{"slug": "union-alpha-stealth-model", "title": "Union Alpha Stealth Model", "summary": "Union Alpha is a multimodal model built for research, coding, and agentic workflows that delivers frontier-level performance across diverse general-purpose tasks, according to third-party information. The model's documentation lists API parameters including temperature (0 to 2), max_tokens, top_p (0 to 1), frequency_penalty and presence_penalty (-2 to 2), stream, tools, and reasoning_effort, alongside example prompts for system guidance, coding, follow-up conversation, and creative writing.", "body_md": "- Third-party\n\nUnion Alpha is a multimodal model designed for research, coding, and agentic workflows. It delivers frontier-level performance across diverse general-purpose tasks.\n\n```\nParis\n```\n\n## **System Guidance** — Set a helpful system role before asking a question.\n\n```\nAn API (Application Programming Interface) is a set of rules that lets different software programs communicate with each other. For example, a weather app can use an API to request the latest forecast from a weather service.\n```\n\n## **Coding Example** — Ask for a short coding example.\n\njavascript\nfunction reverseString(str) {\n  return [...str].reverse().join(\"\");\n}\n\n// Example call:\nconsole.log(reverseString(\"hello\")); // \"olleh\"\n## **Follow-up Conversation** — Continue a short conversation with prior assistant context.\n\n```\nPrioritize **location over amenities** for a short weekend—you’ll get more out of your trip if you spend less time in transit.\n\n- **Your main activity:** Stay near the beach for a relaxing getaway, or near the center for restaurants, sightseeing, and nightlife.\n- **Walkability and transport:** Look for cafés and dinner options within walking distance, plus easy access to the airport or train station. If you’re driving, check parking costs.\n- **Total\n```\n\n## **Creative Writing** — Generate a compact piece of creative writing.\n\n```\nThe weary day sank softly out of sight,\nAnd left me searching shadows for a spark.\nThen one small star unfolded into light—\nEnough to lead me gently through the dark.\n```\n\n▶messages[]\n\n`array` required\ntemperature\n\n`number` minimum: 0maximum: 2\nmax_tokens\n\n`number` exclusiveMinimum: 0\nmax_completion_tokens\n\n`number` exclusiveMinimum: 0\ntop_p\n\n`number` minimum: 0maximum: 1\nfrequency_penalty\n\n`number` minimum: -2maximum: 2\npresence_penalty\n\n`number` minimum: -2maximum: 2\nstream\n\n`boolean`\n▶stream_options{}\n\n`object`\n▶tools[]\n\n`array`\ntool_choice\n\nresponse_format\n\n▶modalities[]\n\n`array`\n▶audio{}\n\n`object`\nreasoning_effort\n\n`string` Optional reasoning control; availability and accepted values are model-dependent.\nid\n\n`string`\nobject\n\n`string`\ncreated\n\n`number`\nmodel\n\n`string`\n▶choices[]\n\n`array`\n▶usage{}\n\n`object`", "url": "https://wpnews.pro/news/union-alpha-stealth-model", "canonical_source": "https://developers.cloudflare.com/ai/models/stealth/union-alpha/", "published_at": "2026-09-17 06:04:36+00:00", "updated_at": "2026-09-17 06:25:26.285139+00:00", "lang": "en", "topics": ["artificial-intelligence", "large-language-models", "ai-agents", "ai-tools"], "entities": ["Union Alpha"], "alternates": {"html": "https://wpnews.pro/news/union-alpha-stealth-model", "markdown": "https://wpnews.pro/news/union-alpha-stealth-model.md", "text": "https://wpnews.pro/news/union-alpha-stealth-model.txt", "jsonld": "https://wpnews.pro/news/union-alpha-stealth-model.jsonld"}}