DeepSeek-V4 Flash 0731 vs GPT-5.6 Luna on DeepSWE: Cost and Coding

En 30 secondes

Ce qui s'est passé

DeepSeek-V4 Flash costs six times less than GPT-5.6 Luna on coding tasks but solves fewer problems alone. A cascade using DeepSeek first beats both models individually.

Pourquoi ça compte

Engineering teams evaluating cost-effective AI coding assistance should consider this when balancing accuracy requirements against budget constraints and task complexity.

Vigilance

DeepSeek performs poorly on JavaScript and reasoning-heavy tasks. The cascade strategy requires a test suite to validate solutions before escalating to Luna.