Stealth 1M Model Ox Alpha Drops: Hands-On Review & Multi-Platform Free Access Guide

💡 Key Highlights: On August 20, 2026, the developer community on OpenRouter and OpenCode was buzzed by the sudden drop of a new anonymous model code-named Ox Alpha (stealth/ox-alpha). 1. Unmatched Flagship Specs: Features a massive 1,048,576-token (1M) input context window and a 131,072-token (128K) max output, and stands as the first model in the stealth series with native Text + Image + Video multimodal input. 2. Built for Autonomous Agents & Long-Horizon SWE: Delivers exceptional performance in whole-repo refactoring, multi-file code search, test generation, and complex multi-step reasoning. 3. 100% Free During Preview + Zero-Retention Privacy: Currently free on OpenRouter and OpenCode Zen (Zen requires a one-time $20 deposit for account verification). Explicitly operates under a strict Zero-Retention policy (prompts and completions are not logged or used to train future models). 4. Drop-in OpenAI Compatible: Standard API format ready for Cursor, OpenCode CLI, Zed, Claude Code, Aider, Python, and cURL.

🎭 1. The Stealth Tradition: What is Ox Alpha?

Frontier AI labs frequently launch unannounced models on platforms like OpenRouter or LMSYS under "Stealth" labels to evaluate performance under real-world developer workloads before official launch.

Historical stealth models on OpenRouter (such as GLM-5, MiMo-V2-Pro, Ling-2.6-flash, and LongCat-2.0) were eventually revealed to be flagship offerings from leading labs. Ox Alpha raises the bar even higher by offering a full 1M context window alongside first-class video diagnostic support.

⚡ 2. Core Strengths & Why You Should Try It Now

Following recent API price adjustments across the industry, Ox Alpha arrives as a timely, high-leverage tool:

1. 1M Context Window + 128K Output

• Feed Whole Repositories: Ingest complete TypeScript/Python codebases without complex RAG chunking.
• Generate Entire Modules: Single-pass generation of full microservices and comprehensive test suites without truncated outputs.

2. Full Multimodal Input (Text + Image + Video)

• Video Bug Troubleshooting: Drop a 10-second screen recording (MP4/WebM) into the model; it cross-references visual UI glitches with your code.
• Figma to Code: Converts high-res design screenshots into clean, accessible components.

3. Transparent Free Tier & Privacy

• Free Preview Status: Both input and output tokens are priced at $0.00 / 1M tokens during the preview phase.
• Platforms:
• OpenRouter: Direct access with your API key.
• OpenCode Zen: Free within the Zen model catalog after an initial $20 non-expiring balance activation.
• Zero-Retention Guarantee: Unlike models requiring data-sharing opt-ins, Ox Alpha explicitly guarantees zero user data retention.

📊 3. 1M Context Models Comparison

🛠️ 4. Quick Start: cURL & Python

cURL

curl https://openrouter.ai/api/v1/chat/completions \
  -H "Authorization: Bearer $OPENROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "stealth/ox-alpha",
    "messages": [
      {"role": "user", "content": "Analyze potential concurrency bottlenecks in this architecture..."}
    ]
  }'

Python (OpenAI SDK)

import os
from openai import OpenAI

client = OpenAI(
    base_url="https://openrouter.ai/api/v1",
    api_key=os.environ.get("OPENROUTER_API_KEY"),
)

response = client.chat.completions.create(
    model="stealth/ox-alpha",
    messages=[{"role": "user", "content": "Refactor this TypeScript codebase..."}],
    stream=True,
)

for chunk in response:
    if chunk.choices[0].delta.content:
        print(chunk.choices[0].delta.content, end="", flush=True)
print()

🔗 Official Links & Access Portals:
- 👉 OpenCode Go Subscription ($5 First Month Deal)
- 👉 OpenCode Zen Console ($20 Activation for Ox Alpha / Muse Spark 1.2 Free Access)
- 👉 OpenRouter Models Catalog
- 👉 Free AI API Directory