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

OpenRouter vs Portkey: Which LLM Gateway for Your Team?

OpenRouter routes across providers on credits you buy; Portkey governs the provider keys you already have. Here's how they compare on models, observability, compliance, and price.

June 19, 2026

OpenRouter vs LiteLLM: Which LLM Gateway Fits Your Stack?

OpenRouter is a managed gateway; LiteLLM is a self-hosted proxy. Here's how they compare on cost, data residency, routing, and latency.

June 19, 2026

Connect OpenClaw to OpenRouter

OpenClaw has built-in OpenRouter support. One command gives your agents one key, one bill, and automatic failover across 300+ models. Here's the setup and the fixes for the errors that trip people up.

June 18, 2026

How to Connect SillyTavern to OpenRouter (2026 Guide)

One OpenRouter key gives SillyTavern 300+ models in a single dropdown, many of them free to start. Here's the five-step connection, the roleplay models to try, and fixes for the errors users hit most.

June 18, 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

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