Private AI
GPT-5.6 Sol is the flagship model in OpenAI's GPT-5.6 series. It is suited for complex reasoning, coding, agentic workflows, command-line work, and multi-step professional tasks.
Added Jul 9, 2026
Context Window
1.1M
Max Output
128.0K
Input Price (Auto)
$5.00/1M
Output Price (Auto)
$30.00/1M
Cache Read (Auto)
$0.50/1M
Capabilities
Performance metrics and benchmarks
Sourced from Artificial Analysis.
Intelligence Index
58.9
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Coding Index
77.4
GPQA Diamond
Graduate-level scientific reasoning
94.1%
Better than 99% of models compared
HLE
Humanity's Last Exam
47.2%
Better than 99% of models compared
IFBench
Instruction-following benchmark
72.7%
Better than 90% of models compared
T²-Bench Telecom
Conversational AI agents in dual-control scenarios
85.1%
Better than 77% of models compared
AA-LCR
Long context reasoning evaluation
73.7%
Better than 97% of models compared
SciCode
Python programming for scientific computing
56.1%
Better than 98% of models compared
Terminal-Bench Hard
Agentic coding and terminal use
65.9%
Last updated Jul 22, 2026
Artificial AnalysisBetter than 99% of models compared
