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// Software stack

Multi-model gateway

One API to switch models, fail over and control cost.

3 pieces4 setup stepsscenario: Control AI costs and usage limits

What goes in it

  1. 1

    OpenRouter Model gateways, routing & usage Closed / commercial

    Gateway

    Unified API gateway to hundreds of models with pay-as-you-go billing.

    Or: OmniRoute · llm-gateway · axonhub · experiential · fal

  2. 2

    freellmapi Model gateways, routing & usage Open source

    Free aggregator

    OpenAI-compatible proxy stacking free tiers of 16 LLM providers.

    Or: free-claude-code

    ★ 39k
  3. 3

    langwatch Observability & tracing Open source

    Usage tracking

    Open-source agent observability and evals.

    Or: latitude-llm

    ★ 5.0k

How to set it up

  1. 01Standardise on the OpenAI-compatible API
  2. 02Configure routing and budgets
  3. 03Log tokens and error codes
  4. 04Give agents read-only keys

Similar stacks: what’s different

Data updated: AI software & hot ranks · Solutions & stack guides(UTC+8)