Gemini 4 Argon vs Carbon: Differences, Access & Price

Quick answer (updated 7 November 2026): Gemini 4 Argon vs Carbon, in short: Gemini 4 Argon and Gemini 4 Carbon are Google’s two newest frontier AI models. Argon (announced 30 September 2026) is the one you can actually use today: it reached general availability in the Gemini API on 13 October 2026 and is offered to paid Google AI subscribers (reports differ on whether AI Pro or only Ultra gets it in the Gemini app). Carbon (announced 28 October 2026) is newer and stronger on coding, agents and finding software vulnerabilities, and reportedly makes about half as many unsupported claims as Argon — but it is restricted to selected cybersecurity defenders for now, with no public release date.

Headlines about “Google’s most powerful model” can be confusing when there are two of them within a month. Here is what each model is, who can use it, and what it means for everyday Gemini users.

Gemini 4 Argon vs Carbon at a glance

Gemini 4 Argon vs Gemini 4 Carbon at a glance

	Gemini 4 Argon	Gemini 4 Carbon
Announced	30 September 2026	28 October 2026
Who can use it now	Gemini API (generally available since 13 Oct 2026); paid Google AI subscribers in the Gemini app (plan details reported differently)	Only a subset of cybersecurity defenders in Google’s Fairwind programme
Focus	Frontier reasoning, coding, long videos and charts, cyber-defence training	Coding, agentic tasks, vulnerability finding; fewer unsupported claims
Output limit	Up to 1M tokens (up from 64K, per Google)	Not published
Context window	Reported 1,048,576 tokens (one source could not confirm this from Google)	Not published
API price	Introductory $2 / $10 per million input / output tokens until 30 Nov 2026; reported $4 / $20 after	No public API price
Benchmark claim	—	#1 on Artificial Analysis Intelligence Index v5.0 (per Google)

What is Gemini 4 Argon?

Google introduced Argon on 30 September 2026 as its most advanced model at the time. It first rolled out to trusted cyber defenders through Google’s Fairwind security programme, then reached general availability in the Gemini API on 13 October 2026 (model ID gemini-4-argon). Google highlighted:

Much longer outputs: up to 1 million output tokens, up from 64K.
Long video and chart understanding.
Training for cybersecurity defence.

Google also reportedly cancelled Gemini 3.5 Pro to focus on Gemini 4 and on Gemini 3.8 Flash for faster, cheaper use.

What is Gemini 4 Carbon?

Announced on 28 October 2026, Carbon is described by Google as its next frontier model after Argon, with:

Significant gains in coding and agentic tasks (multi-step work done by the AI on your behalf).
Better at finding software vulnerabilities.
Roughly half the unsupported claims of Argon in Google’s internal testing.
#1 on the Artificial Analysis Intelligence Index v5.0, according to Google.

Because it is strong at finding security flaws, Google is releasing it carefully: only part of the Fairwind group of cyber defenders can use it today. Some third-party sites claim API access, but most reports say there is no public Carbon endpoint yet.

Gemini 4 Argon API pricing (as reported)

Can I use Gemini 4 in India?

Developers: Gemini 4 Argon is available through the Gemini API (pay-as-you-go pricing above). We found no India-specific restriction reported.
Gemini app users: reports say Argon is available to paid Google AI subscribers, but sources disagree on whether Google AI Pro (₹1,950/month) includes it or only Google AI Ultra. Check the model picker in your Gemini app. Plan details: Gemini plans in India.
Gemini 4 Carbon: not available to the public anywhere yet.
Free users: continue to get Google’s faster models; free access to Gemini 4 has not been reported.

How to use Gemini 4 Argon (step by step)

In the Gemini app

Open gemini.google.com or the Gemini app with an eligible Google AI subscription.
Open the model picker and choose the Gemini 4 option if it is listed for your plan.
Use it for complex tasks — long documents, coding, analysis — where speed matters less than depth.

Through the API

Create an API key in Google AI Studio.
Call the model gemini-4-argon.
Watch costs: thinking tokens count as output, and introductory pricing ends on 30 November 2026 (as reported).

Gemini 4 vs GPT-6 and Claude

OpenAI’s GPT-6 family (Astra, Sol, Luna) and Anthropic’s Claude models compete at the same level. Which is “best” depends on your task and budget — see GPT-6 models explained, the Gemini 4 Argon vs GPT-6.1 Sol comparison, and the best AI chatbots of 2026.

Advantages and limitations

Advantages	Limitations
Very long outputs (Argon: up to 1M tokens)	Carbon not publicly available
Strong coding and agentic abilities	App availability by plan is unclear
Carbon: fewer unsupported claims (per Google)	API price for Argon reportedly doubles after 30 Nov 2026

Common mistakes

Believing “free Gemini 4 Carbon” offers: no public access exists; such offers are likely scams.
Using the biggest model for every task: faster models are cheaper and often good enough for simple questions.
Trusting outputs blindly: even with fewer unsupported claims, verify important facts.

Frequently Asked Questions

What is the difference between Gemini 4 Argon and Carbon?

Argon (September 2026) is generally available via the API and to paid subscribers. Carbon (October 2026) is newer and stronger on coding and agents, but restricted to selected cybersecurity defenders.

Is Gemini 4 Carbon available to the public?

No. As of 7 November 2026, Google has not announced a public release date.

How much does Gemini 4 Argon cost?

Via the API: an introductory $2 per million input tokens and $10 per million output tokens until 30 November 2026, reportedly rising to $4 and $20.

Is Gemini 4 free?

Free access to Gemini 4 has not been reported. In the Gemini app it is offered to paid Google AI subscribers.

Is Gemini 4 better than GPT-6?

Google says Carbon tops one independent index, but results vary by task. Test the models on your own work.

What happened to Gemini 3.5 Pro?

Reports say Google cancelled it to focus on Gemini 4 and Gemini 3.8 Flash.

Conclusion

For most people, Gemini 4 Argon is the model that matters right now; Carbon is a preview of what is coming. If you pay for Google AI, check your model picker. If you are choosing an AI subscription, compare plans first — see our Google Gemini guide.

How we researched this

We used Google’s official announcements (Google blog) and coverage by TechCrunch, CNBC and 9to5Google, plus API pricing trackers. Plan availability in the Gemini app and the Argon context window are reported inconsistently, so we flag them. We have not run our own benchmarks.

Gemini 4 Argon vs Carbon: Differences, Access, Pricing & Use in India