Claude Opus 5 (Fast) vs Nemotron 3 Ultra: side-by-side summary

Claude Opus 5 (Fast) and Nemotron 3 Ultra 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 Ultra, from Nvidia, has a 512,288-token context window and is priced at $0.50/M tokens input, $2.20/M tokens output on OpenRouter.

Context window

• Claude Opus 5 (Fast): 1,000,000 tokens
• Nemotron 3 Ultra: 512,288 tokens

Price

• Claude Opus 5 (Fast): $10/M tokens input, $50/M tokens output
• Nemotron 3 Ultra: $0.50/M tokens input, $2.20/M tokens output

Provided by

• Claude Opus 5 (Fast): Anthropic
• Nemotron 3 Ultra: Nvidia

• Claude Opus 5 (Fast) model details, providers and pricing
• Nemotron 3 Ultra model details, providers and pricing