AI & Data
Lexicon AI Legal Research Copilot
Enterprise RAG system summarizing thousands of contract precedents and litigation transcripts with citation verification.
Project Background
Lexicon needed an intelligent legal assistant to help attorneys cross-reference case law, identify non-standard indemnity clauses, and generate contract summaries while strictly keeping sensitive litigation documents private.
Measurable Outcomes & Production Impact
65%Time Saved per Brief
99.4%Citation Accuracy
2.5M+Indexed Documents
100% On-PremiseZero Data Leaks
The Engineering Challenge
General commercial LLMs hallucinated case citations and violated client confidentiality guidelines regarding third-party model training.
Architectural Solution
We deployed dedicated self-hosted open-weights models connected via hybrid vector-keyword retrieval with cryptographic audit trails and paragraph-level source attribution.
Production Results
Reduced preliminary contract review time from 6 hours to under 45 minutes.
Adopted by over 320 practicing partners and paralegals in the firm.
Achieved zero hallucinations through strict citation grounding guardrails.
Engagement Metadata
Client OrganizationLexicon Partners Law Group (Sample Client)
Delivery Year2025
Project Duration3.5 Months
Classification
AI & Data
Architecture & Stack
PythonFastAPILangChainPineconeNext.jsTailwind CSS