Blogsby GlyphOpen-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.
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Sat Oct 312 posts
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...
Fri Oct 303 posts
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.
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.
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.
Thu Oct 292 posts
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.
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.
Wed Oct 283 posts
How we rebuilt provider routing for better, faster inference
Our default routing used to send most traffic to the cheapest provider for a model. The new routing algorithm constantly monitors the performance of every provider endpoint to optimize the balance of cost, speed, and reliability for each...
Hit Your Claude Code Usage Limit? How to Keep Coding
When Claude Code hits your plan's five-hour or weekly limit, you can keep working by pointing it at an OpenRouter API key. You pay per token for the same Claude models, with no usage window.
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.
Tue Oct 271 post
CSAM Screening Across OpenRouter
OpenRouter will screen all inference requests for child sexual abuse material (CSAM) as they pass through our service. Screening happens in flight, during request processing.