Claude Opus 5 (Fast) vs Nemotron 3.5 Lightning: side-by-side summary

Claude Opus 5 (Fast) 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.

Claude Opus 5 (Fast), from Anthropic, has a 1,000,000-token context window and is priced at $10/M tokens input, $50/M tokens output on OpenRouter.

Nemotron 3.5 Lightning, from Nvidia, has a 262,144-token context window and is priced at $0.08/M tokens input, $0.20/M tokens output on OpenRouter.

Context window

• Claude Opus 5 (Fast): 1,000,000 tokens
• Nemotron 3.5 Lightning: 262,144 tokens

Price

• Claude Opus 5 (Fast): $10/M tokens input, $50/M tokens output
• Nemotron 3.5 Lightning: $0.08/M tokens input, $0.20/M tokens output

Provided by

• Claude Opus 5 (Fast): Anthropic
• Nemotron 3.5 Lightning: Nvidia

• Claude Opus 5 (Fast) model details, providers and pricing
• Nemotron 3.5 Lightning model details, providers and pricing