Loom
Log in Download

Loom is an intelligent model router for coding agents.

We help engineering teams reach frontier quality at a fifth of the price.

80% + cost savings 5.2 pts accuracy gain 27× cheaper bulk lane

Every model, one router

Native lanes

AnthropicAnthropic OpenAIOpenAI DeepSeekDeepSeek xAIxAI MetaMeta

And anything OpenAI-compatible

MistralMistral QwenQwen KimiKimi OpenRouterOpenRouter OllamaOllama Hugging FaceHugging Face

1. Solving the agent cost problem

A single agent run is a few hundred decisions of wildly different worth. Most developers point their best model at all of them.

$ Provider Domain Sub-agents Model Reasoning Harness Cache Complexity Context Retries

2. Intelligent model routing

Loom predicts which model each unit of work needs, then spends what it saved on verifying the answer.

Accuracy Cost Loom

3. Seamless integration

The router is a loopback endpoint your existing harness already knows how to talk to. No provider key ever enters your shell.

Harness Loom Lanes Anthropic OpenAI DeepSeek xAI Meta Failed verification returns
On Terminal-Bench 2.1 the routed fleet scores 82.0% — the best published result on Opus 4.8, and 5.2 points above running one model on every unit.
82.0Full 89-task sweep
Audited rules, no test reads, no web
Turning the verify→repair loop on doubled the pass rate on identical tasks — 0.333 to 0.667. That loop is what the routing savings buy.
2.0×Ablation, same three tasks
best-of-3 no repair vs reflexion N=2 R=2
Same weights, different scaffolds: stock Claude Code scores 78.9% and Terminus 2 scores 74.6%. The harness, not the model, sets the ceiling.
4.3Points between two harnesses
Both running Opus 4.8
Loopback
only Keys never
in shell

Designed for production-grade workloads

1— A cheap answer is never accepted for being cheap. An adversarial verifier runs the real checks, and anything that fails climbs a rung and is re-run higher.

2— Lanes are configuration, not code. Pin a slot — or the whole fleet — to one vendor and you keep the metering, the verification and the receipts.

3— It fails toward the expensive model. Missing key, upstream 500, malformed stream: the unit falls up the ladder, never off it.

How much could you save?

40
$430
Projection
Spend today$275K/yr
With Loom$55K/yr
Estimated annual savings
$220K80% lower cost

Modelled at equivalent output quality, escalations included.

See the bench run

Frontier quality at a fraction of the price

Start saving with intelligent model routing

Download Loom