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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 tokens processed on OpenRouter

  • 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.