Introducing Unreal Agent: An open-source harness with state-of-the-...
Unreal Labs@unreallabsai
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Sep 23, 2026
~1 min read
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Introducing Unreal Agent:
An open-source harness with state-of-the-art cost efficiency
39% cheaper than Codex+Astra on Terminal-Bench 4.0 while maintaining performance
An open-source harness with state-of-the-art cost efficiency
39% cheaper than Codex+Astra on Terminal-Bench 4.0 while maintaining performance
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Unreal Agent is a general-purpose harness with frontier efficiency both at coding and non-coding benchmarks
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Unreal Agent is built around asynchronous execution. Tools run independently of model turns, so the model can start long-running tasks, continue other work, and use results as they arrive.
Efficiency comes from the async execution loop, a single bash tool, and a system prompt that encourages the agent to batch independent tool calls. More in our blog:
unreallabs.ai/blog/unreal-ag…
Efficiency comes from the async execution loop, a single bash tool, and a system prompt that encourages the agent to batch independent tool calls. More in our blog:
unreallabs.ai/blog/unreal-ag…
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If you’re interested in optimizing or deploying cost-efficient agents in your company - reach out to contact@unreallabs.ai
unreallabs.ai
unreallabs.ai
