Expired60% confidenceOpinionExact time
Sonnet 5 is not a token-efficient model; it consumes a large number of extra tokens on agentic tasks, causing the actual API cost to be higher than that of Opus 4.8
2
Sources
60%
Confidence
Medium-term (~90 days)
Relevance
7/20/2026
First Seen
This claim has expired. It is kept for the record and no longer describes the current state.
Valid until: 10/18/2026(expired)
Sources
Related Claims
UnverifiedThe author advises developers to recalculate actual token consumption and total cost using the new tokenizer before making migration decisions, and does not recommend rushing to adopt Sonnet 5 as the primary model.74% similarVerifiedTokens not only affect the model's comprehension capability but also directly affect the cost of API calls.69% similarUnverifiedAPI output tokens typically cost 2-5x more than input tokens because text generation requires more computational resources, with each generated token requiring a complete autoregressive decoding process.67% similarUnverifiedThe tokenizer switch was designed to keep the introductory pricing of Sonnet 5 approximately cost-neutral.66% similarUnverifiedThe majority of AI coding costs come from input tokens rather than output tokens.64% similar
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