DeepSeek launches V4-Flash API in public beta with agent upgrades

V4-Flash scored 82.7 on Terminal Bench 2.1 and 54.4 on DeepSWE, per DeepSeek. The model keeps the same 13B active parameters, adds native Responses API and Codex support, and beats the 49B-active V4-Pro-Preview on agentic work. Weights released as DeepSeek-V4-Flash-0731 on Hugging Face.