Claude Fable 5.2, Claude Mythos 5.2: Anthropic unveils new AI models, check features, speed, price, release date

Claude Fable 5.2 and Claude Mythos 5.2 are here after Anthropic on Monday unveiled two new AI models. The new models, Fable 5.2 and Mythos 5.2, can perform up to 30 percent faster than previous versions, particularly on complex tasks such as coding, while costing 20 percent less, the company said.

The new models, Fable 5.2 and Mythos 5.2, can perform up to 30 percent faster than previous versions, particularly on complex tasks such as coding, while costing 20 percent less, the company said. OpenAI rival looks to strengthen its position in the fast-growing AI market ahead of its planned IPO.

Fable 5.2, Mythos 5.2


Fable 5.2 has safeguards that block most cybersecurity and biology tasks, which lets Anthropic offer it to all users. Claude Fable 5.2 targets coding, reasoning and AI agent tasks, while Claude Mythos 5.2 targets approved cybersecurity and life-sciences research applications.

Mythos 5.2 has fewer of those restrictions and is available only to vetted organizations working in cybersecurity or biomedical research.

The first versions of Fable and Mythos were released under a cloud of controversy.

Both models were pulled days after their June launch, when the US Commerce Department, citing national security concerns, ordered Anthropic to bar access by foreign nationals. The controls were lifted weeks later.

The latest versions come as Anthropic is aiming to hold its initial public offering the week of November 16, when it is expected to raise up to $100 billion, which would make it the largest IPO on record.

The San Francisco-based lab's Wall Street debut is expected to fetch a valuation exceeding $1 trillion, though estimates have fallen in recent weeks from a high of $2 trillion.

Anthropic said the new models generate outputs up to 30 per cent faster than their Claude 5.1 predecessors and communicate more clearly with users.

The company said the models are priced at $8 per million input tokens and $40 per million output tokens, lower than the pricing for previous Fable and Mythos releases.

The launch follows Anthropic's rollout of Claude Haiku 5.5 in October as the AI startup broadens its product lineup ahead of a planned IPO.

Competition in the AI industry has also intensified as OpenAI, Alphabet's Google and Meta Platforms rapidly release new models focused on coding, reasoning and AI agents to attract developers and enterprise customers.