Show HN: Agent Runner – open-source agent harness to benchmark real coding(designarena.ai)
designarena.ai
Show HN: Agent Runner – open-source agent harness to benchmark real coding
https://www.designarena.ai/?arena=agents&harness=standard
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Why we built it Traditional benchmarks often fall short for modern agentic systems: they rely on static tasks and only measure final outputs. But real coding agents modify multiple files across a repo, answer to user re-prompts, use tool calls, and recover from partial failures
What Agent Runner does You ask it to build anything Agent Runner kicks off two generations from different sandboxed LLM providers (OpenAI, Anthropic, Google, xAI, Mistral, Kimi, and more) Anonymized models make tool calls, multi-file edits, and cater to reprompts You pick your favorite - this preference powers the benchmark
Because different providers handle tool calls, prompts, and execution semantics differently, we worked with each provider to ensure configurations reflect intended behavior. These provider-specific setups remain private, but Agent Runner itself is open-source.
How to try it Kick off Agent Runner at https://www.designarena.ai/agentarena Repo at https://github.com/Design-Arena/agent-runner Use it as a CLI tool: https://pypi.org/project/agent-runner/ pip install agent-runner agentrunner run “create a nextjs replica of Discord”
We hope this provides a provider-agnostic, framework-agnostic, realistic benchmark for state-of-the-art coding agents.
Video demo: https://youtu.be/rdtiuCHatjs