Blog — OpenRouter Blog

Pinned

Ori Eval: Find the Best Model for What You're Building

Choosing the model inside your product is often decided without a systematic method. Ori Eval answers the question with proof: it runs your agent on your own prompts, checks the tools it called, and grades the answers.

August 3, 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

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

Model Routing Powered by Wisdom of the Market

Our new Auto router is informed by the model decisions of millions of people, and it outperforms conventional task-based classifiers across a wide spectrum of tasks.

August 10, 2026

Set Up Team AI Spend Controls on OpenRouter

OpenRouter has five controls for team spend: an organization with a shared credit pool, presets that scope models per workload, per-key spend caps, guardrails that enforce per-member budgets, and the Activity dashboard that shows who spent what. This guide sets them all up in one pass, in order.

August 7, 2026

Governing AI Spend Across a Team on OpenRouter

Your team's AI bill is the total of every key each engineer holds. OpenRouter gives you six ways to control that spend, from per-key limits to Enterprise workspace budgets. This guide explains what each control caps, what plan it needs, and which ones fit your team.

August 6, 2026

Ori Harness: The Best Way to Use OpenRouter with Any Harness

Using OpenRouter with your favorite harness usually means ad-hoc scripts or a wall of environment variables. Install the ori CLI, log in once, and every supported harness runs with an optimized configuration out of the box.

August 4, 2026

Using OpenRouter With LangChain: ChatOpenRouter Setup Guide

The LangChain integration now has a dedicated package: langchain-openrouter on PyPI and @langchain/openrouter on npm. Most guides still teach the old ChatOpenAI base_url override. This is the current path, plus the routing economics the docs skip.

July 29, 2026

How to Evaluate LLM Provider Performance Across Latency, Throughput, and Uptime

The same model behaves differently across provider endpoints. Infrastructure, quantization, load handling, and routing defaults all change the result. Here's how to measure latency, throughput, uptime, and precision, then turn the measurements into a routing policy.

July 28, 2026

Image Generation Models on OpenRouter

Generation runs through the dedicated /api/v1/images endpoint and understanding through /chat/completions, with the same key and billing. Here's the full contract for both jobs, plus the fix for the 'no endpoints found' error.

July 27, 2026

Classifiers: Track What Your Agents Do and What It Costs

Define a taxonomy and a small model tags every generation in your workspace by department, task type, or agent complexity. Filter your logs and group your Activity analytics by the results.

July 24, 2026

Transcription on OpenRouter

Send base64 audio to POST /api/v1/audio/transcriptions and get JSON text plus a usage object back, with the same API key you already use for chat. Here's the full request contract, the model families, and the limits to design around.

July 22, 2026

The Cheapest Token Is a Cached One: Prompt Caching + Sticky Routing

Your agent sends the same system prompt, tool definitions, and schemas on every turn. Cache reads cost 0.1x to 0.5x of fresh input, but only if the next request lands on the provider holding the warm cache. Here's how caching and sticky routing work together, and how to confirm they're working.

July 21, 2026

View all posts RSS