GPT-5.6 Terra vs Nemotron 3 Ultra: side-by-side summary

GPT-5.6 Terra and Nemotron 3 Ultra are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

GPT-5.6 Terra, from OpenAI, has a 1,050,000-token context window and is priced at $2/M tokens input, $12/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

• GPT-5.6 Terra: 1,050,000 tokens
• Nemotron 3 Ultra: 512,288 tokens

Price

• GPT-5.6 Terra: $2/M tokens input, $12/M tokens output
• Nemotron 3 Ultra: $0.50/M tokens input, $2.20/M tokens output

Provided by

• GPT-5.6 Terra: OpenAI
• Nemotron 3 Ultra: Nvidia

• GPT-5.6 Terra model details, providers and pricing
• Nemotron 3 Ultra model details, providers and pricing