Blog — OpenRouter Blog

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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

Kilo Code + OpenRouter: Setup, Model Routing, and Free Models

Kilo Code is a bring-your-own-provider coding agent, so adding OpenRouter gives it one key for 300+ models, provider routing, and failover. Here's the three-step setup plus the kilo.json fields that control routing.

June 17, 2026

How to Use OpenAI Codex CLI with OpenRouter

Codex CLI supports custom OpenAI-compatible providers, so a small config.toml block routes it through OpenRouter. You get provider failover, usage tracking, and one key across every model, with no change to Codex itself.

June 17, 2026

How to Use Claude Code with OpenRouter

Route Claude Code through OpenRouter with three environment variables and no local proxy. You get provider failover, budget controls, and usage visibility on top of the same Anthropic models.

June 16, 2026

How to Use OpenRouter With Any Coding Agent or AI Tool

Any tool that speaks the OpenAI API works with OpenRouter after two changes, the base URL and the key. Here's the setup pattern and the tools that already support it.

June 16, 2026

Subagent: Let Your Model Delegate the Busywork

The openrouter:subagent server tool lets a frontier model hand off self-contained tasks to a smaller, cheaper, faster worker model mid-generation. Summarize a doc, extract structured data, reformat text, all without burning frontier tokens.

June 16, 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

Keep Your Agent Running When Models Disappear

Anthropic restricted Claude Fable 5 just days after launch. If your code hard-codes a model slug, that becomes your outage too. Presets move model choice to the server so you can swap models, set fallbacks, and enforce a data policy without redeploying.

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

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