DeepSeek V4 Flash as a Labs experiment, open for a short test window: temporary, not a permanent id. DeepSeek's fast agentic coding MoE (284B total, 13B active), served from the official 0731 release, on a 1M-token context. Reasoning has four modes: non-think (none), think low (low, the default), think high (high) and think max (max). Access is seat-gated through the Labs page while an experiment is live. It is offered at limited capacity and availability, so expect it to be flaky and to go down under load: crash it, give it a moment, and try again. When the window ends, the model keeps serving as the pay-per-token umans-deepseek-v4-flash-0731.