Unverified50% confidenceBenchmarkExact time
Opus-4-8's raw capability is 10 percentage points higher than sonnet-4-6's, but its scope compliance capability is 35.6 percentage points higher.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
9/28/2026
First Seen
Valid until: 12/27/2026
Sources
Related Entities
Related Claims
UnverifiedThe previous-generation Claude OPUS had a success rate of only 1.4% on a certain high-difficulty leaderboard, whereas Fable 5 reached approximately 30%, an improvement of more than 20 times.70% similarUnverifiedIn agentic search tests, Sonnet 5 outperformed Sonnet 4.6 across all effort levels, but its overall performance was below Opus 4.8, placing it at approximately the Opus 4.7 level overall.70% similarUnverifiedMore tool calls do not necessarily lead to better performance; Claude Opus 4.7 has a very high tool-call frequency but a lower accuracy rate than Gemini and Doubao, which make fewer calls.69% similarUnverifiedOpus 5's pass rate at Low Effort is approximately 60%, surpassing Opus 4.8's 59% at the Max level, for which the per-task cost is as high as $13.68% similar
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