Arena.ai launches redesigned Leaderboard Overview
The new overview gathers live signals on newly added models, category performance, capability notes, and Arena news, and can show cross-arena scores for models such as GPT-6 Sol and Claude Opus 5.5.
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View all AI newsArena.ai opens Fall 2026 Academic Partnerships proposals with up to $50,000 per project
Tenure-track faculty at U.S. universities can submit Fall 2026 proposals on the scientific foundations of AI evaluation. Each project may receive up to $50,000, and the deadline is October 30, 2026.
Arena shows side-by-side outputs from Claude Opus 5.5 and GPT-6 Sol
Arena.ai says it has generated side-by-side outputs from Anthropic’s Claude Opus 5.5 and OpenAI’s GPT-6 Sol, and that scores for Claude Opus 5.5 are coming soon.
Arena.ai ranks GPT-6 Sol (Max) fourth in Code Arena WebDev
Arena.ai reports that OpenAI’s GPT-6 Sol (Max) scored 1,689 points and placed fourth in Code Arena: WebDev, at a blended price of $8 per million tokens. It is 72 points above GPT-5.6 Sol (xHigh), while Arena.ai says GPT-6 Luna’s score is still pending.
GPT-6 Sol and GPT-6 Luna can be tested in Battle Mode and Agent Mode
On Arena.ai, both models can be tried in Battle Mode and Agent Mode.
Claude Opus 5.5 is now in Arena.ai Agent Arena and Battle Mode
Arena.ai has added Claude Opus 5.5 to Agent Arena and to Battle Mode for WebDev, Text, Vision, and Document. Claude says it is the first Claude 5.5 model, performs at the level of Claude Fable 5.1 for most tasks, and costs 40% less to run than Opus 5.