External LLMs You Can Integrate INTO ServiceNow

ServiceNow supports integration with various external LLM providers via AI Connectors:

Some popular Integrations are listed below:

• OpenAI (GPT-4, GPT-4o, GPT-3.5-Turbo)
• Google Gemini (Gemini Pro, Gemini Ultra)
• Microsoft Azure OpenAI (enterprise deployments)
• Anthropic Claude (various versions)
• Custom/On-Premise Models (via REST API connectors)

Where are they used: Flow Designer, Virtual Agent skills, custom scripted workflows, AI Search enhancement

 

ServiceNow's Own LLM: NowLLM

ServiceNow Now LLM is a proprietary, domain-specific Large Language Model developed by ServiceNow. It is custom-built to understand enterprise workflows and securely automate platform tasks—such as incident summarization, code generation, and intelligent virtual agent responses—without risking corporate data privacy.

Core Architecture

• Specialized Design: Unlike general-purpose models (like standard ChatGPT), Now LLM is specifically optimized for business, HR, and IT workflows. It is built upon the GPT-43B architecture and specialized encoder-decoder mechanisms.

• Integrated Ecosystem: It forms the backbone of ServiceNow's Now Assist features, providing in-platform capabilities rather than acting as a standalone chatbot, which includes the following Now Assist Components:

• Now Assist for IT Service Management 

• Now Assist for Field Service 

• Now Assist for Virtual Agent — conversational workflows

• Agentic AI & AI Agents — autonomous workflow execution

• AI Search — semantic search across enterprise data

• Skill Kit — build agentic reasoning capabilities

NowLLM vs. Third-Party LLMs

Choosing between the native model and external providers depends heavily on your specific business requirements, workflows, and governance.

 

Feature / Criteria	Native NowLLM	Third-Party LLMs (Azure OpenAI, Claude, Gemini)
Best For	Out-of-the-box (OOTB) ServiceNow workflows (ITSM, HRSD, CSM).	Cross-platform orchestration and complex, multi-step custom logic.
Data Context	Pre-trained specifically on domain-specific IT and enterprise service data.	General-purpose, though highly versatile across broader non-ServiceNow data.
Setup & Maintenance	ServiceNow Now Assist licensed; automatically patched and updated.	Requires a Bring-Your-Own-Key (BYOK) setup, API management, and external billing.
Security & Privacy	Strict in-platform data governance, data masking, and compliance tracking built-in.	Requires aligning your corporate external cloud guardrails with ServiceNow.

 

Conclusion

Use NowLLM for quick value, less maintenance, and seamless handling of incidents, knowledge base generation, or chat summaries. Opt for a Third-Party LLM if your enterprise has an existing, heavily-tailored global AI architecture or requires advanced agentic orchestration spanning external platforms

 

Disclaimer: Any opinions expressed here are my personal views and should not be attributed to any organization with which I am associated.