Anthropic launches Claude Opus 5 AI model, rivals Fable 5 at half the cost amid enterprise cost concerns
Anthropic announced its latest AI model, Claude Opus 5, on July 24, 2026, describing it as its best-performing and most cost-effective offering. Opus 5 outperforms the previous Claude Fable 5 on coding and knowledge work evaluations, while costing half the price: $5 per million input tokens and $25 per million output tokens. The launch comes as enterprises demand clearer ROI from AI investments, pressuring Anthropic and rival OpenAI to offer cheaper models. Opus 5 is not state-of-the-art for risky dual-use capabilities like cybersecurity, where the earlier Mythos 5 model excels. Anthropic had briefly disabled access to Mythos 5 and Fable 5 in June due to government export controls citing national security, which were lifted after negotiations. The company continues to collaborate with government agencies on pre-deployment testing for Opus 5.
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