Amazon Launches Strands Decider 2B as Open-Source AI Decision Model

Amazon Web Services (AWS) has officially launched Strands Decider 2B, an open-source model aimed at enhancing rapid decision-making for AI agents. Released on October 1, 2026, this model is built with 2 billion parameters, making it suitable for local hardware deployment.

The standout feature of Strands Decider 2B is its innovative “pointer head,” which consists of approximately 1 million parameters. This component allows the model to evaluate predefined options and select the best one swiftly, without the need for generating text word by word. This design not only reduces token usage—critical for cost management in AI operations—but also enhances decision-making speed, reportedly allowing decisions to be made in under 100 milliseconds on standard hardware like the NVIDIA RTX 3090.

In benchmarking tests using JevBench, Strands Decider 2B achieved a perfect score on the easy tier and ranked second overall among public models with similar parameters. It leads in performance among models that come with a comprehensive training recipe. The model is accessible for download on Hugging Face, with its training data and scripts available on GitHub.

Strands Decider 2B is part of AWS's broader Strands Agents program, which focuses on providing efficient, open-source decision-making tools tailored for modern AI applications. This release follows the introduction of TypeSafe AI's Jev model, positioning Strands Decider 2B as a competitive open-source alternative in the emerging category of “system one” models, which are designed for fast, routine decision-making.

While the pointer-head approach offers significant advantages in speed and efficiency, it is limited to tasks requiring predefined options, indicating that traditional language models will still be necessary for more complex decision-making scenarios. As the AI landscape evolves, the introduction of Strands Decider 2B is expected to intensify competition, particularly impacting companies like Anthropic as they navigate their market positioning.