---
library_name: transformers
license: apache-2.0
pipeline_tag: text-generation
base_model:
- Qwen/Qwen3.5-9B
---
## Introduction
We are proud to introduce **OxCoder-9B**, our lightweight coding model for long-horizon tasks, agentic coding, and agentic reasoning. Despite featuring only 9 billion parameters, OxCoder-9B marks a substantial leap in agentic capabilities — particularly in **Agentic Terminal** and **Agentic Coding** tasks — punching far above its weight class and rivaling models many times its size. This release represents our strongest commitment yet to delivering frontier-level agentic performance in a compact, efficient, and openly accessible package.
- **Trained on Frontier Agent Traces:** Built from Fable-5.1 and GLM-5.3 agentic coding trajectories across Claude Code, OpenCode and Codex — OxCoder-9B has been distilled from some of the most capable agentic systems available, giving it a unique advantage in real-world software engineering scenarios.
- **262K Native Context:** Equipped with a full 262,144 token native context window, enabling the model to handle complex, multi-file codebases and long-horizon reasoning tasks with ease.
- **Error Recovery:** Learns read-before-write patterns, responds to LSP diagnostics, and applies minimal edit diffs instead of full rewrites — making it robust in iterative coding environments where precision matters.
- **Front-end Reasoning:** OxCoder-9B exhibits remarkably strong front-end reasoning capabilities for its size, demonstrating a deep understanding of UI logic, component architecture, and web-native patterns that is rare in sub-10B models.
## Benchmark
| |
OxCoder-9B |
Ornith-1.5-9B |
Ornith-1.0-9B |
Qwen3.5-9B |
Gemma-4-31B |
| Coding |
Agentic terminal coding Terminal-Bench 2.1 (Terminus-2) |
49.6 |
46.2 |
43.1 |
21.3 |
42.1 |
Agentic terminal coding Terminal-Bench 2.1 (Claude Code) |
50.8 |
47.0 |
40.6 |
18.9 |
— |
Agentic coding SWE-bench Verified |
73.5 |
70.6 |
69.4 |
53.2 |
52.0 |
Real-world software engineering SWE-bench Pro |
49.1 |
47.5 |
42.9 |
31.3 |
35.7 |
Repo-level code generation NL2Repo |
36.2 |
32.4 |
27.2 |
16.2 |
15.5 |
| Reasoning |
Expert-level reasoning HLE (no tools) |
21.2 |
20.2 |
16.8 |
14.7 |
19.5 |
Tool-augmented reasoning HLE (with tools) |
32.8 |
30.5 |
26.4 |
24.5 |
26.5 |
Scientific reasoning GPQA Diamond |
86.9 |
86.4 |
82.5 |
81.7 |
84.3 |
| Agentic |
Multi-tool orchestration MCP-Atlas |
56.7 |
54.2 |
49.4 |
46.8 |
55.0 |
Web browsing and research BrowseComp |
57.4 |
56.4 |
44.8 |
41.5 |
— |
Real-user agentic coding ClawEval |
67.8 |
66.5 |
63.1 |
53.2 |
48.5 |
* All results reported for OxCoder-9B are averaged over five independent runs. A dash (—) means the score was not reported for that model.
* Terminal-Bench 2.1 (Terminus-2): We evaluate Terminal-Bench 2.1 using the Harbor/Terminus-2 framework with parser=json, temperature=1.0, top_p=1.0, and a 256K context window. Each run uses a 2-hour timeout with 32 CPU cores and 32GB RAM.
* Terminal-Bench 2.1 (Claude Code): We evaluate Terminal-Bench 2.1 using Claude Code 2.1.126 with parser=json, temperature=1.0, top_p=1.0.
* SWE-bench Verified and Pro: using the OpenHands harness with temp=1.0, top_p=0.95, 256K context window. Anti-hacking safeguards are applied throughout evaluation: Git history is removed from the local repository image to prevent access to prior solutions or commits; network access is disabled, preventing the model from retrieving external information or resources.
* NL2Repo: with temperature=1.0, top_p=1.0, 256K context, 48K output. Access to the specified GitHub repositories and pip packages is blocked to prevent reward hacking.
* HLE: Evaluated using GLM-5.3 as the judge model.
* MCP-Atlas: Evaluated using GLM-5.3 as the judge model.
* ClawEval: temp=0.6 and 256K context.
* Baseline scores for Ornith-1.5-9B, Ornith-1.0-9B, Qwen3.5-9B and Gemma-4-31B are taken from the Ornith-1.5-9B model card and were produced under that team's evaluation settings, which differ from ours on some benchmarks (context window, timeouts and judge model).
---
**OxCoder-9B** is developed by **[OrionLLM](https://huggingface.co/OrionLLM)** and released under the Apache 2.0 License.