Which lab will release the next frontier model after Anthropic's Fable 5?

Anthropic's Fable 5 set a new frontier-model bar. This market asks which lab ships the next model that surpasses it on a widely-cited public benchmark or leaderboard (e.g. LMArena, MMLU-Pro, SWE-bench).

Resolution Criteria

Resolves to the lab whose model is first to be independently reported as surpassing Fable 5 on a major public benchmark/leaderboard, per coverage from 2+ reputable outlets or the leaderboard itself. Resolves "Other" if it is a lab not listed.