Blog — OpenRouter Blog

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

What Is an LLM Gateway? The Missing Layer Between Your App and AI Models

Without an LLM gateway, provider outages become user-facing errors and AI spend stays opaque. Compare the best options by routing, compliance, and setup time.

June 11, 2026

Advisor: Give Any Model a Lifeline to a Smarter One

The openrouter:advisor server tool lets a fast, cheap model consult a stronger one mid-generation. Run GPT-4o Mini for the routine work. Call Claude Fable when it actually matters.

June 10, 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

A Robot is Sprinting Towards You: Do You Want it Running on Claude or Grok?

A 30-game battle royale across eleven LLMs, $482 of inference, and one finding that should change how you read model benchmarks.

June 4, 2026

May Release Spotlight

Speech and transcription APIs, Model Fusion, private models, enterprise workspace controls, and 20 new model launches including Gemini 3.5 Flash and Claude Opus 4.8.

June 1, 2026

Guardrails: Protect your Agents, Data, and Costs

Configurable security and governance tools for budget enforcement, zero data retention, model and provider restrictions, prompt injection defense, and data loss prevention.

May 29, 2026

OpenRouter Raises $113M Series B

OpenRouter has raised a $113M Series B led by CapitalG, with participation from NVentures, ServiceNow Ventures, MongoDB Ventures, Snowflake Ventures, Databricks Ventures, AMP PBC, and Pace Capital, alongside existing investors Andreessen Horowitz and Menlo Ventures.

May 28, 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

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