morriszjm/Tacit-2B

VISIONPricing:Input $0.32 / Cached $0.064 / Output $1.6Concurrent Unit Cost:1Model Size:2.3BQuant:BF16Context Size:32kTool Calling:SupportedPublished:Oct 5, 2026License:apache-2.0Architecture:Transformer Open Weights Featherless Exclusive Cold

morriszjm/Tacit-2B is a 2.3 billion parameter language model, built on Qwen/Qwen3.5-2B, specifically designed for making typed decisions (choice, yes/no, score) in a single forward pass. It utilizes AnyJev self-distillation, where the base model generated its own decision problems and learned to answer them efficiently. This model excels at decision-making tasks, achieving a 3.0 percentage point improvement over its base model on benchmarks like JevBench and bev-decision, making it suitable for applications requiring fast, probabilistic decision outputs.

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Tacit-2B: Efficient Typed Decision-Making

Tacit-2B is a 2.3 billion parameter language model, derived from Qwen/Qwen3.5-2B, engineered for rapid, typed decision-making. Unlike general-purpose LLMs, Tacit-2B specializes in outputting a probability distribution over predefined options (e.g., choosing from a list, answering yes/no, or selecting an ordered level) in a single forward pass. This specialization is achieved through a unique AnyJev self-distillation process, where the model autonomously generated and learned from its own decision problems, without relying on human labels or external datasets.

Key Capabilities

  • Single-Pass Decision Output: Provides probabilistic answers for typed decisions (choice, yes/no, score) in one forward pass, optimizing for speed and efficiency.
  • Adaptive Reasoning: Supports an optional adaptive mode where low-confidence decisions can be escalated to the model's own reasoning process (Chain-of-Thought) for improved accuracy, while still providing probabilities.
  • Self-Distilled Training: Leverages a novel self-distillation method, allowing the model to learn robust decision-making directly from its own generated data.
  • vLLM Integration: Designed for high-throughput serving with vLLM, supporting both in-process and server-based deployments.

Good For

  • Automated Customer Support: Quickly categorizing customer inquiries or determining next steps based on user input.
  • Interactive Systems: Powering applications that require fast, structured responses to user choices or questions.
  • Decision Automation: Implementing systems where a model needs to select from a fixed set of options with high confidence and speed.
  • Resource-Constrained Environments: Its 2.3B parameter size makes it efficient for deployment where computational resources are a consideration, while still offering specialized performance.