managed tier yet (Ava adds them as fast as it can, but Kimi K2.6 and Opus 4.7 often land on BYOK first).
• Your code is sensitive enough that you want every request to go to the model provider directly, with no middleware holding the payload.
• You are a heavy user and the math is better at provider list price than at any credit pack.
• You prefer to pay per request rather than commit to a monthly subscription.

Pick managed when

• You want a predictable monthly bill and a cap on surprise costs.
• You want one invoice, not six.
• You want the tool to auto-route between models (cheap classifier for routing, strong model for the heavy lift) without you managing six provider keys.
• You want the Creative Studio bundle (image, music, video, voice generation) which is painful to assemble provider-by-provider.

You do not have to choose

Ava Supernova lets you run both modes side-by-side on any plan, including Free. Managed credits handle your everyday agentic work on Qwen 3.6 Plus and the MiniMax Creative Studio; BYOK keys kick in when you want Kimi K2.6 for a gnarly refactor, or Opus 4.7 for a judgment call, or DeepSeek when you want the cheap end of the spectrum. BYOK requests do not eat your credit allowance — they go straight to the provider.

What about privacy?

BYOK is the stricter privacy path. The request goes straight to the provider; Ava never sees the payload or stores it. With managed plans, Ava does handle the request to route it and bill it — but the platform is local-first by design, so your memory, chat history, and generated files stay on your machine unless you opt into cloud sync. Either way, no training on your code.

The short answer: start BYOK for privacy, upgrade to managed when convenience beats the per-key overhead. Either way, your keys, your data, your choice.