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Sep 30, 2026 · Artificial Intelligence
Claude Sonnet 5.5: The Cost-Effective Workhorse for AI Programming Agents
Claude Sonnet 5.5 delivers significant gains in agent-based programming with 70.6% on Terminal-Bench (vs 10.3% for Sonnet 5), 15x lower per-task cost on FrontierCode, and near-Opus performance on CursorBench, making it the optimal high-frequency execution layer for daily coding tasks while Opus handles complex architecture.
AI coding agentsClaude Sonnet 5.5CursorBench
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