Hidden "Obsidian 3" model tops FrontierCode 2.0 at 46.8%, edging Opus 5.5; claude-code harness hints at Claude origin - 𝕏/@chetaslua

First reported Oct 28, 2026, 09:29 UTC

Source reports

Hidden "Obsidian 3" model tops FrontierCode 2.0 at 46.8%, edging Opus 5.5; claude-code harness hints at Claude origin - 𝕏/@chetaslua 🔗 Discord · Leviathan · Source 🗺️ Cohere · Claude · AI Agents 🕵️ @w00tcake — Закрепи.sender, Oct 28, 2026, 09:29 UTC
Hidden "Obsidian 3" model tops FrontierCode 2.0 at 46.8%, edging Opus 5.5; claude-code harness hints at Claude origin - 𝕏/@chetaslua 🔗 Discord · Leviathan · Source 🗺️ Cohere · Claude · AI Agents 🕵️ @w00tcake — Rickler Feed, Oct 28, 2026, 09:29 UTC
Very likely Fable 5.5 found in FrontierCode 2.0: Cognitions data reveals a hidden model, "Obsidian 3," scoring 46.8% against #1 Opus 5.5’s 45.5%, and since it runs in the claude-code harness used exclusively by Claude models, its save to say its Fable 5.5… — @kimmonismus (X), Oct 28, 2026, 12:54 UTC

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