GPT-5.6 Terra

Name: GPT-5.6 Terra
Price: 2.5 USD
Author: OpenAI

OpenAI🇺🇸 United States

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Context window1000K tokens

Input / 1M tokens$2.5

Output / 1M tokens$15

Version History

5.6minorJuly 9, 2026

GPT-5.6 Terra introduces a balanced mid-tier option in the GPT-5.6 series with 1M context window at $2.50/$15 per million tokens, positioned between flagship Sol and cost-efficient Luna tiers. Targets everyday coding, reasoning, and agentic tasks with February 2026 knowledge cutoff.

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model releaseOpenAI

OpenAI Releases GPT-5.6 Terra: Mid-Tier Model at $2.50 Input/$15 Output per 1M Tokens

OpenAI has released GPT-5.6 Terra, a mid-tier model in its GPT-5.6 series priced at $2.50 per million input tokens and $15 per million output tokens. The model features a 1 million token context window and February 2026 knowledge cutoff, positioned between the flagship Sol and cost-efficient Luna tiers.

July 9, 2026 · 5:20 PM2 min read

OpenAI GPT-5.6 model release