Expired50% confidenceFactExact time
In the official documentation for GPT-5.6, 272k is marked as the 'doubled context' threshold: beyond this threshold, the input portion is billed at 2x, the output portion at 1.5x, and cache read costs increase proportionally.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
7/19/2026
First Seen
This claim has expired. It is kept for the record and no longer describes the current state.
Valid until: 10/17/2026(expired)
Sources
Related Claims
UnverifiedGPT-5.6 supports explicit cache breakpoints, with cache hits billed at a 10% rate.80% similarUnverifiedThe caching mechanism cost of GPT-5.6 has increased slightly.76% similarUnverifiedGPT-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.74% 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.74% similarUnverifiedCompared to GPT-5.5, GPT-5.6 consumes approximately one-third of the Tokens per PR, and the median completion time is nearly halved.74% similar
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