Grok 4.6 vs Nemotron 3.5 Lightning: side-by-side summary

Grok 4.6 and Nemotron 3.5 Lightning are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

Grok 4.6, from SpaceXAI, has a 500,000-token context window and is priced at $2/M tokens input, $6/M tokens output on OpenRouter.

Nemotron 3.5 Lightning, from Nvidia, has a 262,144-token context window and is priced at $0.05/M tokens input, $0.20/M tokens output on OpenRouter.

Context window

• Grok 4.6: 500,000 tokens
• Nemotron 3.5 Lightning: 262,144 tokens

Price

• Grok 4.6: $2/M tokens input, $6/M tokens output
• Nemotron 3.5 Lightning: $0.05/M tokens input, $0.20/M tokens output

Provided by

• Grok 4.6: SpaceXAI
• Nemotron 3.5 Lightning: Nvidia

• Grok 4.6 model details, providers and pricing
• Nemotron 3.5 Lightning model details, providers and pricing