Claude 3.5 Sonnet (upgraded)
Released
Claude 3.5 Sonnet (upgraded) is an AI model released by Anthropic on Tuesday, Oct 22 2024, the same day as Claude 3.5 Haiku. Benchmark results (shown below) cover SWE-Bench Verified.
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Frequently asked questions
Claude 3.5 Sonnet (upgraded) was released by Anthropic on Tuesday, Oct 22 2024.
Claude 3.5 Sonnet (upgraded) was built by Anthropic. AI safety company building the Claude family of models. Founded in 2021 by former OpenAI researchers.
Claude 3.5 Sonnet (upgraded) reports 1 tracked benchmark score — SWE-Bench Verified: 49%. Scores are the figures published at release by Anthropic.
No. Claude 3.5 Sonnet (upgraded) is a proprietary model. The weights are not published — it is available only through the provider's own API, apps, or partner platforms.
Anthropic's previous tracked release was Claude 3.5 Haiku on Oct 22 2024. It was followed by Claude 3.7 Sonnet on Feb 24 2025.