Arena Weekly: Gemini 4 Argon Tops Text Arena, Sonnet 5.5 Within 2 Points of GPT-6 at 80% Less Cost
arena · x · 2026-10-03
LMArena's weekly update shows four releases reshaping the Pareto frontier across Text, Code, and Agent Arena:
- GPT-6.1 Sol (Max) debuted at #3 in Code Arena: WebDev post-OpenAI DevDay and joined the Pareto frontier at $8/MToken;
- Later that day Sonnet 5.5 pushed Sol to #4 and off the frontier. Sonnet now trails #2 GPT-6 Astra (Max) by just 2 points at 80% lower cost;
- Gemini 4 Argon (High) landed #1 in Text Arena, #8 in Code Arena: WebDev (1679 pts), and #8 in Agent Arena (+7.92% net improvement);
- Open-source MiMo-V2.6-Pro and Flash entered Agent Arena at #5 and #9 among open models.
Agent scores for GPT-6.1 Sol and Sonnet 5.5 are coming soon.
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