Tutorials

Guides, walkthroughs, and integration how-tos.

Free LLM APIs Compared: Rate Limits, Models, and Real Costs (2026)

Stop guessing which free LLM API survives past a side project. Here's how OpenRouter, Groq, Gemini, and 10 more compare on limits, cost, and data use.

June 15, 2026

Keep Your Agent Running When Models Disappear

Anthropic restricted Claude Fable 5 just days after launch. If your code hard-codes a model slug, that becomes your outage too. Presets move model choice to the server so you can swap models, set fallbacks, and enforce a data policy without redeploying.

June 15, 2026

How to Use Hermes Agent with OpenRouter: Setup, Models & Routing

Hermes Agent has pushed over 17 trillion tokens through OpenRouter. Here's how to set it up, pick a model that clears the 64K context bar, and tune routing for cost and reliability.

June 12, 2026

How to Get the Lowest-Cost LLM Inference on OpenRouter

Append :floor for the cheapest provider, cap spend with max_price, and start free with 20+ zero-cost models. Plus the billing gotchas to avoid.

June 12, 2026

Gemini 2.5 Flash API - Pricing, Quickstart & Provider Comparison

Overpaying for reasoning you don't need? Learn how to configure Gemini 2.5 Flash API thinking budgets, compare providers, and make your first call in 5 minutes.

June 9, 2026

EU AI Act & Colorado ADMT Compliance: Human Oversight for AI Agents

Use the Agent SDK's human-in-the-loop (HITL) tools to meet AI agent compliance requirements from the EU AI Act, Colorado's Automated Decision-Making Technology law (SB26-189), and NIST AI RMF.

June 8, 2026

Human-in-the-Loop Tools for the Agent SDK

A new tool type in the OpenRouter Agent SDK lets your agent auto-resolve routine decisions and pause for human input on high-stakes ones, with two hooks and zero loop-management code.

May 8, 2026

Agent SDK: Building Multi-turn Agent Workflows on OpenRouter

The OpenRouter Agent SDK gives you callModel: one function that turns a chat completion into a multi-step agent with tool calls, stop conditions, and cost tracking across 300+ models.

April 24, 2026

Build Your Own Harness with the Agent SDK

Use the create-agent-tui and create-headless-agent skills to scaffold a personalized coding agent in minutes — with a terminal UI or headless for scripts and pipelines.

April 24, 2026

Distillable Models and Synthetic Data Pipelines with NeMo Data Designer

How to generate license-safe synthetic data workflows for model specialization

December 24, 2025

Presets: How To Seamlessly Transfer Model Configurations Across Apps

Customize once and use everywhere. Server-side presets now simplify your model workflows.

July 29, 2025

Use OpenRouter Models in Cursor: Try it with Moonshot AI's Kimi K2

Explore it in action: See how effortlessly you can run Kimi K2 in Cursor using OpenRouter’s flexible model routing.

July 14, 2025