Unverified50% confidenceBenchmarkExact time
Using Claude Haiku 4.5 on Amazon Bedrock, after the fix the cache reads for messages 2 and 3 were both 18,767 tokens, with cache writes of 597 and 620 tokens respectively.
1
Sources
50%
Confidence
Short-term (~14 days)
Relevance
10/18/2026
First Seen
Valid until: 11/1/2026
Sources
Related Entities
Related Claims
UnverifiedClaude Haiku 5.5's context window has expanded from Haiku 4.5's 200,000 tokens to 1 million tokens, and the output limit has been raised from 64K to 128K.70% similarUnverifiedBefore the fix, the cache reads for messages 2 and 3 were 0, with cache writes of about 19,600 tokens per message.69% similarUnverifiedBoth cache read and cache write token counts are included in determining Haiku 5.5's 100K pricing threshold, so caching cannot help avoid the pricing cliff.67% similarUnverifiedThe minimum cacheable length for Haiku 5.5 is 512 tokens, and prompts shorter than this will not error but will not be cached; a cache entry only becomes available after the first response begins; by default the cache lives for 5 minutes and is refreshed for free on each hit.65% similarUnverifiedIn an AWS sample application, across 28 calls reviewing the same document, CloudWatch recorded 196,680 tokens written to cache and 0 reads, because the cache point was placed after each entry's own instructions; after moving the cache point to after the document, the second entry immediately became a read of 4,624 tokens.63% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/1057705API
curl https://kongchang.com/api/v1/knowledge/claims/1057705MCP
get_claim(id=1057705)