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Model Router Designer

Category: General  ·  Sub-category: general-misc  ·  Last updated:
Design a model router that sends each LLM request to the cheapest model that can handle it and escalates only the hard cases to the strongest — cutting cost and latency without tanking quality, gated by an eval set so the savings don't come from silently worse answers. Use when one expensive model serves all traffic (most of it easy), when LLM cost or latency is too high, or when balancing quality against spend across a range of request difficulty.
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From the source SKILL.md

Serving 100% of traffic with your most capable model means paying frontier prices for the 70% of requests a smaller model would have nailed. A model router fixes that by routing each request to the cheapest model that can handle it and escalating only the genuinely hard cases — but routed blind, it trades cost for silent quality regressions on exactly the requests that needed the strong tier. This skill designs the router as a measured system: segment the traffic, pick the cheapest signal that separates it, build an escalation path for the misses, and gate the whole thing on an eval set so…

What this skill does

Model Router Designer is a community-contributed Claude Code skill in the general-misc sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/model-router-designer/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when one expensive model serves all traffic (most of it easy), when LLM cost or latency is too high, or when balancing quality against spend across a range of request difficulty.

Who uses this skill

The Model Router Designer Claude Code skill is built for Claude Code users and developers across all disciplines looking for general-purpose AI assistance. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 196,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/model-router-designer
curl -L https://claudskills.com/skills/model-router-designer/SKILL.md \
  -o ~/.claude/skills/model-router-designer/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/model-router-designer/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/model-router-designer/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\model-router-designer\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Telegram

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Model Router Designer Claude Code skill?
Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/model-router-designer/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.
What does the Model Router Designer skill do?
Design a model router that sends each LLM request to the cheapest model that can handle it and escalates only the hard cases to the strongest — cutting cost and latency without tanking quality, gated by an eval set so the savings don't come from silently worse answers. Use when one expensive model serves all traffic (most of it easy), when LLM cost or latency is too high, or when balancing quality against spend across a range of request difficulty.
Is this skill free to install?
Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.
When should I use the Model Router Designer skill?
Use Model Router Designer when your Claude Code task falls under the General category — specifically in the general misc area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Model Router Designer" or describe the task and let Claude pick). Browse related skills at /category/general/.
What is a Claude Code skill and how does the Model Router Designer skill fit in?
A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Model Router Designer is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the General category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA
imtiazrayhan. (2026). Model Router Designer [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/model-router-designer/
BibTeX
@misc{model-router-designer-2026,
  author    = {imtiazrayhan},
  title     = {Model Router Designer [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/model-router-designer/}
}

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Part of ClaudSkills — the open registry for Claude Skills & Claude Code Skills.  ·  What's New  ·  Install guide  ·  About  ·  llms.txt

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