Unverified50% confidenceBenchmarkExact time
On the codebase audit benchmark task, Sonnet's cost was approximately half that of Opus but scored slightly higher, achieving the best cost-per-point, and Sonnet took only about 5 minutes while Opus took nearly twice as long.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
10/2/2026
First Seen
Valid until: 12/31/2026
Sources
Related Entities
Related Claims
UnverifiedIn agentic coding work, the proportion of cache reads in total cost is under 5% in Fable, close to 20% in Opus, and potentially over 50% in Sonnet 5.5.77% similarUnverifiedThe tokenizer switch was designed to keep the introductory pricing of Sonnet 5 approximately cost-neutral.71% similarUnverifiedSonnet 5.5's cache read cost remained at $0.20 per million tokens with no reduction, whereas Fable 5.1 cut it by 90% and Opus cut it by approximately 60%.68% similarUnverifiedSonnet is a balanced version of performance and cost, and is the officially recommended tier for everyday use by default.65% similarUnverifiedThe core selling point of Sonnet 5.5 is faster response speed and lower token consumption.64% similar
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