When was Claude 3.5 Sonnet (upgraded) released?

Claude 3.5 Sonnet (upgraded) was released by Anthropic on Tuesday, Oct 22 2024.

Who made Claude 3.5 Sonnet (upgraded)?

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.

What benchmark scores did Claude 3.5 Sonnet (upgraded) get?

Claude 3.5 Sonnet (upgraded) reports 1 tracked benchmark score — SWE-Bench Verified: 49%. Tracked scores may come from lab reports or independent benchmarks; source details accompany the benchmark data.

Is Claude 3.5 Sonnet (upgraded) open source?

No. Claude 3.5 Sonnet (upgraded) is a closed model. The weights are not published — it is available only through the provider's own API, apps, or partner platforms.

What came before and after Claude 3.5 Sonnet (upgraded)?

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.

Claude 3.5 Sonnet (upgraded)

Released Oct 22 2024

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.

Claude 3.5 Sonnet (upgraded)

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