DataFunTalk

Aug 13, 2026 · Artificial Intelligence

Overnight DeepSeek V4 Pro Test Reveals Disappointing Performance – Not Fit for Codex

After integrating the newly released DeepSeek V4 Pro into Codex and running 41 million tokens, the author finds the model’s silent operation, excessive context copying, weak frontend and writing abilities, and higher latency make it unsuitable as a primary model despite solid throughput and low cost.