Fall back without changing your app contract You route across models by capability, health, latency, price, or application policy. A fallback preserves the typed contract and remains observable. go academy academy/topics/routing-fallback website/content-src/academy/course.mjs academy Fall back without changing your app contract
ax
Go github.com/ax-llm/ax/packages/go
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Unit 11 · Ship AI systems you can operate

Fall back without changing your app contract

You route across models by capability, health, latency, price, or application policy. A fallback preserves the typed contract and remains observable.

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Unit example (nearest native match)

See the idea in context

program := axllm.NewAx("text:string -> label:string", nil)
usage := program.GetUsage()
Run itIn your own project
go get github.com/ax-llm/ax/packages/go

import axllm "github.com/ax-llm/ax/packages/go"

client := axllm.NewAI("openai", map[string]axllm.Value{"apiKey": os.Getenv("OPENAI_API_KEY")})
classify := axllm.NewAx("review:string -> sentiment:class \"positive, negative, neutral\"", nil)

Set OPENAI_APIKEY in your environment before running provider-backed code.

In the ax repo

From a clone of the ax repo:

npm run example -- go src/examples/go/long-agents/smart_defaults_agent.go
Active practice

Show that you can use it

Answer 2 in a row to learn this · attempt 1
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