Blog — OpenRouter Blog

Pinned

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

Surpassing Frontier Performance with Fusion

A panel of budget models, fused through OpenRouter, outscored GPT-5.5 and Claude Opus 4.8 on 100 complex research tasks.

June 12, 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

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

Agentic AI Governance: Your API Key Is a Guardrail

Most agentic AI governance frameworks define the rules but never enforce them. Learn how the API routing layer stops runaway spend and model escalation.

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

How OpenRouter Model Routing Works

OpenRouter routes every request across 60+ providers, and you control how: provider order, price ceilings, and the fallback chain. Here's how each routing layer works.

June 12, 2026

OpenRouter Reliability & Automatic Failover: How Requests Keep Succeeding

Provider failover is on by default. Model fallbacks are opt-in. The two layers recover from different failures; here's how each one works and where failover stops.

June 12, 2026

Dinner is Served

Standardizing on one LLM is like everyone at the table ordering their own entree. The case for going family style with your AI, and the OpenRouter data showing teams already do.

June 11, 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

View all posts RSS