beyoru/seul-preview

VISIONConcurrent Unit Cost:1Model Size:9BQuant:FP8Context Size:32kTool Calling:SupportedPublished:Jul 9, 2026License:apache-2.0Architecture:Transformer0.0K Open Weights Featherless Exclusive Cold

seul-preview is a new family of agentic language models developed by beyoru, designed for long-horizon reasoning and reliable business tool use. It is trained to maintain context across extended workflows, interact safely with enterprise tools, and improve through reinforcement learning with verifiable outcomes. This model focuses on stable multi-turn planning and verifiable execution rather than solely optimizing for benchmark performance. It is intended for applications requiring persistent context and robust tool interaction in business environments.

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Overview

seul-preview is an agentic language model developed by beyoru, designed with a primary focus on long-horizon reasoning and reliable enterprise tool use. Unlike models optimized solely for benchmark performance, seul aims to maintain context across extended workflows and interact safely with business tools. It is built to improve through reinforcement learning based on verifiable outcomes.

Key Capabilities

  • Long-horizon reasoning: Designed to handle complex, multi-step tasks over extended periods.
  • Reliable enterprise tool use: Engineered for safe and consistent interaction with business-specific tools.
  • Stable multi-turn planning: Capable of consistent planning across multiple conversational turns or operational steps.
  • Verifiable execution: Focuses on outcomes that can be verified, enhancing reliability in critical applications.
  • Efficient reinforcement learning: Incorporates mechanisms for continuous improvement through reinforcement.

Limitations

  • The current training process was conducted on a single domain, which may limit its generalizability.
  • Training was cut short due to GPU availability, potentially preventing the model from reaching its full capabilities.

Good for

  • Applications requiring persistent context in complex workflows.
  • Business environments needing reliable and safe tool interaction.
  • Use cases where verifiable execution and multi-turn planning are critical.