OpenAI's new flagship series of reasoning models for solving hard problems. Useful when tackling complex problems in science, coding, math, and similar fields.
Context Window
128.0K
Max Output
32.8K
Input Price (Auto)
$15.00/1M
Output Price (Auto)
$60.00/1M
Cache Read (Auto)
$7.50/1M
Capabilities
Benchmarks
Benchmarks
Performance metrics and benchmarks
Sourced from Artificial Analysis.
Intelligence Index
23.4
Coding Index
39.7
Reasoning
GPQA Diamond
Graduate-level scientific reasoning
74.7%
Better than 64% of models compared
HLE
Humanity's Last Exam
7.7%
Better than 57% of models compared
IFBench
Instruction-following benchmark
70.3%
Better than 85% of models compared
T²-Bench Telecom
Conversational AI agents in dual-control scenarios
62.6%
Better than 59% of models compared
AA-LCR
Long context reasoning evaluation
59.3%
Better than 75% of models compared
Coding
SciCode
Python programming for scientific computing
35.8%
Better than 60% of models compared
Terminal-Bench Hard
Agentic coding and terminal use
12.9%
Better than 50% of models compared
LiveCodeBench
Contamination-free coding benchmark
67.9%
Better than 76% of models compared
Math
AIME
American Invitational Mathematics Examination
72.3%
Better than 82% of models compared
Math-500
Diverse mathematical problem solving benchmark
97.0%
Better than 87% of models compared
Knowledge
MMLU-Pro
Professional and academic subject knowledge
84.1%
Better than 88% of models compared
Last updated Jun 28, 2026
Artificial AnalysisProviders
Auto routing is available for this model. Explicit provider selection is not available.
Loading provider options…
Related text models
Compare OpenAI o1-preview with similar models from the same provider or model family.
GPT 5.6 Luna
openai/gpt-5.6-lunaGPT-5.6 Luna is the fast, cost-efficient model in OpenAI's GPT-5.6 series. It is suited for high-volume chat, classification, lightweight agentic workflows, and latency-sensitive reasoning tasks.
GPT 5.6 Luna Pro
openai/gpt-5.6-luna-proGPT-5.6 Luna with Pro reasoning mode. Pro mode performs more model work for difficult tasks; reasoning effort remains independently configurable and defaults to medium.
GPT 5.6 Sol
openai/gpt-5.6-solGPT-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.
GPT 5.6 Sol Pro
openai/gpt-5.6-sol-proGPT-5.6 Sol with Pro reasoning mode. Pro mode performs more model work for difficult tasks; reasoning effort remains independently configurable and defaults to medium.
GPT 5.6 Terra
openai/gpt-5.6-terraGPT-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.
GPT 5.6 Terra Pro
openai/gpt-5.6-terra-proGPT-5.6 Terra with Pro reasoning mode. Pro mode performs more model work for difficult tasks; reasoning effort remains independently configurable and defaults to medium.