Anthropic Reintroduces Fable 5 in Paid Plans, Unveils Cheaper Opus 5 Model

Anthropic has announced the reintroduction of its most advanced AI model, Fable 5, in its paid Max and Team Premium plans starting July 20, according to the company. The move comes alongside the release of a new, more cost-efficient model, Claude Opus 5, which the company says approaches Fable 5's performance at half the price.

Coverage Comparison

Reports from Dawn detail two distinct but related developments from the San Francisco-based AI company. One article focuses on the reintroduction of Fable 5 to specific subscription tiers after a period of limited access and removal from public availability. Another article covers the release of Claude Opus 5, a new model that Anthropic claims tops industry benchmarks for coding and knowledge work while consuming fewer computing resources than earlier versions.

Key Claims

  • Reintroduction of Fable 5: Anthropic said on Saturday that it will reintroduce Fable 5 in the paid Max and Team Premium plans from July 20. The model had been briefly pulled from public access in June due to US Commerce Department export controls, as reported by the company. After its redeployment, Fable 5 was included in the Pro, Max, Team, and select Enterprise plans from July 1 to 7 for up to 50% of weekly usage limits, after which it was available via usage credits. In a post on Saturday, Claude stated, "Beginning July 20, Claude Fable 5 will be included in all Max and Team Premium plans, at 50 per cent of limits." Pro and Team Standard users will continue to have access to Fable via usage credits, though they will receive a one-time $100 credit.
  • Opus 5 release and pricing: Anthropic released Claude Opus 5 on Friday, which the company says approaches the performance of Fable 5 at half the price. The cost of Opus 5 is $5 per million input tokens and $25 per million output tokens, half the price of Fable 5, Anthropic's most expensive publicly available offering. The company said the new model performs close to Fable 5 across many tasks despite the lower cost.
  • Benchmark performance: Anthropic stated that Opus 5 tops industry benchmarks for coding and knowledge work while consuming fewer computing resources than earlier versions. The claim addresses the rising concerns of business customers who have baulked at the expense of running advanced AI systems.
  • Safety and capabilities: On cybersecurity, Anthropic said it deliberately avoided training Opus 5 on cyber tasks, and that the model remains behind Mythos 5 — its most capable and most tightly restricted system, available only to select partners — on both offensive cyber work and biological research capabilities that could be misused. The company said Opus 5 finds software flaws about as well as Mythos 5 but lags far behind in turning those flaws into something that could be weaponised into an attack.
  • Fable 5 details: Fable 5, a public version of the Mythos AI model, was rolled out in early June, with Anthropic describing it as its most powerful model ever made for wider use. The company had said, "It is state-of-the-art on nearly all tested benchmarks of AI capability, showing exceptional performance in software engineering, knowledge work, vision, scientific research, and many other areas. The longer and more complex the task, the larger Fable 5's lead over our other models."
  • User plans and access: Anthropic offers various user plans, including Free, Pro, Max 5x, and Team Premium. Usage credits allow individuals subscribed to paid Claude plans (Pro, Max 5x, and Max 20x) to continue using Claude after reaching their included usage limits. The company acknowledged that demand for Fable has been challenging to predict, which is why it rolled out the model to subscription plans in stages, extending access several times as it secured additional capacity.
  • Market context: Cost has become a major issue after Anthropic and its archrival OpenAI, the maker of ChatGPT, both filed for stock market listings in June. Wall Street is scrutinising their business performance more closely than ever ahead of their market debuts.