How to Use DeepSeek-V4-Flash on B.AI for Free

DeepSeek-V4-Flash is now live on B.AI, and right now you can use it free with no limits. It handles coding, AI agents, long context, and high-concurrency workflows, and it works in both web chat and API.

That is free, unlimited access for a limited time, so it is worth grabbing before the offer closes.

Tutorial

1. Open http://b.ai/.
2. Log in to your account for web chat.
3. Select DeepSeek-V4-Flash from the model picker.
4. Open the API Dashboard for API access.
5. Choose Official Mode → Full Access.
6. Create an API key.
7. Copy the Model ID.
8. Start using the API.

Wrapping Up

You now have free, unlimited access to DeepSeek-V4-Flash on B.AI, both in chat and through the API. Use it for coding, agents, or long-context work before the limited-time offer runs out.