Physix FrontierPhysix Frontier · News Briefing Card (enbrief · Sep 12, 2026)
DeepSeek Keeps V4 Pro API Online at Original Price
KEY FACTS
- DeepSeek will continue offering the V4 Pro API service after September 14, 2026.
- The official pricing structure for V4 Pro remains unchanged despite the new model launch.
- The previous plan to route V4 Pro requests to V4.1 Flash with new billing rates has been shelved.
- DeepSeek released the natively multimodal V4.1 Flash model on September 10.
KEY DATA
2026-09-14Original Sunset Date
2026-09-10New Model Release Date
PHYSIX OBSERVATION
DeepSeek's decision to retain the legacy V4 Pro alongside the more powerful V4.1 Flash reflects a cautious balance between aggressive technical iteration and user migration costs. While this ensures continuity for existing workloads, it also implies that the new model has not yet fully replaced the old architecture in terms of compatibility or stability for specific scenarios, requiring developers to monitor future version transition rhythms closely.
Source: enbrief original report ↗