About
GPT-5.6 Sol is the flagship model in OpenAI's GPT-5.6 series. It is suited for complex reasoning, coding, and agentic workflows, and is particularly strong at command-line and multi-step coding tasks...
Related Models
Pricing
Input
$5.00
per 1M tokens
Output
$30.00
per 1M tokens
Blended
$11.25
per 1M tokens
Cheaper than 4% of models. Median price is $0.66/1M tokens.
Cost Calculator
Tokens per day1M
100K100M
Daily
$11.25
Monthly
$337.50
vs. Similar Models
Anthropic: Claude Fable 5Q:+1.0
$20.00+78%
GPT-5.6 Sol (xhigh)Q:-1.2
$11.250%
GPT-5.6 Sol (high)Q:-3.0
$11.250%
Anthropic: Claude Opus 4.8Q:-3.2
$10.00-11%
Performance
87
tokens/sec
Faster than 45% of models
76.93
seconds
Faster than 2% of models
76.93
seconds
Faster than 3% of models
Market Median
99 tok/s
12% slower
Median TTFT
1.11s
6849% slower
Throughput/Dollar
8
tok/s per $/1M
Speed Comparison
Llama 3.2 Instruct 1B
88 tok/s+0%
Ring-flash-2.0
86 tok/s-1%
Ministral 3 8B
89 tok/s+2%
Context Window
1.1M
tokens
Larger than 96% of models
Max Output
128K
tokens
12% of context
Benchmarks
MMLU-ProNot evaluated
GPQA Diamond
94.1%
HLE
47.2%
LiveCodeBenchNot evaluated
SciCode
56.1%
TerminalBench Hard
65.9%
MATH-500Not evaluated
AIMENot evaluated
AIME 2025Not evaluated
IFBench
72.7%
Long Context Recall
73.7%
Tau2
85.1%
Market AverageTop Score