DeepSeek’s Flash ties Anthropic’s Opus 5.5 in AI browsing benchmark

Anthropic official brand assets (anthropic.com)

DeepSeek’s latest AI model, Flash, has achieved a score of 75 out of 100 on the long-horizon browsing benchmark from Browser Use, equaling the performance of Anthropic’s Opus 5.5. This development marks a significant milestone for DeepSeek as it places its V4.1 Flash model in direct competition with Anthropic’s latest offering. The benchmark result suggests an intensifying competition in the AI model landscape, particularly in browser-agent tasks where both companies are vying for prominence. This tie occurs despite the current Browser Use Bench chart listing DeepSeek’s model at a slightly lower score than Opus 5.5.

Key Takeaways

• The tie between DeepSeek’s Flash model and Anthropic’s Opus 5.5 appears to suggest increased competition in the AI model market.
• Market pricing indicates a potential decrease in confidence that Anthropic will maintain the best AI model status by the end of November 2026.
• The competition underscores the growing capabilities of low-cost, open-weight AI models in performing complex browsing tasks.

What to Watch

Observers will be closely monitoring any updates to the Browser Use benchmark that reflect the tie between DeepSeek and Anthropic. Developments from both companies regarding further model enhancements or new releases could influence market perceptions. Additionally, attention will be on other industry leaders like Google and Meta to see if they release competitive models that could shift the current standings by the end of November 2026.