Private AI
GPT-5.6 Terra is the balanced model in OpenAI's GPT-5.6 series, positioned between flagship Sol and cost-efficient Luna. It is suited for everyday coding, reasoning, agentic work, and general professional tasks.
Added Jul 9, 2026
Context Window
1.1M
Max Output
128.0K
Input Price (Auto)
$2.50/1M
Output Price (Auto)
$15.00/1M
Cache Read (Auto)
$0.25/1M
Capabilities
Performance metrics and benchmarks
Sourced from Artificial Analysis.
Intelligence Index
55.0
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Coding Index
76.7
GPQA Diamond
Graduate-level scientific reasoning
92.5%
Better than 97% of models compared
HLE
Humanity's Last Exam
41.8%
Better than 98% of models compared
IFBench
Instruction-following benchmark
71.2%
Better than 87% of models compared
T²-Bench Telecom
Conversational AI agents in dual-control scenarios
86.3%
Better than 79% of models compared
AA-LCR
Long context reasoning evaluation
74.0%
Better than 98% of models compared
SciCode
Python programming for scientific computing
53.9%
Better than 97% of models compared
Terminal-Bench Hard
Agentic coding and terminal use
57.6%
Last updated Jul 22, 2026
Artificial AnalysisBetter than 97% of models compared
