Claude
80cd21f89b
Co-Authored-By: Claude Sonnet 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_01JXVi2GMQ7bR5EmbUFdDj7N
19 lines
1.2 KiB
Plaintext
19 lines
1.2 KiB
Plaintext
# Prompt caching: what each client sends and what Usage reports
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A. Anthropic: the strategy decides whether the system prompt carries a cache breakpoint
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strategy NONE system is a plain string
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call 1: promptTokens=6014 cacheRead=0 cacheWrite=0
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call 2: promptTokens=6014 cacheRead=0 cacheWrite=0
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strategy SYSTEM_ONLY system is a list of 1 block(s), cache_control on block 0: true
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call 1: promptTokens=3 cacheRead=0 cacheWrite=6011
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call 2: promptTokens=3 cacheRead=6011 cacheWrite=0
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B. OpenAI and Gemini: nothing to switch on, but the order of the text decides the hit
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OPENAI timestamp AFTER the policy: call 1 cacheRead=0 call 2 cacheRead=6016 of 6019 prompt tokens
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OPENAI timestamp BEFORE the policy: call 1 cacheRead=0 call 2 cacheRead=0 of 6019 prompt tokens
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GEMINI timestamp AFTER the policy: call 1 cacheRead=0 call 2 cacheRead=6016 of 6019 prompt tokens
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GEMINI timestamp BEFORE the policy: call 1 cacheRead=0 call 2 cacheRead=0 of 6019 prompt tokens
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C. A prompt below the vendor's minimum: the client still asks, the vendor does not cache
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Anthropic SYSTEM_ONLY, 847-character policy: cache_control sent=true, cacheRead=0 cacheWrite=0
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