Expired50% confidenceFactExact time
GPT-5.6 introduces Max reasoning intensity and Ultra mode, and expands the context window from 1 million to 1.5 million tokens, a 43% increase.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
7/8/2026
First Seen
Valid until: 10/6/2026(expired)
Sources
GPT-5.6编程基准91.9%：三档模型选择与Ultra模式避坑指南
bilibili费曼学AI6/28/2026
Related Claims
UnverifiedEach GPT-5.6 model can be configured with different thinking intensities, with the highest level being Ultra.82% similarUnverifiedGPT-5.6 introduced an 'UltraFast' mode with inference speed improved by 2 to 3 times80% similarUnverifiedOpenAI introduced a new reasoning-intensity tier in GPT-5.6 called Ultra mode, which sits above the max tier.77% similar
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