Lex by Lexion

Done right. Built for intake. Designed for growth.

Meet LexThe highest-performing AI agent for law firms

Why Lex

Most Agents are built for everything.
Lex is built for law.

Generic AI tools confuse visitors, give bad advice, and capture nothing useful. Lex was designed ground-up for legal intake — with structured qualification flows, safe response guardrails, and direct delivery to your team. The result is a faster, cleaner pipeline with less effort from you.

Capabilities

Everything a Legal
AI Agent should do.

01

Instant Visitor Engagement

Zero response latency

Lex greets every visitor the moment they arrive — day or night, weekday or weekend. No delays, no missed windows. First impressions are made in milliseconds.

02

Legal Intake Qualification

Smart, structured questioning

Lex asks the right questions in the right order — case type, jurisdiction, timeline, injuries — filtering unqualified leads before they ever reach your calendar.

03

Multilingual Communication

No client left behind

Lex detects the visitor's language and responds fluently. Serve Spanish, French, Arabic, and dozens of other language speakers without adding a single staff member.

04

Structured Lead Delivery

Ready-to-contact packages

Every qualified conversation ends with a complete lead card: name, contact info, case summary, urgency level — sent instantly to your inbox or CRM.

05

Escalation and Handoff

Human when it matters

When a visitor signals high urgency or distress, Lex surfaces a warm handoff prompt and notifies your team in real time — so no critical case slips through the cracks.

06

Continuous Learning

Gets better every week

Lex improves from every conversation. Our team reviews edge cases, refines responses, and trains on your firm's specific practice areas — no extra effort required from you.

AI Intelligence

The model powering Lex
outperforms every competitor.

Lex is benchmarked head-to-head against GPT-4o, Claude Opus 4, DeepSeek V3, and Kimi K2 across reasoning, knowledge, coding, and factual recall.

Reasoning

AIME 2025

Advanced math olympiad — the hardest public reasoning benchmark. Lex scores nearly 3× GPT-4o.

Lex
70.3
Kimi K2
49.5
DeepSeek V3
46.6
Claude Opus 4
33.9
GPT-4o
26.7
Higher is better · Score out of 100
Expert Knowledge

GPQA Diamond

PhD-level science questions in biology, chemistry, and physics. Lex beats GPT-4o by 10.6 points.

Lex
77.5
Claude Opus 4
74.9
Kimi K2
75.1
DeepSeek V3
68.4
GPT-4o
66.9
Higher is better · Score out of 100
Overview

Capability Radar

Lex holds the largest footprint across all five dimensions simultaneously.

LexGPT-4oClaude Opus 4DeepSeek V3Kimi K2
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* Long Context score is a normalized composite from public recall benchmarks.

Positioning

Power vs. Efficiency

Lex sits top-right — elite reasoning with best-in-class cost efficiency. No other model comes close on both axes.

LexGPT-4oClaude Opus 4DeepSeek V3Kimi K2
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High Power · High EfficiencyLow Power · Low Efficiency

Bubble size reflects relative model scale. Efficiency score is a composite of API cost per token and throughput.

Bottom line: Lex's underlying model leads on AIME reasoning (70.3), factual recall (84.3 CSimpleQA), and GPQA expert knowledge (77.5) — while remaining significantly more cost-efficient than GPT-4o or Claude Opus 4. That means faster, smarter intake conversations and a lower cost per qualified lead for your firm.

Performance

Lex vs. the average
law firm intake.

Industry benchmarks drawn from a study of 200+ U.S. law firms, compared against Lexion pilot results.

Response time

Lex
< 1 second
Avg
~48 hours

Lead qualification rate

Lex
92%
Avg
45%

After-hours coverage

Lex
24 / 7
Avg
0%

Contact info captured

Lex
100%
Avg
38%

FAQ

Questions
about Lex.

Everything you need to know before adding Lex to your firm's website.

How long does it take to set Lex up on my website?

Will Lex give legal advice to visitors?

Can I customize what Lex says?

What happens to the conversation data?

What if a visitor has an urgent situation?

Pilot · 3 spots remaining

Add Lex to your site.Keep every lead.

Join the pilot program — free setup, free first month, and direct access to our team. You provide feedback, we handle everything else.

No credit card. No commitment. No technical work from you.