Gemini 3.8 Flash reshapes Agent Arena Pareto frontier at $0.22 per task, 44-50% cheaper
arena · x · 2026-09-03
LMArena reports Gemini 3.8 Flash (High) has landed on the Agent Arena Pareto frontier for the first time, reshaping the cost-performance landscape.
Key numbers:
- Priced at $0.75/$3.75 per MToken (input/output); median cost of $0.22 per task with +5.94% net improvement
- On par with Grok 4.5 (+6.17% at $0.39/task) and GLM 5.2 Max (+6.23% at $0.44/task), but 44-50% cheaper
- Debuted at #14 in Agent Arena, just above DeepSeek-V4-Pro (#15), a big jump from Gemini 3.7 Flash (#32, +0.84%)
- Strong user signals: +14.78% in Praise vs. Complaint, +11.12% in Confirmed Success
- Text Arena: #7 with 1494 pts, ahead of Claude Opus 5 High (#8) and Gemini 3.7 Flash (#10)
Related event: Gemini 3.8 Flash Reshapes Agent Arena's Pareto Frontier(4 posts)→
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