Comparison
AgentCost vs LiteLLM
LiteLLM is an open-source AI gateway and LLM proxy that gives you one interface across many providers, with routing, budgets, and rate limits.
These two are often compared but they sit at different layers, and the honest answer is that they complement each other more than they compete.
LiteLLM is a gateway: it normalizes 140+ providers behind one interface and handles routing, virtual keys, and rate limits. AgentCost is cost observability: it attributes spend to the agent that caused it. AgentCost's own pricing database is in fact synced from LiteLLM's — that's where the 3,500+ model prices come from.
AgentCost vs LiteLLM at a glance
| Feature | AgentCost | LiteLLM |
|---|---|---|
| Primary purpose | Cost attribution and optimization | Gateway and proxy — routing, keys, rate limits |
| Price | Free, MIT | Free Forever tier; Enterprise at custom pricing |
| License | MIT | MIT for the open-source gateway |
| Sits in the request path | No — instruments the SDK in-process | Yes — traffic is routed through the proxy |
| Per-agent attribution | First-class, via a context manager | Virtual keys, budgets, and teams |
| Provider coverage | OpenAI, Anthropic, Gemini, LangChain auto-instrumented | 140+ provider integrations |
| Enterprise extras | None — everything is included | SSO, RBAC, audit logs, JWT auth, support SLAs |
LiteLLM details read from their own pricing page on 2026-07-28. Pricing changes — check the source before deciding.
When to choose LiteLLM
- You need one interface across many model providers.
- You want routing, load balancing, or failover between models.
- You want to enforce budgets and rate limits at the gateway before a call is ever made.
- You need virtual API keys per team or customer.
When to choose AgentCost
- You already know which providers you're calling and just need to know what they cost you.
- You don't want a proxy hop added to every request.
- You want spend attributed per agent in a multi-agent system.
- You want cost dashboards and optimization suggestions rather than traffic control.
Frequently asked questions
Should I pick AgentCost or LiteLLM?
Usually neither instead of the other. LiteLLM controls how calls are routed; AgentCost reports what those calls cost and which agent caused them. Many teams run a gateway and a cost tracker together.
Does AgentCost work if my calls already go through LiteLLM?
AgentCost instruments the OpenAI, Anthropic, Gemini, and LangChain client libraries in your process. If your application calls those SDKs, tracking works regardless of where the request is ultimately routed.
Is AgentCost built on LiteLLM?
No, but it uses LiteLLM's continuously updated model pricing database as the source for its 3,500+ model prices, which is why cost calculations stay current.
Try AgentCost in two minutes
Free, MIT-licensed, self-hosted. No signup needed for the live demo.
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