DeepSeek v4 vs GPT-5.5 vs Claude 3.7: which one should you actually use for production?

The author evaluates the recent DeepSeek v4, GPT-5.5, and Claude 3.7 model launches for production use, critiquing reliance on benchmarks that don't reflect real-world performance on specific tasks. He emphasizes the importance of consistency, token efficiency, and behavior under load for practical applications.