Head-to-head comparison
Mistral Large 4vsDeepSeek V4.1 Flash
Mistral Large 4 and DeepSeek V4.1 Flash are the two trillion-parameter-class open-weight flagships of autumn 2026, one European and one Chinese. Mistral is in API preview with weights promised by the end of October at $1.36/$4.18. DeepSeek shipped MIT weights on day one at $0.15/$0.60 off-peak and scores higher on the independent Artificial Analysis index.
At a glance
| Mistral Large 4 | DeepSeek V4.1 Flash | |
|---|---|---|
| Category | Chat | Chat |
| Function | Open-weight flagship | Open-weight model |
| Pricing | Paid | Freemium |
| Starting price | $1.36 / $4.18 per million tokens (launch sale $0.68 / $2.09); cached $0.14 | Open weights free; API $0.15 / $0.60 per million tokens off-peak (double at peak), cache hits $0.003 |
| Released | October 2026 | September 2026 |
Mistral Large 4
Pros
- Flagship-class open weights from a European lab
- Priced well under the $2/$10 tier
- Vision built in
Cons
- Weights not yet downloadable at preview
- Independent index places it behind GLM-5.3, Kimi K3, and DeepSeek V4.1 Flash
- Context window figures disagree between Mistral and evaluators
DeepSeek V4.1 Flash
Pros
- The most permissive licence in the 500B+ class at release
- Very low API prices even after the September increase
- Vision without a separate model
Cons
- Self-hosting a ~750B model is out of reach for most teams
- Peak-hour pricing is double
- Chinese-hosted API considerations for data
Which one should you pick?
Pick Mistral Large 4 if
You need a European provider or EU hosting, want a vendor with enterprise contracts and support, or plan to self-host once the weights land.
See Mistral Large 4 details →Pick DeepSeek V4.1 Flash if
Cost per token dominates, you need weights today, you want native vision at the lowest price, or your workload tolerates a Chinese-hosted API.
See DeepSeek V4.1 Flash details →Bottom line
DeepSeek V4.1 Flash is cheaper, open now, and ranks higher independently. Mistral Large 4 is the choice when jurisdiction and vendor relationship matter more than price. Re-check once Mistral's weights are public.