promotion/Llama-3.1-8B-NBPO-UltraFeedback-600updates

TEXT GENERATIONPricing:Input $0.2 / Cached $0.028 / Output $0.32Concurrent Unit Cost:1Model Size:8BQuant:FP8Context Size:32kTool Calling:SupportedPublished:Sep 7, 2026License:llama3.1Architecture:Transformer Featherless Exclusive Cold

Llama-3.1-8B-NBPO-UltraFeedback-600updates is an 8 billion parameter language model developed by promotion, based on the Llama-3.1-8B-Instruct backbone. This model is fine-tuned using Nash Bargaining Preference Optimization (NBPO) on the UltraFeedback dataset, specifically optimized for instruction following, truthfulness, honesty, and helpfulness. It features a 32768 token context length and is designed for applications requiring robust adherence to instructions and ethical AI principles.

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Model Overview

This model, Llama-3.1-8B-NBPO-UltraFeedback-600updates, is an 8 billion parameter language model built upon the meta-llama/Llama-3.1-8B-Instruct backbone. It has been fine-tuned using the Nash Bargaining Preference Optimization (NBPO) method, specifically targeting the UltraFeedback dataset. The training involved 300 optimizer updates with a global batch size of 16, as detailed in the Appendix of the Nash Bargaining Preference Optimization paper regarding optimizer-budget sensitivity.

Key Capabilities

  • Instruction Following: Optimized to accurately follow user instructions.
  • Truthfulness & Honesty: Enhanced for generating factually correct and honest responses.
  • Helpfulness: Designed to provide useful and relevant information.
  • Robustness: Evaluated for objective-wise win rate against a common reference using Llama-3.3-70B-Instruct on prompt-disjoint held-out prompts.

Good For

  • Applications requiring high fidelity in instruction adherence.
  • Use cases where truthfulness and honesty are critical, such as factual Q&A or content generation.
  • Scenarios demanding helpful and ethical AI interactions.