openrouter-ai-models-guide SKILL.md skillA
openrouter-ai-models-guide from nirholas/three.ws is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add nirholas/three.ws/openrouter-ai-models-guide@git:20260501.87cefc9Pins git:20260501.87cefc9 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- nirholas/three.ws
- Path
data/skills/general/openrouter-ai-models-guide/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260501.87cefc9, committed May 1, 2026
- Size
- 4,779 bytes
- Repository stars
- 269
- License
- Apache-2.0
Guide to OpenRouter — the unified API for 200+ AI models from OpenAI, Anthropic, Google, Meta, Mistral, and more. Covers model selection, pricing, routing strategies, fallback chains, and integration with SperaxOS for optimal model usage per task.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# OpenRouter AI Models Guide
OpenRouter provides a unified API for 200+ AI models. This guide covers model selection, pricing, routing, and integration with SperaxOS.
## What Is OpenRouter?
A single API endpoint that routes requests to 200+ models:
```
Your App → OpenRouter API → Model Provider
├── OpenAI (GPT-4, o1, o3)
├── Anthropic (Claude 4, Sonnet, Haiku)
├── Google (Gemini 2.5, Pro, Flash)
├── Meta (Llama 4, Maverick)
├── Mistral (Large, Medium)
├── DeepSeek (V3, R1)
└── 50+ more providers
```
## Quick Start
```bash
curl https://openrouter.ai/api/v1/chat/completions \
-H "Authorization: Bearer $OPENROUTER_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "anthropic/claude-sonnet-4-20250514",
"messages": [{"role": "user", "content": "Hello!"}]
}'
```
## Model Selection Guide
### By Task
| Task | Recommended Model | Why |
|------|------------------|-----|
| **Complex reasoning** | claude-sonnet-4, o3 | Best logical reasoning |
…Read the whole file at its exact version.
How to install
mdr add nirholas/three.ws/openrouter-ai-models-guide@sha256:c5a9c3605c748838The line at the top of this page pins the label git:20260501.87cefc9, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_t3fhbge74evu2t53)
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Versions
The registry has recorded 1 version of this file, committed on May 1, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (4779 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Source
nirholas/three.ws · 269 stars · license Apache-2.0 · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_t3fhbge74evu2t53 GET https://markdownregistry.com/api/v1/resolve?ref=nirholas/three.ws/openrouter-ai-models-guide GET https://markdownregistry.com/api/v1/blob/c5a9c3605c748838ff1c27fdbab4e5620581261a0e3bf370cf353040bc68be8a
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.