GOOGLE VS DEEPSEEK
Gemini 3.5 Flash vs DeepSeek V4 Flash
DeepSeek V4 Flash is about 19x cheaper than Gemini 3.5 Flash on a blended 3:1 input:output rate — the same 10K-in/2K-out request costs $0.002 vs $0.033. Gemini 3.5 Flash has the larger context window (1,048,576 vs 1,000,000 tokens).
Pricing verified
API pricing per 1M tokens
| Model | Input / 1M tokens | Output / 1M tokens | Blended (3:1 mix) |
|---|---|---|---|
| Gemini 3.5 Flash | $1.50 | $9.00 | $3.375 |
| DeepSeek V4 Flash | $0.14 | $0.28 | $0.175 |
Rates from official Google pricing and official DeepSeek pricing, checked 2026-08-11.
What a real workload costs
Example: one request with 10,000 input tokens and 2,000 output tokens, then that request at 100,000 runs per month.
| Model | Per request (10K in / 2K out) | Per month (100K requests) | Monthly delta |
|---|---|---|---|
| Gemini 3.5 Flash | $0.033 | $3,300 | +$3,104 |
| DeepSeek V4 Flash | $0.002 | $196 | — |
Model your own prompt sizes and volumes in the token cost analyzer, or check caching savings with the prompt caching calculator.
Specs side by side
| Spec | Gemini 3.5 Flash | DeepSeek V4 Flash |
|---|---|---|
| Provider | DeepSeek | |
| Context window | 1,048,576 tokens | 1,000,000 tokens |
| Model class | General text | General text |
| Tokenizer | Proprietary (counts estimated) | Proprietary (counts estimated) |
Count tokens for each model on its own page: Gemini 3.5 Flash token counter and DeepSeek V4 Flash token counter. All Google models are on the Gemini Token Counter. All DeepSeek models are on the DeepSeek Token Counter.
FAQ
Gemini 3.5 Flash vs DeepSeek V4 Flash FAQ
Which is cheaper, Gemini 3.5 Flash or DeepSeek V4 Flash?
DeepSeek V4 Flash is cheaper. At rates checked 2026-08-11, Gemini 3.5 Flash costs $1.50 input / $9.00 output per 1M tokens, while DeepSeek V4 Flash costs $0.14 input / $0.28 output — about a 19x difference on a typical 3:1 input-heavy workload.
How much does a real request cost on Gemini 3.5 Flash vs DeepSeek V4 Flash?
A request with 10,000 input tokens and 2,000 output tokens costs about $0.033 on Gemini 3.5 Flash and $0.002 on DeepSeek V4 Flash. At 100,000 such requests per month that is $3,300 vs $196 — a difference of $3,104 per month.
Which has the bigger context window, Gemini 3.5 Flash or DeepSeek V4 Flash?
Gemini 3.5 Flash. It supports 1,048,576 tokens of context versus 1,000,000 tokens — roughly 786,000 English words in one request.
Do Gemini 3.5 Flash and DeepSeek V4 Flash count tokens the same way?
Not exactly. Gemini 3.5 Flash uses a proprietary tokenizer (counts are estimates) and DeepSeek V4 Flash uses a proprietary tokenizer (counts are estimates). The same prompt will tokenize differently, which shifts effective cost per word.