DeepSeek v4.1 Flash is now available for internal beta testing

dares2573 19 points 7 comments September 08, 2026
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DeepSeek V4.1 Flash is now available for internal beta testing. It uses a new model architecture, with native multimodal support, stronger capabilities, faster speed, and lower cost. Keep the `base_url` unchanged and set the model name to `deepseek-v4.1-flash-expires-on-0910` to use it. Pricing is currently the same as `deepseek-v4-flash`, with an account-level rate limit of 20 concurrent requests.

Discussion Highlights (4 comments)

GilbertWong

Where can I test it ?

lalitmadan

can't wait to test it out :P

dyl000

lower cost lol how -- effective price is like 4 cents / m in on openrouter with cache hits.

damanamathos

Wow, it's fast.

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