model routing: cost/latency ranking with ranked fallback list#849
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adilhafeez merged 13 commits intomainfrom Mar 30, 2026
Merged
model routing: cost/latency ranking with ranked fallback list#849adilhafeez merged 13 commits intomainfrom
adilhafeez merged 13 commits intomainfrom
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…urn ranked model list
- MetricsSource::DigitalOceanPricing variant: fetch public DO Gen-AI pricing, normalize as lowercase(creator)/model_id, cost = input + output per million
- cost_metrics endpoint format updated to { "model": { "input_per_million": X, "output_per_million": Y } }
- Startup errors: prefer:cheapest requires cost source, prefer:fastest requires prometheus
- Startup warning: models with no pricing/latency data ranked last
- One-per-type enforcement: digitalocean_pricing; error if cost_metrics + digitalocean_pricing both configured
- cost_snapshot() / latency_snapshot() on ModelMetricsService for startup checks
- Demo config updated to v0.4.0 top-level routing_preferences with cheapest + fastest policies
- docker-compose.yaml + prometheus.yaml + metrics_server.py for demo latency metrics
- Schema and docs updated
…on missing data at request time
adilhafeez
changed the title
…ne in config.yaml
Plano should only handle ranking that requires server-side data (cost metrics, latency). Random shuffling is trivial for callers.
PR #851 introduced duplicate openai/gpt-4o entries and set use_agent_orchestrator: true with multiple endpoints. Fixed by using groq/llama-3.3-70b-versatile for the routing_preferences example and setting use_agent_orchestrator: false.
Falls back to bare python when uv is not available (CI).
PR #851 added ratelimit examples using unit: day but the Rust TimeUnit enum only had second/minute/hour. Adds Day variant and maps it to per-hour quota (tokens/24).
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Summary
routing_preferences(v0.4.0+) with candidate model list andselection_policy/routing/v1/*returns rankedmodels[]array; client usesmodels[0], falls back on 429/5xxselection_policy.prefer:cheapest,fastest,random,nonemodel_metrics_sources:cost_metrics,prometheus_metrics,digitalocean_pricing(public DO catalog withmodel_aliases)fixes #848