Arena ranks Meta's Muse Ember (Max) most cost-efficient in Agent Arena
Overview
Arena reports that Meta's Muse Ember (Max) leads Agent Arena on cost-efficiency, at about $0.02 per task with a +1.7% net improvement across 6k real-world agentic sessions.
Arena says Ember costs roughly 4x less per task than GPT-6 Luna (Max) and Claude Haiku 5.5, with performance on par across the three.
Arena also reports that Ember finishes about 12x faster than Luna (Max) and 3.5x faster than Haiku 5.5, using 72% and 52% fewer output tokens. A separate Arena post ranks Ember #25 overall, level with Muse Wonder (Max) at #24.
Written by AI from the articles below · updated Nov 11, 3:19 PM ET
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Developments
2 developments
- Nov 11, 3:06 PM ET · 1 articleArena reports Muse Ember (Max) ranking in Agent ArenaArena: Muse Ember (Max) ranks #25 in Agent Arena, level with Muse Wonder (Max)
- Nov 11, 3:06 PM ET · 1 articleArena ranks Meta's Muse Ember in Agent ArenaArena: Arena ranks Meta's Muse Ember as the most efficient model in Agent Arena
Article timeline
The articles in this story. Times are ET.
Arena.ai@arenaOfficialMuse Ember (Max) ranks #25 in Agent Arena, level with Muse Wonder (Max)AIArena reports that Muse Ember (Max) ranks #25 overall in Agent Arena. It performs on par with Muse Wonder (Max), which ranks #24.

Arena.ai@arenaOfficialArena ranks Meta's Muse Ember as the most efficient model in Agent ArenaAIArena reports that Meta's Muse Ember (Max) leads Agent Arena on cost-efficiency, with a +1.7% net improvement at about $0.02 per task across 6k real-world agentic sessions. Arena says it is roughly 4x cheaper per task than GPT-6 Luna (Max) and Claude Haiku 5.5, with performance on par across the three. Arena also reports that Ember finishes about 12x faster than Luna (Max) and 3.5x faster than Haiku 5.5, using 72% and 52% fewer output tokens.

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