AnalysisAI ModelsOctober 2, 2026

Claude Sonnet 5.5, GPT-6.1 Sol and Gemini 4 Argon top Coding Agent Index

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Claude Sonnet 5.5 (max) in Claude Code leads the Artificial Analysis Coding Agent Index at 68, but carries the highest measured cost per task at $14.19. The three models launched within days of each other, each with a different balance of performance and cost.

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