Unverified50% confidenceFactExact time
GPT-5.6's default context has been increased to 350K tokens, and paired with an improved compression algorithm, its resistance to context contamination has been enhanced.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
7/24/2026
First Seen
Valid until: 10/22/2026
Sources
GPT-5.6深度评测：Sol、Terra、Luna三模型选型完全指南
youtubeTheo - t3․gg7/12/2026
Related Claims
UnverifiedIt is recommended to keep the GPT-5.6 context window within 272k as much as possible in order to balance cost and quality.80% similarPartially VerifiedGPT-5.6 has improved the prompt caching mechanism by adding explicit cache breakpoints, with a minimum cache retention of 30 minutes and output speeds of up to hundreds of tokens per second.77% similarUnverifiedGPT-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.77% similarUnverifiedThe caching mechanism cost of GPT-5.6 has increased slightly.76% similarVerifiedGPT 5.5 has significantly higher token efficiency, consuming fewer computing resources to complete the same tasks.76% similar
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