Gemini 4 Carbon in Iran

How is Gemini 4 Carbon different from Argon?

Google introduced Gemini 4 Carbon on October 28, 2026 as a stronger version of Gemini 4 Argon, and opened it to every API developer in November. Carbon is built for heavy programming, maths and science, accurate answers, and agents that keep working on one task for hours.

It costs the same as Argon but scores 59 on the Artificial Analysis Intelligence Index, against Argon's 50. Gemini 4 Carbon reads text, images, audio, video and files and takes about a million tokens into account at once.

Carbon next to its rivals

Artificial Analysis Intelligence Index; higher means the model did better on reasoning, coding and knowledge tests.

• Claude Fable 5.2
  64.6
• Gemini 4 Carbon
  59.0
• GPT-6.1 Sol
  51.8
• Gemini 4 Argon
  50.4
• Kimi K3.1 Pro
  46.5
• GLM 5.3
  44.8

Full Gemini 4 Carbon comparisons

Price, context window, capabilities and the cost of Persian text, side by side.

• Claude Fable 5.2 vs Gemini 4 Carbon
• Gemini 4 Carbon vs GPT-6.1 Sol
• Gemini 4 Carbon vs GLM 5.3
• Gemini 4 Carbon vs Kimi K3.1 Pro
• Gemini 4 Argon vs Gemini 4 Carbon

Persian text costs less on Carbon

Tokens each model spends on 100 words of one fixed Persian text (lower is better), measured by us through the Hormouz API. Price per token is separate, so the real cost of Persian text also depends on this number.

• Gemini 4 Carbon
  160
• GPT-6.1 Sol
  171
• GLM 5.3
  206
• Kimi K3.1 Pro
  248
• Claude Fable 5.2
  368

Gemini 4 Carbon pricing

Prices are per million tokens, and reasoning tokens count as output. Repeated input is cached automatically and costs 95% less. A rial top-up shows its fee and tax separately.

Three steps to Carbon's first answer

1. 1Create a Hormouz account; all it takes is a mobile number and an SMS code.
2. 2Get an API key for your app, or go straight to Studio.
3. 3Choose google/gemini-4-carbon and give it the hard task other models struggled with.

FAQ

Is Gemini 4 Carbon better than Claude Fable 5.2?

Fable 5.2 is ahead on the Artificial Analysis Intelligence Index (64.6 against 59), but Carbon costs several times less. For heavy, high-volume work Carbon cuts the bill a lot. The comparison page puts the two side by side, number by number.

How much does Gemini 4 Carbon cost?

Until November 30, 2026: $2 per million input tokens and $10 per million output tokens; from December 1: $4 and $20.

Does it work from inside Iran without a VPN?

Yes. Your request goes to Hormouz and Hormouz carries it to Google; you need neither a Google account nor a foreign card.

Does it work with OpenAI code?

Yes. Give your OpenAI SDK Hormouz's base URL and set the model to google/gemini-4-carbon. Google's own SDK and Gemini CLI do not connect.

How does Gemini 4 Carbon handle Persian text?

It is one of the most token-efficient models for Persian: 160 tokens per 100 Persian words, where Claude Fable 5.2 needs more than twice as many (368). So the same Persian text takes fewer tokens on Carbon, and each token costs less. The full table is in the Persian token cost guide.

Carbon or Argon?

Both cost the same and Carbon is stronger on the tests; choose Carbon for new work, and keep Argon if its output already serves you.