DeepSeek V4 Review 2026: 50x Cheaper Than GPT-5.4?
DeepSeek V4-Pro, released April 24, 2026 under an MIT license, tops LiveCodeBench at 93.5% and costs $1.74/M input tokens — roughly 70-80x less than GPT-5.4 Pro’s $30/M. For most coding workloads, it’s the strongest cost-performance trade-off available today. What Is DeepSeek V4? (April 2026 Release Overview) DeepSeek V4 is a family of large language models released on April 24, 2026 by DeepSeek, a Chinese AI research lab. The family includes two variants: V4-Pro, a 1.6 trillion-parameter Mixture-of-Experts (MoE) model with 49 billion active parameters per token, and V4-Flash, a lighter 284 billion-parameter model with 13 billion active parameters. Both models support a 1 million token context window and are released under an MIT open-source license, making them freely available on Hugging Face for self-hosted deployments. DeepSeek has also merged its prior “R” (reasoning) series into V4, which means both variants ship with switchable thinking mode — you can toggle extended chain-of-thought reasoning on or off per request. NIST’s CAISI evaluation published in May 2026 found V4-Pro performs comparably to GPT-5, a model released roughly eight months earlier. The MIT license combined with Hugging Face availability fundamentally changes the economics for enterprises that can run inference in-house: the hosted API price advantage becomes a floor, not a ceiling. ...