Best AI Agents for Software Development Ranked: A Benchmark-Driven Look at the Current Field

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<p>The AI coding agent field in 2026 is more capable, more fragmented, and harder to benchmark than it looks. Claude Code leads on code quality at 87.6% SWE-bench Verified. GPT-5.5 tops Terminal-Bench at 82.7%. But the benchmark OpenAI itself declared contaminated in February 2026 is still being used to rank these tools — including by the labs publishing their own scores.</p> <p>The post <a href="https://www.marktechpost.com/2026/05/15/best-ai-agents-for-software-development-ranked-a-benchmark-d

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