Claude Opus 5 5

Anthropic Claude Opus 5.5 breaks GPT-6 benchmark during evaluation: Anthropic's Claude Opus 5.5 was benchmarked against OpenAI's GPT-6 Sol. During the evaluation, Opus 5.5 continuously built, judged, fixed, and iterated on tasks until the benchmark itself broke down.

LLMs & Model Evaluation • The Neuron

Anthropic went CRAZY (Opus 5.5): The video features a series of performance tests evaluating Anthropic's Claude 3.5 Opus artificial intelligence model. Guest Thariq joins to analyze the model's capabilities and benchmark results. The discussion highlights how the model compares to previous iterations and competitor offerings.

Technology • Matthew Berman

SAFE benchmark tests if frontier AI models seek safety evidence: Researchers introduced SAFE, a benchmark evaluating whether frontier models choose to acquire safety-relevant evidence before making deployment decisions. Testing on GPT-5.5, o3, Claude Opus 4.8, and Claude Sonnet 4.6 revealed distinct evidence-acquisition policies among the models.

AI safety • arXiv