ValiantLabs/Qwen3-4B-Thinking-2507-Esper3.1

Hugging Face
TEXT GENERATIONPricing:Input $0.4 / Cached $0.08 / Output $0.8Concurrent Unit Cost:1Model Size:4BQuant:BF16Context Size:32kTool Calling:SupportedPublished:Oct 6, 2025License:apache-2.0Architecture:Transformer0.0K Open Weights Featherless Exclusive Warm

ValiantLabs/Qwen3-4B-Thinking-2507-Esper3.1 is a 4 billion parameter model built on the Qwen 3 architecture, specifically fine-tuned for specialized reasoning tasks. It excels in DevOps, architecture, and coding performance, leveraging high-difficulty datasets in these domains. This model is optimized for local desktop, mobile, and fast server inference, making it suitable for resource-constrained environments requiring expert-level technical assistance.

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Esper 3.1: Specialized Reasoning for DevOps, Architecture, and Coding

ValiantLabs/Qwen3-4B-Thinking-2507-Esper3.1 is a 4 billion parameter model from Valiant Labs, part of the Esper 3.1 series built upon the Qwen 3 foundation. This model is specifically engineered to provide expert-level reasoning in technical domains, distinguishing itself through targeted training on high-difficulty datasets.

Key Capabilities

  • DevOps and Architecture Expertise: Maximizes helpfulness in DevOps and architectural design, powered by challenging data generated with DeepSeek-V3.1-Terminus.
  • Improved Coding Performance: Handles complex coding tasks through fine-tuning on advanced code-reasoning datasets like Tachibana3-Part1-DeepSeek-V3.1-Terminus and Tachibana3-Part2-DeepSeek-V3.2.
  • AI Expertise: Boosts MLOps, AI architecture, AI research, and general reasoning skills using high-difficulty AI expertise data from Mitakihara-DeepSeek-R1-0528.
  • Efficient Inference: Designed for deployment on local desktops, mobile devices, and for super-fast server inference due to its optimized size.

Good For

  • Developers and engineers requiring a dedicated AI assistant for DevOps tasks and system architecture design.
  • Users needing assistance with challenging coding problems and code reasoning.
  • Professionals in MLOps, AI research, and AI architecture seeking specialized AI expertise.
  • Applications where fast inference and resource efficiency are critical, such as local or mobile deployments.