ValiantLabs/gemma-4-12B-it-Esper4

TEXT GENERATIONConcurrent Unit Cost:1Model Size:12BQuant:FP8Context Size:32kTool Calling:SupportedPublished:Jul 15, 2026License:apache-2.0Architecture:Transformer0.0K Open Weights Featherless Exclusive Cold

ValiantLabs/gemma-4-12B-it-Esper4 is a 12 billion parameter instruction-tuned model built on Gemma 4, developed by Valiant Labs. It specializes in agentic coding, architecture, DevOps, and MLOps tasks, leveraging high-difficulty training data in these domains. This model is optimized for complex technical problem-solving and AI development, designed for efficient inference on local and server environments with a 32768 token context length.

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Esper 4: Agentic Specialist for DevOps, MLOps, and Coding

Esper 4 is a 12 billion parameter model from Valiant Labs, fine-tuned on the Gemma 4 architecture. It is specifically designed as an agentic expert in several technical domains, including coding, software architecture, DevOps, and MLOps. The model's specialization is driven by its training on unique, high-difficulty datasets.

Key Capabilities

  • DevOps and Architecture Expertise: Maximizes helpfulness in DevOps and architecture tasks, powered by challenging data generated with DeepSeek-V4-Pro.
  • Improved Coding Performance: Tackles complex coding challenges through training on advanced agentic coding queries.
  • AI Development Focus: Enhanced for AI development, research, deployment, interpretability, operation, and experimentation using high-difficulty AI coding and expertise data.
  • Efficient Inference: Its relatively small size allows for execution on local desktops and mobile devices, as well as super-fast server inference.

Use Cases

Esper 4 is suitable for developers and engineers requiring a dedicated assistant for:

  • Generating complex code solutions, particularly in agentic frameworks.
  • Designing and optimizing software architectures.
  • Automating and managing DevOps pipelines.
  • Assisting with MLOps workflows and AI development tasks.

It utilizes the standard gemma-4-12B-it prompt format and can be integrated into agentic frameworks or used as a standalone chat and code assistant.