Anthropic released Opus 5, a model that matches Fable 5's performance on many benchmarks while costing half as much, with pricing unchanged at $5/$25 per million tokens. On knowledge work benchmarks like GDPval-AA v2, Opus 5 scores 1861 compared to Fable 5's 1747, and it achieves double the pass rate of competing models on AutomationBench business workflow tasks. Opus 5 becomes the default model for Claude Max subscribers and shifts Fable 5's position as the company's tier for only the most demanding long-running autonomous projects.
Anthropic released Claude Opus 5, a new model that the company claims achieves capabilities close to Claude Fable 5 in many domains and shows significant improvements in complex coding tasks. Opus 5 arrives weeks after government scrutiny of Fable 5 led to a temporary takedown and the implementation of stronger cybersecurity measures. The release represents Anthropic's effort to provide a capable alternative following regulatory concerns about its most advanced model.
Kimi K3, an open-weight coding model from Moonshot AI, nearly matches Claude Fable 5 on the DeepSWE software engineering benchmark (68.5% vs 69.9% pass@1) while costing one-third as much per task. The cost difference is substantial: $4.65 per rollout for Kimi versus $13.41 for Fable, delivering 2.8 times more solved tasks per dollar. Being open-weight, Kimi K3 allows teams to self-host or use inference providers for deployment control, making it the more economical choice for high-volume coding tasks despite Fable's superior single-attempt reliability.
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