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All comparisons · Prices checked 2026-10-01
GPT-6 Astra vs Gemini 4 Argon: API cost comparison
For a typical chatbot reply, GPT-6 Astra costs $0.035 and Gemini 4 Argon costs $0.013 per request: Gemini 4 Argon is 2.6× cheaper. Gemini 4 Argon is cheaper in every workload below.
API prices
| GPT-6 Astra | Gemini 4 Argon | |
|---|---|---|
| Maker | OpenAI | |
| Input / 1M tokens | $10 | $4 |
| Output / 1M tokens | $50 | $20 |
| Output vs input price | 5.0× | 5.0× |
| Context window | 922K tokens | 1M tokens |
| Tokens for the same English text | baseline (GPT o200k count) | ~95% of GPT's count (estimate) |
Cost by workload
| Workload (per 1,000 requests) | GPT-6 Astra | Gemini 4 Argon | Cheaper |
|---|---|---|---|
| Chatbot reply short question plus some chat history · 1,500 in / 400 out | $35.00 | $13.30 | Gemini 4 Argon 2.6× cheaper |
| Document Q&A (RAG) retrieved passages plus a question · 8,000 in / 500 out | $105 | $39.90 | Gemini 4 Argon 2.6× cheaper |
| Coding agent step large working context, short edit · 25,000 in / 800 out | $290 | $110 | Gemini 4 Argon 2.6× cheaper |
| Summarize a long report long input, short summary · 20,000 in / 300 out | $215 | $81.70 | Gemini 4 Argon 2.6× cheaper |
| Write an article short brief, long draft · 800 in / 2,000 out | $108 | $41.04 | Gemini 4 Argon 2.6× cheaper |
Gemini 4 Argon is cheaper on both input and output, so it costs less for every kind of request. The gap is 2.6× on input and 2.6× on output once the tokenizer difference is included.
Same text, different token counts. Each company uses its own tokenizer. By our estimate GPT-6 Astra counts about 5% more tokens than Gemini 4 Argon for the same English text, and the costs above already include that. Paste your own prompt into the token counter to see both counts.
Monthly cost
| Monthly volume | GPT-6 Astra | Gemini 4 Argon |
|---|---|---|
| 10,000 chatbot replies / month | $350 | $133 |
| 100,000 chatbot replies / month | $3,500 | $1,330 |
| 1,000,000 chatbot replies / month | $35,000 | $13,300 |
Calculate your own
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Token counts are for English text measured with GPT's tokenizer; each model's own tokenizer difference is applied automatically.
Questions
Which is cheaper, GPT-6 Astra or Gemini 4 Argon?
For a typical chatbot reply (1,500 input and 400 output tokens), GPT-6 Astra costs $0.035 and Gemini 4 Argon costs $0.013 per request, so Gemini 4 Argon is 2.6× cheaper. Gemini 4 Argon is cheaper in every workload below.
How much do GPT-6 Astra and Gemini 4 Argon cost per million tokens?
GPT-6 Astra costs $10 per 1M input tokens and $50 per 1M output tokens. Gemini 4 Argon costs $4 input and $20 output. Prices checked 2026-10-01.
Do both models count the same text as the same number of tokens?
No. Each model family has its own tokenizer, so the same text can be a different number of tokens. The costs on this page already include that difference (estimated from GPT's tokenizer).
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Open the token counter →Standard API list prices, short-context tier, no caching or batch discounts. Prices change; check each provider's pricing page before large jobs.