Anthropic's Claude Opus 5 Max Tops WebDev AI Leaderboard With Record Elo Score as Open-Source Models Close the Gap
Summary
Anthropic's claude-opus-5-max claims the top spot on the WebDev AI Leaderboard with a record Elo score of 1705 across 510,000 votes, while open-source models from DeepSeek and Z.ai push into the top 10, signaling a tightening race between proprietary and open-source AI in web development.
Key Points
- Anthropic's claude-opus-5-max leads the WebDev AI Leaderboard with a top Elo score of 1705, edging out Moonshot's kimi-k3-max at 1676 and Anthropic's claude-opus-5-high at 1669 across over 510,000 votes.
- The leaderboard spans 109 models from major AI labs including Anthropic, OpenAI, Google, DeepSeek, Alibaba, and others, with pricing ranging from as low as $0.05 per million tokens to as high as $75 per million tokens.
- Open-source models like DeepSeek's deepseek-v4-flash-high and Z.ai's glm-5.2-max are competing strongly in the top 10, signaling that open-source AI is closing the gap with proprietary models in web development tasks.