Antropic Claude Code

Model

Anthropic just released Claude Fable 5, opening its top Mythos tier to the public for the first time — with a new set of guardrails compared to the original Mythos Preview and performance that is state-of-the-art on nearly all AI benchmarks.

The details: April's initial Mythos Preview was only available to 150+ vetted partners via Project Glasswing, surfacing serious flaws across major OS and browsers.

Fable is a more restricted version of Mythos, with queries on topics like cybersecurity, biology, and chemistry routed to Opus 4.8 instead.

Fable hits new highs across major benchmarks, showing massive gains over Opus 4.8 and GPT 5.5 on coding, reasoning, knowledge work, and more.

Mythos 5 releases to Anthropic’s Project Glasswing partners, providing less restrictive use on cybersecurity at lower costs than Mythos Preview.

Fable is available in all Claude subscription tiers until June 22, then it will flip to separate usage credits priced at $10 / M input and $50 / M output tokens.

Why it matters: Every lab calls its latest release "the best model in the world"… What's rare is the rest of the AI world actually seeming to agree. Fable/Mythos lived up to the hype on benchmarks, but the question now turns to broader cost and access, with lots of content restrictions and June 22 looming as the cutoff before the credit pain kicks in. Anthropic's financial services plugin marketplace to Claude Code, install market research skills, and use them to create market research reports, equity analysis, earnings reviews, and Excel sheets.

Financial Analist Add in

Step-by-step: Open a terminal and start Claude Code. Once it’s running, type: /marketplace and hit enter on the plugin marketplace option to open the plugin manager

Go to the Marketplaces tab in the plugin manager, select Add Marketplace, and paste this GitHub link to add the new claude-for-financial-services marketplace

Open the new marketplace and browse plugins. For us, market-researcher, earnings-reviewer, equity-research, and financial-analysis did well

Install the skills you want, then use them inside Claude Code to create sourced reports, compare companies, review earnings, or financial analysis outputs

Pro tip: Treat this as research support, not financial advice. Use public information, ask Claude to cite sources, and verify anything important before making decisions.