Expired50% confidenceFactExact time
Anthropic's Claude requires the prefix length to exceed 1,024 tokens before triggering Prompt Caching, while OpenAI automatically caches in granularities of 128 tokens.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
7/11/2026
First Seen
This claim has expired. It is kept for the record and no longer describes the current state.
Valid until: 10/9/2026(expired)
Sources
Related Claims
UnverifiedAnthropic要求缓存的最小单位是1024个Token，OpenAI以128个Token为粒度进行缓存匹配69% similarUnverifiedA 200K token context request requires approximately 25× the KV-Cache memory compared to an 8K token request.66% similarUnverified1 token is approximately equal to 0.75 English words, and modern models have extended the context window limit to 128K tokens.65% similarUnverifiedA log study measured the tokens each harness sends before reading the user's prompt: OpenCode approximately 7,000 tokens, CloudCode approximately 33,000 tokens, and Pi approximately 1,300 tokens.65% similarUnverifiedTaking LLaMA-2 70B as an example, when processing a 4096-token context with a batch size of 32, the KV Cache can consume over 80 GB of memory.61% similar
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