ThursdAI — the weekly AI news podcast hosted by Alex Volkov — has covered 3 OpenRouter releases since Jul 2025, most recently Union Alpha on Sep 17, 2026. Highlights include Union Alpha, Cypher Alpha, Fusion API. Every entry below has primary-source links and the episode segment where we covered it live, plus key numbers where we have them.
Union Alpha: anonymous stealth model free on OpenRouter with 262K context
A new anonymous stealth model called Union Alpha appeared for free on OpenRouter with a 262K context window, processing over 100B tokens within hours of listing. The community's leading guess for the lab behind it is Z.ai, but the provider remains unconfirmed.
OpenRouter launches Fusion API, a panel of budget models competing with frontier models
OpenRouter launched Fusion API, which routes or ensembles a panel of lower-cost models to reach near-frontier results. The episode notes framed it as beating GPT-5.5 and Opus 4.8 in some comparisons while landing within roughly 1% of Claude Fable 5 at half the price.
Mystery 1M-context model 'Cypher Alpha' appears free on OpenRouter
A stealth model called Cypher Alpha showed up on OpenRouter with a free 1M-token context window, with the panel speculating it could be Amazon Titan. Alex used it as an example of how model releases increasingly arrive as anonymous market probes rather than tidy launches.
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