Bring your own key (BYOK) & multi-model

What problem it solves

Bundled AI subscriptions lock cost and compliance to one vendor. Writing needs cheap models for daily cleanup and stronger models for polish—and many people already have multiple API budgets or a company gateway.

How WriteX handles it

Pick a provider (DeepSeek, Kimi, OpenAI, Anthropic, GLM, Qwen, and more) or a compatible custom endpoint, paste your API key, and store it encrypted on device. WriteX forwards requests to your provider under their billing—we do not resell tokens. Switch models inside the same agent workflow by task.

Typical use cases

• Low-cost models for note tidy-up; stronger models for external drafts
• Route through a company-approved LLM gateway
• A/B tone and cost before you finalize

Works well with

Powers the AI agent for multi-file writing; fits local-first & security with no WriteX account. See Which models are supported?, Configure BYOK, and Get an API key.

Common questions

Are keys synced to the cloud? No—local encrypted storage only.

Is WriteX free? The app is free in public beta; model usage is billed by your provider—Is WriteX free?.