Lexiel vs ChatGPT for lawyers: key differences for Spanish law (2025)
ChatGPT is general-purpose. Lexiel is an AI specialized in Spanish law. What we measured, how to check citations, client data (GDPR) and integrated firm management.
What we can verify
This guide replaces an earlier version that quoted a ChatGPT figure without a source. We removed it.
1. Accuracy: what we measured
| Tool | Spanish Bar Access Exam, 152 questions (July 2026) |
|---|---|
| Lexiel (with RAG, July 2026) | 149/152, 98.0% |
We have not measured other ChatGPT versions. Raw data on the benchmark page.
2. Citations linked to the source
A general model can generate citations that do not exist: check each one on the BOE or CENDOJ. Lexiel checks citations against the BOE, CENDOJ and its corpus and flags those it cannot confirm, with a link to the official source. No tool is error-free.
3. Client data
Before using any tool with client data, review its data processing agreement (GDPR Art. 28) and where data is processed. Lexiel stores data in the EU (Germany), anonymizes personal data before sending it to its AI providers (in the US, under Standard Contractual Clauses) and does not train models on user data.
4. Integrated firm management
Lexiel adds legal research, case files, CRM, VeriFactu billing and a client portal, from €52/month + VAT.
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