A bar fills towards the model's side; yellow is a clear difference, grey falls within the margin of measurement.
| Criterion | GLM (Z.ai) | Le Chat (Mistral) |
|---|---|---|
| Quality (Elo)Quality from blind duels on LMArena: users choose between two anonymous answers. A difference of about 20 points is noticeable, a few points is noise. How we measure | 1483 | 1426 |
| Editorial scoreOur own assessment on 10 of suitability for professional work, price and privacy. This is a judgement, not a measurement; that is why it always sits alongside the Elo. How we measure | 7,7 / 10 | 8,4 / 10 |
| Code EloThe same blind duels on LMArena, but only with programming tasks. How we measure | 1622 | 1563 |
| API price in, per 1M | $0.07 | $0.7 |
| API price out, per 1M | $1.4 | $2.1 |
| Entry price (subscription) | $18 / month | $14.99 / month |
| Business | on request | from $24.99 / seat (Team / API / Enterprise) |
| Context window | 1M tokens | 256K tokens |
| Modalities | Text, Image | Text, Image, Code, Speech |
| EU hosting | No | Yes |
| Self-hostable | Yes | Yes |
| No training (business) | No | Yes |
| GDPR profileOur summary of what the provider itself publishes about your data. For a professional tool: whether the data is stored in the EU, whether there is a certification or GDPR guarantee, and whether the provider is based in the Netherlands or the EU. For a general model: EU hosting, no training on your data and self-hosting. From Strong to Unknown; Caution only for a model with a documented problem. How we measure | Caution | Strong |
Source: LMArena, OpenRouter · retrieved 9 November 2026
Choose GLM (Z.ai) if…
- top performance on coding and agent benchmarks at a fraction of the price matters to you
- a fully open-weight GLM-5.2 under the MIT licence matters to you
- you want the highest overall quality
Choose Le Chat (Mistral) if…
- being European and GDPR-native (Paris, CNIL) matters to you
- open weights (Apache 2.0) and no lock-in matter to you
- privacy and GDPR weigh heavily
- price is a decisive factor
Frequently asked questions
By field
Which is better: GLM (Z.ai) or Le Chat (Mistral)?
On combined quality (LMArena Elo + our editorial score), GLM (Z.ai) comes out higher, but the right choice depends on your field and requirements: Le Chat (Mistral) may suit you better on price or privacy. See the table above.
Which is better for privacy and GDPR: GLM (Z.ai) or Le Chat (Mistral)?
Le Chat (Mistral) scores more strongly here (EU hosting, on-premise and no training on your data). GLM (Z.ai): The international service Z.ai runs through JINGSHENG HENGXING TECHNOLOGY PTE. LTD. (Singapore); personal data is in principle processed in Singapore. According to the data processing agreement, API content is processed in real time and not stored. GLM-5.2 is open-weight under MIT and can therefore be fully self-hosted or hosted via an EU provider.
Which is cheaper: GLM (Z.ai) or Le Chat (Mistral)?
Le Chat (Mistral) has the lowest entry price. Always check current prices, as they change often.
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