Three tectonic events hit the AI industry this week — any one of them would have dominated the news cycle on its own. Anthropic released Claude Fable 5 yesterday, the first Mythos-tier model available to the general public. Apple presented a complete Siri rebuild at WWDC on Monday. And OpenAI, alongside Anthropic itself, filed confidential IPO paperwork with the SEC. The industry has not moved this fast since the chatbot era began.

Claude Fable 5: Mythos goes public

Anthropic launched Claude Fable 5 on June 9 — the safety-hardened version of Mythos 5, previously restricted to trusted partners under Project Glasswing. Fable 5 carries a 1 million-token context window, up to 128,000 output tokens, and delivers state-of-the-art performance across software engineering, knowledge work, vision, scientific research, and especially long-horizon, multi-step agentic tasks.

API pricing is $10 per million input tokens and $50 per million output tokens, with prompt caching discounts available. Through June 22, the model is bundled into Pro, Max, Team, and Enterprise plans (counted at 2x usage), after which it switches to usage-based credits.

Apple's Siri AI: a full rewrite

At WWDC 2026 on Monday, Apple unveiled Siri AI — not an incremental update, but a complete architectural rebuild. The new assistant understands personal context (messages, emails, photos), has onscreen awareness, executes cross-app actions, and maintains conversational memory across long interactions.

Siri AI blends Apple Foundation Models with Google Gemini under the hood. Apple also introduced a dedicated Siri app with conversation history synced via iCloud. A beta is expected later this year, initially English-only. Regulatory hurdles in the EU and China may delay the full rollout.

The IPO wave: OpenAI and Anthropic file

On Monday, OpenAI confidentially filed with the SEC for an IPO that could become one of the largest tech listings in history. Nearly simultaneously, Anthropic submitted its own confidential S-1, with reports citing a $47 billion annualized revenue run rate and a valuation near $965 billion.

Alphabet, meanwhile, raised $80 billion in stock to fund AI compute infrastructure. The picture is clear: frontier AI labs are transitioning from venture capital to public markets, in a race to secure the massive compute resources needed for the next generation of models.

Google: 3.5 Flash live, 3.5 Pro incoming

Google released Gemini 3.5 Flash at I/O in May — a model built for "frontier intelligence with action," excelling at complex agentic workflows, coding, and multimodal understanding. Gemini 3.5 Pro remains in internal preview but is expected publicly this month. On June 3, Google also released Gemma 4 12B, a compact multimodal model under Apache 2.0 license, optimized for on-device use.

The infrastructure race

NVIDIA signed a multiyear partnership with SK hynix for next-generation AI memory targeting Vera Rubin supercomputer-class infrastructure. Meta unveiled new generations of its custom MTIA AI chips. Alphabet committed $80 billion. The infrastructure buildout continues at an unprecedented pace, even as concerns mount over energy consumption and water usage by data centers.

The bottom line

This week marks a triple inflection point: the most powerful models become publicly accessible (Claude Fable 5), consumer AI gets a genuine identity reset (Siri AI), and the leading labs go public. The industry is shifting from experimentation to scaled infrastructure, with a clear price tag attached.