Fail-open wrapper around the OpenAI SDK. Optimize through Varsten when it is healthy; fall back directly to your provider when Varsten is unavailable, so an outage costs you savings, not uptime.

Fail-open wrapper around the Google Gen AI SDK. Optimize through Varsten when it is healthy; fall back directly to Gemini when Varsten is unavailable, so an outage costs you savings, not uptime.

Fail-open wrapper around the Anthropic SDK. Optimize through Varsten when it is healthy; fall back directly to Anthropic when Varsten is unavailable, so an outage costs you savings, not uptime.

Provider-agnostic fail-open engine shared by Varsten's SDK wrappers: fallback decisions, the local circuit breaker, error taxonomy, and best-effort telemetry.