openai/gpt-5.6-terraGPT-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.
Scores on standardized evaluations. Higher is better — and rank shows where GPT-5.6 Terra lands among all models tracked on Model Beat.
Graduate-level scientific reasoning
Frontier of human expert knowledge
Scientific research coding
Tool-agent-user reliability
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.
GPT-5.6 Terra is an AI model developed by OpenAI, part of the GPT family, released Jul 9, 2026.
GPT-5.6 Terra's list price from OpenAI is $2.50 per million input tokens and $15 per million output tokens.
GPT-5.6 Terra supports a context window of up to 1.1M tokens.
On standardized evaluations tracked by Epoch AI, GPT-5.6 Terra scores 41.8% on Humanity's Last Exam, 53.9% on SciCode, 92.5% on GPQA Diamond.
Benchmark data from Epoch AI (CC BY) and Artificial Analysis; pricing, specs & descriptions from OpenRouter. Data updated Jul 9, 2026.