Artificial intelligence · 2024

Claude 3.5 Sonnet

A mid-size model beats the previous flagship, and becomes a favourite for coding.

Released June 20, 2024, Claude 3.5 Sonnet outperformed Claude 3 Opus at twice the speed and a fifth of the cost, and introduced Artifacts. An upgraded version in October 2024 raised SWE-bench Verified to 49%.

See it in the living tree Wikipedia

Arcs above join it to what it stood on, arcs below to what it led to. The bar places this stretch on the tree's whole timeline.

What it built on 1

Claude 3 family 2024

What it led to 2

Computer use agents 2024
Claude 3.7 Sonnet 2025

Watch

Claude 3.5 Sonnet for agentic codingAnthropic · YouTube

Related measurements

The dashed line marks when it first worked.

Best AI score on GPQA Diamond Latest: 95.8 % correct (2026) Source: Epoch AI, Capabilities & benchmarking (benchmark_data.zip, gpqa_diamond.csv); Anthropic: Claude 3 public launch (March 4, 2024)

Training compute of notable AI models Source: Epoch AI, Notable AI Models (CC BY 4.0)