Expired60% confidenceReleaseExact time
Anthropic has launched Claude Sonnet 5, whose overall performance closely approaches that of the flagship Opus 4.8.
2
Sources
60%
Confidence
Medium-term (~90 days)
Relevance
7/19/2026
First Seen
Valid until: 10/17/2026(expired)
Sources
Related Claims
UnverifiedAnthropic released Claude Sonnet 5, officially claiming its performance approaches that of Opus 4.8 at a lower price83% similarVerifiedAnthropic officially launched Claude Sonnet 5, officially positioned as "the most Agentic Sonnet model."82% similarUnverifiedClaude Sonnet 4 is a mid-tier model released by Anthropic in mid-2025, with a score on SWE-bench that significantly leads models of the same tier80% similar
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