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Ten Sonnet 5.5 AI agents conducted 15 hours of autonomous research to solve a mathematical problem from 1904, producing a proof with 17,895 lines.
A user shares how integrating jev with sonnet 5.5 and adding 6 lines to CLAUDE.md made their workflow 4x faster, providing rules for effective Claude usage.
GPT-6 Sol is more cost-efficient than Sonnet 5.5 at similar budgets, but Sonnet 5.5 achieves higher performance at increased costs, according to Artificial Analysis data.
Sonnet 5.5 AI model is now available in Cursor, performing on par with Opus in various tasks.
Claude has released Sonnet 5.5, a faster and more cost-effective upgrade over Sonnet 5 that fixes a bug with Claude Code.