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Leak spotted ·

Obsidian 3

by Anthropic (likely) found in cognition.com

Leak
Status
Leaked, not yet released
Maker
Anthropic (likely)
Found in
cognition.com cognition.com
Detected
Posted to X
0 s after detection
Model ID
Obsidian 3also listed as obsidian-3
AI Tracker@aitrackerbot ·

We spotted Obsidian 3 eleven days ago 🪨 It was one of four unannounced codenames we found in Devin's Next build on Oct 17. Now it has surfaced in Cognition's FrontierCode 2.0 data, before being pulled: - 46.8% at high effort, about $8.62 per task - Claude Opus 5.5, #1 on the public board, scores 45.5% - It reportedly ran in the claude-code harness, which only Claude models use there That points to an unreleased Anthropic model.

Timeline

1 sighting
  1. leak

    Spotted in cognition.com

    We spotted Obsidian 3 eleven days ago 🪨

    Post on X