Open-source Plano routes LLM calls by prompt intent, no agent code changes, cutting bills 2x
Roger_M_Taylor · x · 2026-09-12
Plano (7k stars on GitHub, by katanemo) is an open-source AI-native proxy server for agentic apps offering smart LLM routing, observability, orchestration and guardrails.
The trick: point your client's baseurl at Plano's local endpoint and it routes by prompt intent without touching agent code — e.g. "write a binary search" goes to claude-sonnet-4.5, while "Capital of France?" goes to gpt-4o-mini, so trivial tasks hit cheap models. The planoai obs command gives a live view of every routing decision, model picked and route taken.
A cited case reports cutting an Hermes Agent bill 2x with this "cheapest capable model" layer — the same approach Coinbase reportedly uses.
More from coding & agent
- Limma MCP structures unstructured data end-to-end so agents never miss a detail — FlimsyIngenuity7248 · 2026-10-31
- Agent audit metric: can you name which tests ran and files changed without reading its summary? — ronbodkin · 2026-10-31
- FlowSense MCP lets Claude Code inspect and firewall your Mac's network traffic locally — hani_q · 2026-10-31
- Dev: coding agent notifications only worth pushing when waiting on approval — petrusenko_max · 2026-10-31
- Unofficial OpenTargets MCP Server Brings Gene-Drug-Disease Data to LLMs — modelcontextprotocol · 2026-10-31
- zero-core-budget MCP Connector Adds Spending and ROI Tracking for Agents — modelcontextprotocol · 2026-10-31