DeepSeek V4 - almost on the frontier, a fraction of the price

DeepSeek released two new preview models, DeepSeek-V4-Pro and DeepSeek-V4-Flash, which use a Mixture of Experts architecture (a design where only some parts of the model activate for each task) and support 1 million token context (the amount of text the model can consider at once). These models are significantly cheaper than competitors like GPT and Claude, with DeepSeek-V4-Flash costing $0.14 per million input tokens compared to $0.20 for GPT-5.4 Nano, because DeepSeek focused on efficiency improvements that reduced computational requirements.