GPT-5.6 Sol (ChatGPT, August 2026)

Name: GPT-5.6 Sol (ChatGPT, August 2026)
Author: OpenAI

OpenAI · 2026-08-06

OpenAI's August 6, 2026 ChatGPT-specific GPT-5.6 Sol update, distinct from the July model retained in Codex and ChatGPT Work. The original August system card explicitly separates these artifacts; its reasoning slider is supported, but an exact API identifier, context limit and knowledge cutoff for this ChatGPT release are not disclosed.

Benchmark scores

Benchmark	Score
HealthBench (length-adjusted)	55.0
HealthBench (updated implementation)	52.1
HealthBench Consensus (length-adjusted)	95.5
HealthBench Consensus (updated implementation)	95.3
HealthBench Hard (length-adjusted)	31.4
HealthBench Hard (updated implementation)	27.1
HealthBench Professional	56.6
HealthBench Professional (Length-Adjusted)	54.0
MentalHealthBench	47.0