DeepSeek V4 Flash is $1.87 cheaper per 1M input tokens (93.7% lower; 15.9x difference).
API cost decision in 10 seconds
🔥DeepSeek V4 Flash vs 🔥Gemini 3.1 Pro Preview
Pick DeepSeek V4 Flash when budget is the priority.
Pricing data updated:
Prices normalized to USD per 1M tokens
Sample workload: 1M input + 500K output
Budget verdict
Pick DeepSeek V4 Flash when budget is the priority.
On the standard 1M input plus 500K output workload, DeepSeek V4 Flash is estimated at $0.25 vs $8 for Gemini 3.1 Pro Preview, saving $7.75 (96.9% lower).
Cost-first pickDeepSeek V4 Flash
Context-first pickBoth models
Sample savings$7.7596.9%
10x traffic gap$77.48
The reported context window is tied, so cost and provider fit carry more weight. At 10x that traffic, the same price gap is about $77.48. Use the calculator below to replace the sample workload with your own token volume.
DeepSeek V4 Flash is $11.75 cheaper per 1M output tokens (97.9% lower; 47.6x difference).
Both models report the same context window at 1.05M tokens.
DeepSeek V4 Flash is $7.75 cheaper on the standard workload (96.9% lower).
Estimate your workload cost
Your Workload Cost
This estimate uses normalized public API pricing per 1M tokens. It is a planning aid, not a billing quote. Verify provider pricing, limits, and terms before production use.
Quick Decision
DeepSeek V4 Flash has the lower input price; DeepSeek V4 Flash has the lower output price; both models report the same context window. For the 1M input plus 500K output sample, DeepSeek V4 Flash is cheaper for the standard workload.
For a 1M input token plus 500K output token workload, the estimated API cost is $0.25 for DeepSeek V4 Flash and $8 for Gemini 3.1 Pro Preview.
Choose DeepSeek V4 Flash when you care most about lower input-token price, and lower output-token price.
Choose Gemini 3.1 Pro Preview when its provider, model quality, latency, or availability is more important than the numeric price/context winner.
- On the standard 1M input plus 500K output workload, DeepSeek V4 Flash is estimated at $0.25 vs $8 for Gemini 3.1 Pro Preview, saving $7.75 (96.9% lower).
- DeepSeek V4 Flash is $7.75 cheaper on the standard workload (96.9% lower).
- DeepSeek V4 Flash is $1.87 cheaper per 1M input tokens (93.7% lower; 15.9x difference).
- DeepSeek V4 Flash is $11.75 cheaper per 1M output tokens (97.9% lower; 47.6x difference).
- Both models report the same context window at 1.05M tokens.
| Feature | 🔥DeepSeek V4 Flash (DeepSeek) | 🔥Gemini 3.1 Pro Preview (Google) |
|---|---|---|
| Input Price prompt tokens per 1M | $0.126 | $2 |
| Completion Price per 1M tokens | $0.252 | $12 |
| Sample Workload Cost 1M input + 500K output | $0.25 | $8 |
| Context Window | 1.05M | 1.05M |
| Release Date | 2026-04-24 | 2026-02-19 |
| Popularity Rank current rank | #4 | #20 |
Use-Case Decision Matrix
| Use case | Better pick | Why |
|---|---|---|
| Budget-constrained production | DeepSeek V4 Flash | On the standard 1M input plus 500K output workload, DeepSeek V4 Flash is estimated at $0.25 vs $8 for Gemini 3.1 Pro Preview, saving $7.75 (96.9% lower). |
| High-volume input processing | DeepSeek V4 Flash | Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill. |
| Long responses and chatbots | DeepSeek V4 Flash | Lower output-token price matters most when assistants generate many completion tokens. |
| RAG or long-document work | Tie | A larger context window leaves more room for retrieved passages, conversation history, or source files. |
Related Alternatives
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Open Google modelsDeepSeek V4 Flash is an efficiency-optimized Mixture-of-Experts model from DeepSeek with 284B total parameters and 13B activated parameters, supporting a 1M-token context window. It is designed for fast inference and...
Gemini 3.1 Pro Preview is Google’s frontier reasoning model, delivering enhanced software engineering performance, improved agentic reliability, and more efficient token usage across complex workflows. Building on the multimodal foundation...