DeepSeek V4 Flash vs Gemini 3.5 Flash-Lite
DeepSeek against Google, costed on the same three workloads. Neither is cheaper everywhere — which one wins depends on how much you read versus write.
Monthly bill, side by side
| Workload | DeepSeek V4 Flash | Gemini 3.5 Flash-Lite | Difference |
|---|---|---|---|
| Support chatbot 2,500 six-turn conversations a day |
$1,416 | $1,613 | $198 (+14%) |
| Document summariser 1,000 single-shot summaries a day |
$193 | $170 | $22.92 (+13%) |
| Coding agent 200 twelve-turn sessions a day |
$1,077 | $1,022 | $54.72 (+5%) |
No prompt caching and no batch discount on either side, so the comparison is like for like. Both figures assume 30 days a month.
The rate cards
| DeepSeek V4 Flash | Gemini 3.5 Flash-Lite | |
|---|---|---|
| Input, per 1M tokens | $0.44 | $0.3 |
| Output, per 1M tokens | $1.32 | $2.5 |
| Cached input | $0.014 | $0.03 |
| Context window | 1M | 1.05M |
| Maximum output | 384K | 66K |
| Reasoning model | yes | yes |
| Vision | no | yes |
Run this comparison on your own numbers
Full detail: DeepSeek V4 Flash pricing · Gemini 3.5 Flash-Lite pricing