DeepSeek V4 Flash 0731 vs Grok 4.3
DeepSeek V4 Flash 0731 (DeepSeek) vs Grok 4.3 (xAI), 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 Flash 0731 is the cheaper option.
Specs side by side
| Spec | DeepSeek V4 Flash 0731 | Grok 4.3 |
|---|---|---|
| Provider | DeepSeek | xAI |
| Type | Text | Text |
| Context window | 1M | 1M |
| Max output | 384K | 400K |
| Input price | $0.140 / 1M | $1.25 / 1M |
| Output price | $0.280 / 1M | $2.50 / 1M |
| Speed | Fast | Fast |
| Arabic support | Partial | Partial |
Which should you choose?
- Lower cost, about 8.9× cheaper ($0.140 / 1M)
- xAI's flagship Grok 4.3. Fast, low-hallucination reasoning with strong agentic tool-calling, 1M context, and real-time knowledge
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 Flash 0731 and Grok 4.3?
DeepSeek V4 Flash 0731 costs less ($0.140 / 1M vs $1.25 / 1M). Both are available on thalam behind one OpenAI-compatible API.
Is DeepSeek V4 Flash 0731 or Grok 4.3 cheaper?
DeepSeek V4 Flash 0731 is cheaper on input ($0.140 / 1M vs $1.25 / 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 Flash 0731 and Grok 4.3 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.