DeepSeek V4 Pro vs Gemini 3.5 Flash
API pricing, context window and capabilities for DeepSeek V4 Pro and Gemini 3.5 Flash, side by side. Prices are the cheapest serving route per 1M tokens, verified against LiteLLM and OpenRouter.
Verdict
computed from the published numbersDeepSeek V4 Pro wins on price. Gemini 3.5 Flash wins on coding and on intelligence.
Price
DeepSeek V4 Pro
Coding
Gemini 3.5 Flash
Intelligence
Gemini 3.5 Flash
Context window
Tied
Key takeaways
who wins on what, from the published numbersDeepSeek V4 Pro wins
- Cheaper input ($0.43 vs $1.50 /1M)
- Cheaper output ($0.87 vs $9.00 /1M)
- Higher max output (384K vs 66K)
- More serving providers (4 vs 3)
Gemini 3.5 Flash wins
- Supports vision
- Supports audio
- Has web search
Cheaper overall
DeepSeek V4 Pro
$0.43 + $0.87 /1M
Larger context
Tied
More providers
DeepSeek V4 Pro
4 providers
Pricing & specs
cheapest serving route · per 1M tokens| DeepSeek V4 Pro | Gemini 3.5 Flash | |
|---|---|---|
| Input $/1M | $0.43 best | $1.50 |
| Output $/1M | $0.87 best | $9.00 |
| Context window | 1M | 1M |
| Max output | 384K best | 66K |
| Serving providers | 4 best | 3 |
| Released | 2026-04-24 | 2026-05-22 |
Benchmarks
Artificial Analysis indices, side by side| DeepSeek V4 Pro | Gemini 3.5 Flash | |
|---|---|---|
| Intelligence | 44.3 | 50.2 best |
| Coding | 59.4 | 70.1 best |
| GPQA Diamond | 89% | 92% best |
| Output speed | 75 t/s | 188 t/s best |
| Latency (TTFT) | 7.80s best | 18.79s |
Cost calculator
choose a serving route for each sideInput tokens / month
Output tokens / month
DeepSeek V4 Pro
via Tencent
$3.04
Gemini 3.5 Flash
via Vertex AI
$17
Capabilities
feature support, side by side| Feature | DeepSeek V4 Pro | Gemini 3.5 Flash |
|---|---|---|
| Vision | — | ✓ |
| Tool use | ✓ | ✓ |
| Reasoning | ✓ | ✓ |
| Audio | — | ✓ |
| Prompt caching | ✓ | ✓ |
| Structured output | ✓ | ✓ |
| Web search | — | ✓ |
Related comparisons
Frequently asked questions
Which is cheaper, DeepSeek V4 Pro or Gemini 3.5 Flash?
DeepSeek V4 Pro is cheaper for input ($0.43 vs $1.50 per 1M tokens). DeepSeek V4 Pro is cheaper for output ($0.87 vs $9.00 per 1M tokens).
What is the context window difference between DeepSeek V4 Pro and Gemini 3.5 Flash?
Both DeepSeek V4 Pro and Gemini 3.5 Flash have about a 1M-token context window.
How do DeepSeek V4 Pro and Gemini 3.5 Flash compare on benchmarks?
On the tracked Artificial Analysis indices, Gemini 3.5 Flash leads on coding, and Gemini 3.5 Flash leads on intelligence.
Pricing verified against LiteLLM + OpenRouter + provider pages · refreshed daily
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