Gemini 4 goes public. Meta arrives at the frontier.

On Monday, Meta released Muse Wonder and Muse Wonder Full, its first frontier-class models. On Tuesday, Google opened Gemini 4 Argon to everyone, less than two weeks after keeping it off the public API.

What Meta shipped

Muse Wonder is available through the Meta Model API and Muse Code at $4 per million input tokens and $20 per million output tokens. Wonder Full is for Muse Code subscribers only. It is not served through the API and has no per-token price. Meta says both will power its Muse agent, with subscribers first.

The pitch is personal and professional agents. "Active Memory" carries context about you across conversations. "Active Focus" keeps working through blockers and checks in before important actions. On the Artificial Analysis Intelligence Index, Wonder Full scores 56 and Wonder 52, up from 48 for Muse Spark 1.3 six weeks ago. Knowledge is the weak spot: on Artificial Analysis's knowledge test Wonder Full scores 30 and Wonder 25, against 46 for Claude Opus 5.5 and 42 for Argon.

What Google changed

Our October 1 report covered Argon going only to cyber defenders. Now Gemini 4 Argon is on the public Gemini API and Google Cloud, in AI Studio and Antigravity, and in the Gemini app and AI Mode in Search for Ultra and Pro subscribers. It is not on the free tier.

What stayed restricted is a different model. The public version has cyber mitigations that block offensive tasks such as pentesting and exploitation. The version without them, gemini-4-argon-cyber-permissive, is allowlist-only through the Fairwind Program, which Google is now expanding to hundreds of additional partners. The restriction moved from who may use the model to what the public one will do.

Google's own numbers: external bio red-teaming unlocked less than 1% of its bio sub-tasks, shortcut attempts on coding benchmarks fell to 2%, and attack success on the Gray Swan prompt-injection benchmark fell to 0.7%.

Same tier, different bills

Argon costs $2 and $10 per million tokens through November 30, then $4 and $20. That is Wonder's price today and the price of Claude Opus 5.5, which we covered in The frontier just got cheaper. Artificial Analysis puts Argon at 53 on its index, Opus 5.5 at 58.

Its cost to run one index task: $1.99 for Argon, $4.52 for Wonder, $5.98 for Opus 5.5. Treat that as a rough guide. Argon ran at high reasoning effort, Wonder and Opus at max.

The safety paperwork

Google published its safeguards write-up and model card with the launch. Meta says Wonder has its strongest safeguards yet against chemical, biological, radiological, nuclear, and cyber misuse, while keeping frontier cyber capability available for defense. Its full safety report is "soon."

What to watch

Whether Wonder Full reaches the API. Meta's launch post says nothing about open weights, and the weights it promised earlier for Muse Spark 1.2 are still a promise; see Meta's personal superintelligence bet. And what Argon does to demand on December 1, when its price doubles.

The point

After November 30, Argon, Wonder, and Opus 5.5 all list at $4 and $20. Price will no longer separate them. Index scores and cost per task will. See Language Models.