Blog — OpenRouter Blog

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

Consistent Web Search and Fetch Across Every Model

Give any tool-calling model the ability to search the web and fetch page content on its own, with multiple search engines and fetch engines to choose from.

May 7, 2026

GPT-5.5 Price Increase: What It Actually Costs

OpenAI doubled per-token prices with GPT-5.5 but the model is less verbose. We measured real usage to see the net cost impact.

May 4, 2026

New Audio APIs for Speech and Transcription

Text-to-speech and transcription are now live on OpenRouter. Two new endpoints give you access to speech synthesis and audio transcription across multiple providers, under one API.

May 1, 2026

Response Caching: Zero Cost for Identical Requests

Introducing the new Response Caching header: enables caching identical API requests so responses come back in a tiny fraction of the time, at zero cost.

April 30, 2026

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