Skip to content
  • Models
  • Rankings
  • Ori
ElevenLabs launch offer: every ElevenLabs model is 50% off through October 19, 2026. See ElevenLabs models

Footer

OpenRouterOpenRouter
© 2026 OpenRouter, Inc

Product

  • Chat
  • Rankings
  • Benchmarks
  • Apps
  • Discover
  • Models
  • Ori
  • Collections
  • Providers
  • Tools
  • Pricing
  • Business
  • Enterprise
  • Labs

Company

  • About
  • Blog
  • Careers
    Hiring
  • Privacy
  • Terms of Service
  • Trust Center
  • Support
  • Works With OR
  • Data
  • Brand

Developer

  • Documentation
  • API Reference
  • Developer Platform
  • Status
  • AI Site Map

Connect

  • Discord
  • GitHub
  • LinkedIn
  • X
  • YouTube
Favicon for essentialai

Essentialai

Access 1 Essentialai model through the OpenRouter unified API including Rnj 1 Instruct. Compare pricing, context windows, benchmarks, and capabilities between different Essentialai models.

Essentialai requests made on OpenRouter

Not enough data to display yet.

  • Favicon for essentialai
    EssentialAI: Rnj 1 InstructRnj 1 Instruct

    Rnj-1 is an 8B-parameter, dense, open-weight model family developed by Essential AI and trained from scratch with a focus on programming, math, and scientific reasoning. The model demonstrates strong performance across multiple programming languages, tool-use workflows, and agentic execution environments (e.g., mini-SWE-agent).

    by essentialaiDec 7, 202533K context

Frequently asked questions

OpenRouter serves 1 Essentialai model behind one OpenAI-compatible API. Create an OpenRouter API key, point your client at https://openrouter.ai/api/v1, and set the model to an ID such as essentialai/rnj-1-instruct. The quickstart has request examples for every supported SDK.

Rnj 1 Instruct has the largest context window of any Essentialai model on OpenRouter, accepting up to 32,768 tokens per request.

Rnj 1 Instruct is the most recently added Essentialai model on OpenRouter, listed on December 7, 2025.