Claude 3.5 Sonnet

Mid-tier model that surpassed Opus 3 on most benchmarks at Sonnet pricing — a breakthrough demonstrating that smaller, more efficient models could match or exceed larger predecessors. 200K token context. Updated in October 2024 with improved coding (64.0% SWE-bench Verified).

Claude 3.5 Sonnet became the most widely-used Claude model and one of the most popular API models globally, combining frontier intelligence with fast inference and low cost. Also introduced Computer Use (beta) for GUI interaction. AA Intelligence Index: 16 (October update). Proprietary.