OpenAI Files for IPO at $852B, Claude Mythos 5 Spotted in Dev Mode, Apple Unveils Gemini Siri at WWDC
OpenAI Files for IPO at $852B, Claude Mythos 5 Spotted in Dev Mode, Apple Unveils Gemini Siri at WWDC
Three of the biggest names in AI moved on the same day. OpenAI filed to go public. A new Claude Mythos model surfaced in developer tooling. And Apple, at Tim Cook's final WWDC keynote as CEO, finally shipped the rebuilt Gemini-powered Siri it has been promising for two years.
OpenAI Files for IPO at $852 Billion
OpenAI confidentially submitted a draft S-1 to the SEC at an $852 billion valuation, based on a funding round closed earlier this year. Goldman Sachs and Morgan Stanley are leading the filing process ahead of a potential fall listing. A tender offer is in the works that would let employees cash out shares.
The timing is significant. Anthropic filed its own confidential prospectus exactly one week ago at a $965 billion valuation. SpaceX has already started its investor roadshow, planning to sell shares at $135 apiece for a $75 billion raise and a valuation around $1.77 trillion — which would be the largest IPO in history. Bankers have told both OpenAI and Anthropic that an early-mover advantage is at stake: whoever lists first sets the terms for how investors categorize the entire AI sector.
OpenAI is hedging on commitment. The company stated it has not locked a timeline because there are things it wants to do that are easier as a private company, adding that the filing simply gives it the option to go public sooner if that ends up being the best path. Sam Altman framed it as a third phase for the company.
| Company | Valuation | Filing Status | Lead Banks |
|---|---|---|---|
| SpaceX | ~$1.77 trillion | Roadshow active | Multiple |
| Anthropic | ~$965 billion | Confidential S-1 filed June 1 | Multiple |
| OpenAI | ~$852 billion | Confidential S-1 filed June 8 | Goldman Sachs, Morgan Stanley |
Claude Mythos 5 Spotted in Dev Mode
A new model slug — "Claude Mythos 5" — surfaced in Anthropic's Dev Mode, caught by the leak-tracking community. The signal suggests Mythos is being set up as its own distinct model class, sitting alongside the Haiku, Sonnet, and Opus families rather than remaining a one-off preview.
This is a sighting, not an announcement. A model identifier appearing in developer tooling means something is being prepared, but Anthropic has confirmed no Mythos 5 specifications, release date, or capabilities. What it aligns with is the timeline Anthropic gave at the Opus 4.8 launch: that Mythos-class models would reach all customers in the coming weeks. A dedicated Mythos tier showing up in Dev Mode is consistent with that promise becoming real.
If the slug holds up, the most powerful model class Anthropic has built is about to become a permanent product line instead of a gated preview.
Apple Unveils Gemini Siri at Tim Cook's Final WWDC
At Tim Cook's final keynote as CEO, Apple delivered the Siri overhaul it has owed users since 2024. The new Siri lives across all of Apple's platforms, performs complex actions, knows what you are looking at on screen, and automates tasks across different applications. It is the biggest update to the assistant since Siri launched over a decade ago.
How It Works
The rebuilt Siri runs on a custom 1.2-trillion-parameter Gemini model that Apple licenses from Google for roughly $1 billion per year.
New Capabilities
- On-screen and personal context awareness: Siri understands what you are viewing and can take action based on screen content
- Write with Siri: Draft text anywhere across the OS
- Expanded Visual Intelligence: Enhanced camera-based object recognition and bill splitting
- Multi-command support: Stack several requests into a single prompt
- Siri mode in Camera app: Real-time object recognition
- AI Photos tools: Clean Up, Extend, Reframe, and Spatial Reframing
The broader Apple Intelligence platform was rebuilt around a new architecture co-developed with Google.
Limitations
- Availability: Launches as a beta later in 2026, initially English only
- EU: Siri AI will not be available on iPhone or iPad in the EU when iOS 27 launches, which Apple links to Digital Markets Act requirements
- China: Will not launch initially due to regulatory requirements
- Developer dependency: Apple deprecated SiriKit in favor of App Intents, meaning cross-app Siri depends on developers migrating before iOS 27 reaches a billion devices this fall
The Context
Tim Cook closed his final keynote stating he truly believes the best is still ahead, before handing the company to John Ternus on September 1. He spent his last keynote fixing the one product that most threatened his legacy — by renting the brain from Google.
The Pattern
Three moves in one day illustrate a maturing industry where every layer is advancing simultaneously:
- Money: OpenAI, Anthropic, and SpaceX racing to public markets, converting the private AI boom into public-market reality
- Models: Anthropic about to turn its most powerful model class into a permanent product line, even while preparing for its IPO
- Distribution: Frontier AI reaching a billion devices through Apple's most mainstream product, powered by a licensed Google model
The valuations are being set, the capabilities are still climbing, and the technology is reaching everyone's pocket — all in one news cycle.