> Raw Markdown twin (generated at build time from the source Markdown). Rendered page: https://docs.gatellm.io/en/usecases/index · Doc index: https://docs.gatellm.io/en/llms.txt


# Use case overview

This group of pages is organized by "what you want to achieve," tying the gateway's relevant capabilities into actionable solutions. Each page points to specific how-to guides and configuration references — they are not dead-end pages.

Not sure where to start? Go back to the [solutions-by-goal table](/en/index.md) on the documentation home page, or first get [Docker single node](/en/quickstart/docker-single-node.md) running and then branch by goal.

| Use case | For | Difficulty | What it solves |
|------|------|------|----------|
| [Enhance model capability](/en/usecases/model-enhancement.md) | Administrator | Intermediate | Fill model gaps: auto-switch image-bearing requests to a multimodal model, swap in a cost-effective model during Claude Code's execution phase, multi-model consensus for PR code review |
| [Reduce call cost](/en/usecases/cost-reduction.md) | Administrator | Intermediate | Use upstream prompt caching, model tiered routing, response trimming, and log retention policy to cut gateway-side call cost |
| [Achieve high availability](/en/usecases/high-availability.md) | Administrator | Intermediate | Use a load balancer for multi-node failover, provider-level disaster recovery, multi-instance shared state, and canary shutdown |
| [Multi-tenant isolation](/en/usecases/multi-tenant-isolation.md) | Administrator | Advanced | Use key groups to split models and load balancers, use request-header rules to distinguish clients, per-tenant rate limiting and billing |
| [Office / Microsoft 365 add-in](/en/usecases/office-m365-addin.md) | Administrator | Advanced | Self-host the Office add-in on your own origin so users connect directly to your own gateway inside Excel / Word / PPT / Outlook, with zero dependency on pivot |
| [Meet compliance and audit requirements](/en/usecases/compliance-audit.md) | Administrator | Advanced | Request and response retention, two-layer sensitive-information redaction, login and permission audit, retention period and deletion |
| [Troubleshoot from symptoms](/en/usecases/troubleshooting.md) | Integrator + Administrator | Intermediate | Use `z-request-id` to locate 401 / 403 / 404 / 502 / 503 / timeout / streaming interruption / memory anomaly symptoms |