Blog · Jun 7, 2026

Gemini 3.5 Flash vs DeepSeek V4 Pro: Google's Latest Meets Budget Champion

DeepSeek V4 Pro costs 71% less on input and 90% less on output — both with 1M context. Here's the full cost breakdown.

The Price Gap Is Staggering

Google just released Gemini 3.5 Flash at $1.50/$9.00 per 1M tokens. It's a solid mid-tier model with 1M context. But DeepSeek V4 Pro — which has been available for weeks — costs just $0.435/$0.87 with the same 1M context window.

That means DeepSeek V4 Pro is 71% cheaper on input and 90% cheaper on output. For the same workload, you'd pay 3-10x more on Gemini 3.5 Flash.

When Gemini 3.5 Flash Makes Sense

Despite the massive price gap, Gemini 3.5 Flash has real advantages:

• Google Cloud integration — Native support in Vertex AI, BigQuery ML, Cloud Functions
• Enterprise compliance — SOC 2, HIPAA BAA, ISO 27001 certifications
• Generous free tier — Experiment without spending a dime
• US-based support — Enterprise SLAs and dedicated support channels
• Multimodal capabilities — Native image and video understanding

When DeepSeek V4 Pro Wins

For most developers, DeepSeek V4 Pro is the obvious choice:

• Cost-sensitive workloads — 89% cheaper at scale
• High-volume applications — Chatbots, classification, content generation
• Startups and indie devs — Every dollar counts
• Open-weight flexibility — Self-host if needed

The Bottom Line

If you're building on Google Cloud and need enterprise compliance, Gemini 3.5 Flash is a solid choice. But for pure cost-efficiency, DeepSeek V4 Pro delivers comparable quality at a fraction of the price.

At 1,000 requests/day, you'd save over $1,900 per year by choosing DeepSeek V4 Pro over Gemini 3.5 Flash. That's real money for any team.