Dated and public, newest first. We ship fast and in the open across the
hosted platform, the routing engine, the open-source library, and the
research behind it. Here is the trail.
2026-06oss
Open-source 0.3.0: tracer.watch, a JavaScript watcher, and the tracer cloud CLI
Drop the tracer.watch decorator on the function that already
calls your LLM and every call is observed and shipped, free, to Tracer
Cloud, where it accumulates and auto-optimizes once there is enough. A
zero-dependency @tracer-llm/watch package brings the same one-line
observability to JavaScript and TypeScript. And tracer cloud is
now a full command-line interface at parity with the dashboard: create,
train, route, test, and watch your tracers from the terminal.
Full release notes →
2026-06oss
Open-source 0.2.0: tracer scan, held-out parity certification, and an OOD safety gate
New tracer scan gives a day-one read of any trace file: how
much traffic a near-free model can answer at your target, proven on
held-out data, with an interactive 3D map of your embedding space. The
parity gate now certifies on exact held-out lower bounds instead of
in-sample estimates, stays monotonic in the target you set, and a new
distance-based gate defers off-distribution inputs to the teacher rather
than guessing. Tree models are opt-in with --trees for fast
default fits. Full release notes →
2026-06ship
Tracer Cloud in closed beta
The hosted platform opened at app.tracerml.ai. Sign up stays open,
access is invite-only while we ramp. Bring your own keys, with zero
markup on provider tokens.
2026-06ship
Partition map and per-cell decision cards
Every tracer renders its full partition. Each cell shows its dominant
decision, real example queries, the share of traffic it covers, and its
certified accuracy bound, so the routing logic is legible end to end.
2026-06ship
Live-query tester
Paste any query and see which cell it lands in and whether it routes to
the cheap model or defers to the teacher, before you move a single unit
of real traffic.
2026-06ship
Certified one-click activation
Each tracer carries a certificate: certified coverage and teacher
agreement on held-out traffic. Promote to live routing in one click
once it clears your target, and switch back just as fast.
2026-06ship
Multi-tier model menu, bring your own keys
Route across a tier menu: the ML surrogate for the predictable slice
and your choice of frontier models for the rest. Bring keys for OpenAI,
Anthropic, Bedrock, and more, and switch providers anytime.
2026-06ship
OpenAI-compatible API and Hermes agent plugin
Point any stack at a drop-in OpenAI-compatible endpoint, or wire tool
selection straight into the Hermes agent framework with the native
plugin. No prompt changes.
2026-06ship
Durable trace storage and live analytics
Every routed query writes its full request and response to durable
storage, with a per-tracer redaction toggle. The analytics read live
traffic, with coverage, savings, and agreement tracked continuously.
2026-06oss
A higher bar for contributions
The open-source repo now asks for evidence over intuition. Model
additions and core-parameter changes need a reproducible benchmark on
the coverage-vs-agreement frontier. Added a Code of Conduct, CODEOWNERS,
and structured issue forms.
2026-06docs
Cold-start guide and Router tests
Merged a practical cold-start guide for teams evaluating with small
trace sets, plus direct unit coverage for the production Router. Both
from the community.
2026-05ship
Case studies, with real numbers
Published the first production write-ups. Obside replaced a frontier
call per news-by-intent pair with a 38-cell surrogate at 95% saved.
getclaw routed agent tool selection through a TRACER classifier and cut
end-to-end cost around 50%.
2026-05oss
tracer-llm on PyPI
The open-source library shipped: fit a routing policy from your traces,
inspect the partition, serve predictions locally. Logistic and gradient
heads, calibrated accept gates, an HTML audit report.
2026-05paper
The routing method, published and featured
The conformal routing method behind TRACER is written up and featured
on Hugging Face Papers. Read it on
Hugging Face
or arXiv.