# OpenAI: GPT-5.6 Terra: AI model fact sheet

- **Provider:** openai
- **Released:** 2026-07-09
- **Context window:** 1,050,000 tokens
- **API pricing:** $2.50 / 1M input, $15.00 / 1M output
- **OpenRouter ID:** openai/gpt-5.6-terra
- **Capabilities:** conversation, reasoning, code-generation, analysis, agentic-tool-use

GPT-5.6 Terra is a balanced model in OpenAI's GPT-5.6 series, positioned between the flagship Sol tier and the cost-efficient Luna tier. It suits everyday coding, reasoning, and agentic tasks where capability and cost need to be balanced, at roughly half the cost of Sol.

Source: real side-by-side outputs, pricing and specs at https://rival.tips/models/gpt-5.6-terra