ox-alpha

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.

ox-alpha premier An anonymous “stealth” reasoning model served free on OpenRouter stealth/ox-alpha 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. Specs: 1M context, 131K max output, text/image/video in, text out, mandatory reasoning low/high/max . Free during the preview ~$0 in/out . 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. - 1000k - proprietary - Undisclosed - Aug 2026 Scores Or run it in the cloud Live per-provider pricing, throughput and uptime - refreshed about 1 hour ago via OpenRouter. Click a column to sort. | Provider | Type | Input $/M | Output $/M | Cache $/M | Tok/s | Latency | Uptime | Value | |---|---|---|---|---|---|---|---|---| | API | 0.00 | 0.00 | - | - | - | - | cheapest | Default 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. Detailed API pricing page + JSON endpoint → /models/ox-alpha/pricing Inference cost over time Data accumulates from the first daily sync - longer ranges populate over time. Prices come from OpenRouter snapshots, not a historical API.