Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/LeekJay/claude-skills-pluginnpx agentmods add skills/leekjay/claude-skills-plugin/smart-model-routerWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/leekjay/claude-skills-plugin/smart-model-router)<a href="https://agentmods.dev/skills/leekjay/claude-skills-plugin/smart-model-router"><img src="https://agentmods.dev/badge/skills/leekjay/claude-skills-plugin/smart-model-router/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/leekjay/claude-skills-plugin/smart-model-router"><img src="https://agentmods.dev/badge/skills/leekjay/claude-skills-plugin/smart-model-router.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00094 | $0.03550 |
| Opus 5 | $0.00047 | $0.01775 |
| Sonnet 5 | $0.00019 | $0.00710 |
| Haiku 4.5 | $0.00009 | $0.00355 |
Grade A, and why
smart-model-router scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 9d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 542 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Smart Model Router Skill
Overview
This skill provides intelligent model selection and task routing across multiple AI models:
- Claude Opus 4.5: Complex reasoning, architecture decisions, security-critical code
- Claude Sonnet 4.5: Special scenarios requiring Claude-specific features
- Claude Haiku 4.5: Code review, simple coding, sub-agent execution, real-time tasks, output optimization
- GPT-5.2 (via Codex): Complex coding, multi-file refactoring, template generation, DEFAULT choice
- Gemini CLI: Large codebase analysis, frontend design, global understanding
Trigger Testing (Optional)
After enabling this skill, you can use these prompts to verify automatic triggering works:
- "Help me choose the most suitable model for this task / which model is better?"
- "Route this task to the best model / choose the right model for this job."
- "This is a frontend/UI design or React component task, please prioritize Gemini."
- "Need multi-model orchestration: analyze first, then execute, then tell me why you chose this model."
If not automatically triggered, you can explicitly say "use smart-model-router" as fallback.
Architecture: Three-Layer System
+-------------------------------------------------------------+
| User Request |
+---------------------------+---------------------------------+
|
v
+-------------------------------------------------------------+
| Layer 1: Haiku Decision Layer (model-orchestrator) |
| - Task classification - Model selection - Prompt optim |
+---------------------------+---------------------------------+
|
v
+-------------------------------------------------------------+
| Layer 2: Execution Layer (model-executor) |
| - Codex (GPT-5.2) - Gemini - Claude internal models |
+---------------------------+---------------------------------+
|
v
+-------------------------------------------------------------+
| Layer 3: Output Optimization Layer (output-optimizer)|
| - Extend and polish concise Codex output |
| - Add context explanation, improvement suggestions, risks |
| - Use Haiku for lightweight optimization |
+---------------------------+---------------------------------+
|
v
Return to User
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 9d ago First seen · 542 lines · 0 tokens per session scan A 378239626b20
smart-model-router is a skill published in the GitHub repository LeekJay/claude-skills-plugin (4 stars, last pushed 9mo ago), licensed MIT. It adds 94 tokens to every session and 3,550 once invoked, about $0.0005 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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