China’s DeepSeek has a habit of showing up, uninvited, to Silicon Valley’s AI party, and this time, it has done so with the long-awaited V4 preview. The Hangzhou-based company has released its latest AI model, which beats popular American models in certain areas.
DeepSeek has launched two new models: V4-Pro (Expert mode) and V4-Flash (Instant mode). While the former is a massive 1.6 trillion parameter model, the latter is at a more manageable 284 billion parameters. However, both of them have a one-million-token context window.
🚀 DeepSeek-V4 Preview is officially live & open-sourced! Welcome to the era of cost-effective 1M context length.
🔹 DeepSeek-V4-Pro: 1.6T total / 49B active params. Performance rivaling the world’s top closed-source models.
🔹 DeepSeek-V4-Flash: 284B total / 13B active params.… pic.twitter.com/n1AgwMIymu
— DeepSeek (@deepseek_ai) April 24, 2026
What exactly did DeepSeek release?
What’s even more important is that both models are open source, meaning they’re available
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