Google opened Gemini 4 Argon on Tuesday to developers, enterprises and paying subscribers. It's available today in the paid tier of the Gemini API, and it's starting to roll out in the Gemini app and in AI Mode in Google Search on the Google AI Pro and Ultra plans. This is the second phase of a staged launch: Google unveiled Argon on September 30, but at the time it only gave it to cybersecurity defenders in its Fairwind Program and promised a wider release "soon," with no date.
According to Reuters, Google is trying to regain ground against OpenAI and Anthropic after months of delays: in September it went as far as announcing it would no longer release Gemini 3.5 Pro.
What Argon brings
Google pitches it as its new frontier model and aims it at long, multistep work: software engineering, knowledge work in finance and law, cybersecurity and science. According to today's announcement, it gives more direct answers with less hedging, follows style instructions better, and improves at spatial reasoning, mathematical precision and visual coding.
All of these numbers come from Google, and there's no independent testing yet. The first three are from today's announcement:
- Vals Index: first place on this index from Vals, which scores finance, coding, legal and tax tasks. Google doesn't give the score.
- ERQA: 87% on this test of physical and spatial problems in 3D environments, which Google lists under robotics.
- Gray Swan: a 0.7% success rate, across 15 adaptive attempts, for indirect prompt injection attacks, where text hidden in a web page or document tries to give the model orders.
- DeepSWE v1.1 and AutomationBench: 77.9% on the first, which measures long real-world software engineering tasks, and 51.3% on the second, Zapier's test of end-to-end business processes. These two come from the September 30 announcement.
On safety, Google says it trained Argon to stop and ask a person for confirmation before taking irreversible steps, and that an automated monitor watches its reasoning and actions in real time when it works as an agent, to block unintended workarounds. Google has also started expanding Fairwind to hundreds more partners; members can get a version without the cybersecurity guardrails. And it opened applications for 10,000 scientists to get six months of free access to the highest usage tier of Google Antigravity, its agent-first development platform.
If you pay for Google AI Pro in Mexico
Google's already lists access to Gemini 4 Argon for Google AI Pro, at 395 pesos a month, and for Google AI Ultra, from 1,999 pesos a month (a 3,949-peso tier has usage limits 20 times higher than Pro). The free plan and the 99-peso Google AI Plus don't include it. According to the , Argon is rolling out globally to Pro and Ultra, with no country list; since it's gradual, it may take a while to show up on your account.
