OpenAI

GPT-5.6 Sol Pro

Type
language model
Context
1,050K tokens
Max output
128K
Released
9 July 2026
Knowledge cutoff
February 2026
API string
openai/gpt-5.6-sol-pro

Prices by provider

Provider Input, $ per 1M Output, $ per 1M In our data since
OpenRouter $5 $30 31 Jul 2026

Only the base tier and only per-token prices are shown. Batch, discounted and cached rates, as well as prices per image or per second of video, do not go into this table: they cannot stand in the same column as a price per million tokens.

The date in the last column is the day this price first entered our collection. The price may well be older: before that day we simply were not recording it. It has not changed since — otherwise a new row with a new date would stand in its place.

Measurement results

Task set Result Run conditions Measured by
WeirdML — unusual machine learning tasks 89.43 % effort: max https://htihle.github.io/weirdml.html
FrontierMath, level 4 — research-grade problems 82.93 % effort: max Epoch evaluations
SimpleBench — trick questions 66.04 % SimpleBench Leaderboard
Chess puzzles 62.12 % effort: max Epoch evaluations
APEX-Agents 40 % effort: max