DeepSeek V4.1 Flash vs Gemini 3.8 Flash
DeepSeek V4.1 Flash (DeepSeek) vs Gemini 3.8 Flash (Google), compared on price, context, speed and Arabic support. Both run on thalam through one OpenAI-compatible API, so you can switch between them with a single model id change. At a glance, DeepSeek V4.1 Flash is the cheaper option.
Specs side by side
| Spec | DeepSeek V4.1 Flash | Gemini 3.8 Flash |
|---|---|---|
| Provider | DeepSeek | |
| Type | Text | Text |
| Context window | 1M | 1M |
| Max output | 384K | 64K |
| Input price | $0.300 / 1M | $1.50 / 1M |
| Output price | $1.20 / 1M | $7.50 / 1M |
| Speed | Fast | Fast |
| Arabic support | Strong | Strong |
Which should you choose?
- Lower cost, about 5× cheaper ($0.300 / 1M)
- Google's most capable Flash yet, built on 3.7 for software engineering and autonomous agents. Tops Terminal-bench 2.1 at 89.4% and lifts DeepSWE to 73.7%, with a 1M-token context at the same price as 3.7
One OpenAI-compatible endpoint, one bill. Switch between them with a single model id change, pay per use, credits never expire.
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FAQ
What's the difference between DeepSeek V4.1 Flash and Gemini 3.8 Flash?
DeepSeek V4.1 Flash costs less ($0.300 / 1M vs $1.50 / 1M). Both are available on thalam behind one OpenAI-compatible API.
Is DeepSeek V4.1 Flash or Gemini 3.8 Flash cheaper?
DeepSeek V4.1 Flash is cheaper on input ($0.300 / 1M vs $1.50 / 1M). On thalam you pay per use, so you can route cheap-by-default and fall back to the other only when needed.
Can I use both DeepSeek V4.1 Flash and Gemini 3.8 Flash with one API key?
Yes. thalam is OpenAI-compatible, so both models are reachable through the same endpoint. Switching between them is a one-line model id change, no code rewrite.