Rnj 1 Instruct vs Grok 4.1 Fast: side-by-side summary

Rnj 1 Instruct and Grok 4.1 Fast are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Rnj 1 Instruct, from essentialai, has a 32,768-token context window and is priced by the provider serving it on OpenRouter.

Grok 4.1 Fast, from SpaceXAI, has a 2,000,000-token context window and is priced by the provider serving it on OpenRouter.

Context window

• Rnj 1 Instruct: 32,768 tokens
• Grok 4.1 Fast: 2,000,000 tokens

Price

• Rnj 1 Instruct: Pricing varies by provider
• Grok 4.1 Fast: Pricing varies by provider

Provided by

• Rnj 1 Instruct: essentialai
• Grok 4.1 Fast: SpaceXAI

• Rnj 1 Instruct model details, providers and pricing
• Grok 4.1 Fast model details, providers and pricing