Claude Opus 4.8 vs DeepSeek V4 Flash 0731
Claude Opus 4.8 (Anthropic) vs DeepSeek V4 Flash 0731 (DeepSeek), 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 and DeepSeek V4 Flash 0731 is rated faster.
Specs side by side
| Spec | Claude Opus 4.8 | DeepSeek V4 Flash 0731 |
|---|---|---|
| Provider | Anthropic | DeepSeek |
| Type | Text | Text |
| Context window | 1M | 1M |
| Max output | 128K | 384K |
| Input price | $5.00 / 1M | $0.140 / 1M |
| Output price | $25.00 / 1M | $0.280 / 1M |
| Speed | Medium | Fast |
| Arabic support | Strong | Partial |
Which should you choose?
- Stronger Arabic support for Gulf and MENA use
- Lower cost, about 35.7× cheaper ($0.140 / 1M)
- Rated faster (Fast) for latency-sensitive workloads
One OpenAI-compatible endpoint, one bill. Switch between them with a single model id change, pay per use, credits never expire.
Related comparisons
FAQ
What's the difference between Claude Opus 4.8 and DeepSeek V4 Flash 0731?
DeepSeek V4 Flash 0731 costs less ($0.140 / 1M vs $5.00 / 1M); DeepSeek V4 Flash 0731 is rated faster; Claude Opus 4.8 has stronger Arabic support. Both are available on thalam behind one OpenAI-compatible API.
Is Claude Opus 4.8 or DeepSeek V4 Flash 0731 cheaper?
DeepSeek V4 Flash 0731 is cheaper on input ($0.140 / 1M vs $5.00 / 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 Claude Opus 4.8 and DeepSeek V4 Flash 0731 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.