autonomous coding agent. Strong tool use and planning and memory and self-correction capabilities. 28K GitHub stars.
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AgentBench evaluation reveals GPT-4 class models achieve ~44% overall success rate across 8 real-world agent environments, while open-source alternatives score 15-30% lower. Operating System and Database tasks show the largest capability gaps, highlighting the challenge of autonomous agent development.
Claude Code has emerged as the most adopted AI coding agent, with developers citing superior code understanding, autonomous task completion, and seamless IDE integration as key differentiators.
Tool invocation has seen consistent upward trend throughout 2025. Initially concentrated in GPT-4o-mini and Claude 3.5/3.7, tool use has diversified to Claude 4.5 Sonnet, Grok Code Fast, and GLM 4.5. Enabling tool use is becoming table stakes for enterprise adoption.
Anthropic published definitive guidance distinguishing 'workflows' (predefined orchestration) from 'agents' (dynamic self-directed systems). Key patterns: prompt chaining, routing, parallelization, orchestrator-workers, and evaluator-optimizer. Recommends simple patterns over complex frameworks.