GPT-5.6 Terra Pro vs Laguna XS 2.1: side-by-side summary

GPT-5.6 Terra Pro and Laguna XS 2.1 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

GPT-5.6 Terra Pro, from OpenAI, has a 1,050,000-token context window and is priced at $1/M tokens input, $6/M tokens output on OpenRouter.

Laguna XS 2.1, from poolside, has a 262,144-token context window and is priced at $0.06/M tokens input, $0.12/M tokens output on OpenRouter.

Context window

• GPT-5.6 Terra Pro: 1,050,000 tokens
• Laguna XS 2.1: 262,144 tokens

Price

• GPT-5.6 Terra Pro: $1/M tokens input, $6/M tokens output
• Laguna XS 2.1: $0.06/M tokens input, $0.12/M tokens output

Provided by

• GPT-5.6 Terra Pro: OpenAI
• Laguna XS 2.1: poolside

• GPT-5.6 Terra Pro model details, providers and pricing
• Laguna XS 2.1 model details, providers and pricing