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Anthropic announces Claude Opus 5
Anthropic announced Claude Opus 5, describing it as approaching Claude Fable 5's frontier intelligence at half the price.
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Meta releases Muse Spark 1.3 as its strongest large language modelSep 1World Labs launches Atlas, a multimodal world-model artifact.Sep 2Abliteration.ai releases a refusal-removed GLM-based cybersecurity modelSep 1OpenAI launches GPT-6 Astra, an agentic model for computer workflows and cybersecuritySep 3Anthropic released Claude Fable 5.1 broadly and Claude Mythos 5.1 to vetted organizations.Sep 1