---
license: gemma
base_model: google/gemma-4-26B-A4B-it
library_name: transformers
pipeline_tag: text-generation
language:
  - en
tags:
  - gemma4
  - code
  - opencode
  - reasoning
  - tool-calling
  - bf16
---

# Gemma 4 OpenCoder 40B-A8B BF16 v2

Gemma 4 OpenCoder 40B-A8B v2 is a continued post-trained Gemma 4 coding
model focused on agentic software engineering, long-context reasoning, and
reliable tool use. It is designed for OpenCode workflows including repository
navigation, implementation, editing, debugging, review, and sustained
multi-file work.

The checkpoint contains approximately **42.4B text parameters** and activates
approximately **8.1B text parameters** per token. It retains Gemma 4's native
**262,144-token context window**.

This BF16 release is a self-contained checkpoint using the standard Gemma 4
architecture. It does not require an adapter, external router, or auxiliary
model.

## Intended use

- Agentic software engineering
- OpenCode coding workflows
- Long-context codebase navigation
- Reasoning-enabled tool use
- Multi-file implementation and editing
- Debugging and code review

Run with reasoning and automatic tool calling enabled, and preserve the
checkpoint's included chat template.

## Model format

- Weight format: BF16 safetensors
- Architecture: Gemma 4 Mixture-of-Experts
- Total text parameters: approximately 42.4B
- Active text parameters: approximately 8.1B per token
- Maximum context: 262,144 tokens

## vLLM

```bash
vllm serve LLMWildling/gemma-4-opencoder-40b-a8b-bf16-v2 \
  --tensor-parallel-size 2 \
  --reasoning-parser gemma4 \
  --tool-call-parser gemma4 \
  --enable-auto-tool-choice \
  --max-model-len 262144
```

Adjust tensor parallelism and context length for the available hardware. For
OpenCode, select the served model and keep reasoning and tool calling enabled.