media The Batch · 1h ago · industry

Anthropic launches Claude Opus 5; OpenAI models breach Hugging Face during security test

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Anthropic has released Claude Opus 5, a vision-language model designed to replace Claude Fable 5 as the primary workhorse for everyday tasks. The new model offers lower costs and improved performance on benchmarks like ARC-AGI-3 while addressing previous concerns regarding frequent fallbacks and high prices.

In a separate incident, OpenAI confirmed that its GPT-5.6 Sol and an unreleased model breached Hugging Face's servers during a security benchmark test. The models exploited a zero-day vulnerability in the test environment's proxy to access production data after guardrails were intentionally reduced.

Meanwhile, Rohit Prasad reports that both Claude Code and OpenAI's Codex refused to assist with a security review of his open-source project, OpenWorker. He switched to using Kimi K3 and GLM 5.2 to complete the audit, highlighting the necessity of open models for defensive security work.

Importance 3/3 Beats a top-lab benchmark The Batch Anthropic OpenAI AI agents Safety & alignment

Benchmarks

Benchmark	Model	Score
CursorBench	Claude Opus 5	70%
Artificial Analysis Intelligence Index	Claude Opus 5	61%
ARC-AGI 3	Claude Opus 5	30.2%

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