OpenAI · Released Apr 10, 2026
GPT-5.6 Sol (max)
OpenAI's high-tier enterprise reasoning model featuring adaptive test-time compute scaling and extensive multimodal tooling.
OpenRating Index
61.2
0–100 composite
Reasoning Index
85.0
0–100 composite
Cost / Task
$1.23
benchmark run
Output speed
70 tok/s
blended tok/s
Time to first token
0.9s
median latency
Input price
$2.2
per 1M tokens
Output price
$11
per 1M tokens
Context window
500K
tokens
Strengths
Dynamic test-time compute allocation for frontier tasks
Seamless integration with OpenAI enterprise tool suite
Robust cross-domain logic and STEM performance
How we rate GPT-5.6 Sol (max)
OpenRating scores every model on the same axes. The OpenRating Index is a weighted composite of reasoning, knowledge, and agentic benchmarks, normalised to a 0–100 scale. Speed is blended output measured in tokens per second under standardised load, with time-to-first-token reported separately. Prices are list input and output prices per million tokens, and Task Cost measures end-to-end workload spending.
OpenRating Index
61.2
Reasoning Index
85.0
Token Pricing
Input per 1M tokens
$2.2
Output per 1M tokens
$11
Cost of 1M input + 1M output
$13
Task Cost Economics
Empirical cost breakdown for a standard OpenRating Index benchmark task ($1.23 total).
Related models
Compare GPT-5.6 Sol (max) with the models it is most often measured against.