{"slug": "ox-alpha", "title": "ox-alpha", "summary": "An anonymous reasoning model called 'stealth/ox-alpha' has been available free on OpenRouter since Aug 20, 2026, with undisclosed operators but community fingerprinting suggesting it is an unreleased multimodal sibling of Z.ai's GLM-5.3. On the Agents on Rails benchmark (Aug 2026, Le Mans round), it scored 82.5% accuracy on 63 runs, tying with Grok 4.6 and trailing the Opus 5 / Kimi K3 / Fable 5 cluster, with a median inference time of 19 minutes 26 seconds. The model offers 1M context, 131K max output, text/image/video input, and text output, with mandatory reasoning levels.", "body_md": "# ox-alpha\n\npremier**An anonymous “stealth” reasoning model** served free on OpenRouter (`stealth/ox-alpha`\n\n) starting Aug 20, 2026. The operator is undisclosed; community tokenizer + error-code fingerprinting strongly suggests Z.ai’s GLM-5.x family (an unreleased multimodal sibling of GLM-5.3), but no lab has claimed it.\n\n**Specs:** 1M context, 131K max output, text/image/video in, text out, mandatory reasoning (low/high/max). Free during the preview (~$0 in/out).\n\n**Agents on Rails benchmark (Aug 2026, Le Mans round).** 82.5% accuracy on 63 runs - tied with Grok 4.6 and behind only the Opus 5 / Kimi K3 / Fable 5 cluster. API recall 28.6%. Slow (19m 26s median, the third-slowest field) but strong. Treat identity and numbers as preliminary until the reveal; if the GLM fingerprint holds, it is a mid-tier frontier coder at preview price.\n\n- 1000k\n- proprietary\n- Undisclosed\n- Aug 2026\n\n## Scores\n\n## Or run it in the cloud\n\nLive per-provider pricing, throughput and uptime - refreshed about 1 hour ago via OpenRouter. Click a column to sort.\n\n| Provider | Type | Input $/M | Output $/M | Cache $/M | Tok/s | Latency | Uptime | Value |\n|---|---|---|---|---|---|---|---|---|\n| API | 0.00 | 0.00 | - | - | - | - | cheapest |\n\nDefault order: throughput among 95%+ uptime providers, then latency; subscriptions last. Sort by any column. Subscription rows show $/mo in the Value column - per-token columns are \"-\". Affiliate links are marked sponsored / nofollow. Confirm current pricing on the provider's site before committing.\n\n[Detailed API pricing page + JSON endpoint →](/models/ox-alpha/pricing)\n\n## Inference cost over time\n\nData accumulates from the first daily sync - longer ranges populate over time. Prices come from OpenRouter snapshots, not a historical API.", "url": "https://wpnews.pro/news/ox-alpha", "canonical_source": "https://tokenstead.ai/models/ox-alpha", "published_at": "2026-08-24 21:54:59+00:00", "updated_at": "2026-08-24 22:45:08.300851+00:00", "lang": "en", "topics": ["artificial-intelligence", "large-language-models", "ai-products"], "entities": ["OpenRouter", "Z.ai", "GLM-5.3", "Grok 4.6", "Opus 5", "Kimi K3", "Fable 5"], "alternates": {"html": "https://wpnews.pro/news/ox-alpha", "markdown": "https://wpnews.pro/news/ox-alpha.md", "text": "https://wpnews.pro/news/ox-alpha.txt", "jsonld": "https://wpnews.pro/news/ox-alpha.jsonld"}}