Blog — OpenRouter Blog

Introducing the New Auto and Auto Code Routers

The next generation of Auto Router, rebuilt on a new technical foundation, plus Auto Code, a new router specialized for coding work. Both weigh eleven factors per request against live pricing, provider health, benchmarks, and cache state to pick a model and reasoning effort from the model pool your governance policies allow.

November 6, 2026

Build an AI Code Reviewer with OpenRouter

Code reviewers that only read a Git diff have to guess whether a change breaks anything, and their fixes come back as prose you apply by hand. This guide builds a Python reviewer on the OpenRouter Responses API that uploads your changed files into a Linux sandbox, runs checks to confirm each bug, and returns validated patches. A review takes one to four minutes and costs $0.015 to $0.045.

November 1, 2026

How to Build Your Own Always-On AI Agent

An always-on AI agent wakes up on a schedule, checks something with tools, and reports or acts without you asking. This tutorial builds one in TypeScript with the OpenRouter Agent SDK that watches Hacker News, remembers what it has seen across restarts, stops any run at five cents, and waits for your approval before it posts.

October 31, 2026

Open-Weight vs Closed-Weight Models: What's the Difference?

An open-weight model publishes its trained weights, so anyone can run, fine-tune or serve it. A closed-weight model is only available from its maker. We used a year of OpenRouter usage data, our price catalog and benchmark scores to show what that difference changes for cost, providers and quality.

October 31, 2026

How Much Does Claude Code Cost? Real Session Costs by Model

Claude Code is free to install, and what you pay for is the model it calls. We publish the median cost of real Claude Code sessions on OpenRouter by model and session length. This post shows those costs, why the first request costs the most, what a month of use comes to, and how to lower the bill.

October 30, 2026

Claude Opus vs Sonnet vs Haiku: Which Should You Use?

Use Claude Sonnet 5.5 as your default, Haiku 5.5 for high-volume and sub-agent work, and Opus 5.5 for long tasks where a mistake is costly. We compared the three on price, benchmarks, 11 coding tasks with hidden tests and a Claude Code bug fix. All three passed everything, so the difference was cost.

October 30, 2026

Guardrails Now Separate Organization Limits from Workspace Defaults

Admins can now set organization-wide limits, give people different budgets and model access within them, and change each policy on its own. Existing guardrails keep working.

October 30, 2026

How to Extract Tables from a PDF with an LLM

Send a PDF to a model that reads files, with a strict JSON schema for one row, and you get typed rows back, even from scans and tables that run across pages. We tested five routes on five PDFs and found two failures that return a normal response with no error, and the checks that catch them.

October 29, 2026

How to Prevent Prompt Injection: 13 Attacks, Tested

If your app has a model read documents, emails or web pages, anyone who writes in them can try to give it instructions. We ran 25 attacks against four current models with each defense on and off. Labels cut attack emails, but only checking every tool call with Armor stopped all of them.

October 29, 2026

Claude 529 Overloaded: What It Means and How to Fix It

A 529 overloaded_error from Claude means Anthropic's API is out of capacity for the model you asked for, not that your key or plan is wrong. This guide shows how to retry with backoff, send the same Claude model to another provider through OpenRouter, add a fallback model, and stop the error in Claude Code.

October 28, 2026

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Introducing the New Auto and Auto Code Routers

OpenRouter is Joining Stripe

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

Surpassing Frontier Performance with Fusion

Build an AI Code Reviewer with OpenRouter

How to Build Your Own Always-On AI Agent

Open-Weight vs Closed-Weight Models: What's the Difference?

How Much Does Claude Code Cost? Real Session Costs by Model

Claude Opus vs Sonnet vs Haiku: Which Should You Use?

Guardrails Now Separate Organization Limits from Workspace Defaults

How to Extract Tables from a PDF with an LLM

How to Prevent Prompt Injection: 13 Attacks, Tested

Claude 529 Overloaded: What It Means and How to Fix It