API price comparison · Updated
Gemini 4 Argon costs $2.00 per million input tokens and $10.00 per million output tokens; Gemini 3.8 Flash costs $0.75 and $3.75. For an agent task (80,000 input tokens, 60,000 of them cached, and 6,000 output), Gemini 4 Argon costs $0.106 and Gemini 3.8 Flash $0.042: Gemini 4 Argon costs 2.5× as much. Gemini 4 Argon's price changes on Dec 1, 2026 to $4.00 input and $20.00 output per million tokens. Gemini 3.8 Flash's price changes on Jan 1, 2027 to $1.50 input and $7.50 output per million tokens.
Gemini 3.8 Flash costs 63% less for this workload. Excludes cache writes, tools and taxes.
| Price | Gemini 4 Argon | Gemini 3.8 Flash |
|---|---|---|
| Model ID | gemini-4-argon | gemini-3.8-flash |
| Input | $2.00 | $0.75 |
| Cache read | $0.10 | $0.075 |
| Cache write | Storage billed per hour | Storage billed per hour |
| Output | $10.00 | $3.75 |
| Batch in / out | $1.00 / $5.00 | $0.375 / $1.875 |
| Long prompts | Same rate | Same rate |
| Scheduled change | From Dec 1, 2026: $4.00 / $20.00 | From Jan 1, 2027: $1.50 / $7.50 |
| Status | Paid tier only | Available |
Prices for each provider’s own API, from Google Gemini’s pricing page. The lower price in each row is highlighted. Ganivra uses these same rates to price Gemini 4 Argon and Gemini 3.8 Flash calls.
Worked out from the prices above at standard rates, with no Batch discount. Long-prompt rates apply where a model has them.
| Request | Gemini 4 Argon | Gemini 3.8 Flash | Per 1,000 requests | Difference |
|---|---|---|---|---|
| Chat reply3,000 input tokens, 500 output | $0.011 | $0.0041 | $11.00 / $4.13 | Gemini 4 Argon costs 2.7× as much |
| Document summary30,000 input tokens, 1,500 output | $0.075 | $0.028 | $75.00 / $28.13 | Gemini 4 Argon costs 2.7× as much |
| Agent task80,000 input tokens (60,000 cached), 6,000 output | $0.106 | $0.042 | $106 / $42.00 | Gemini 4 Argon costs 2.5× as much |
| Long document300,000 input tokens, 2,000 output | $0.620 | $0.233 | $620 / $233 | Gemini 4 Argon costs 2.7× as much |
Ganivra prices every Gemini 4 Argon and Gemini 3.8 Flash call you make and adds it up by customer, feature and workflow, next to what each customer pays. Switch a workflow and see what it did to each customer’s margin.
Per million tokens, Gemini 4 Argon costs $2.00 input and $10.00 output, and Gemini 3.8 Flash $0.75 input and $3.75 output. For an agent task (80,000 input tokens, 60,000 of them cached, and 6,000 output), Gemini 4 Argon costs 2.5× as much: $106 against $42.00 per 1,000 tasks.
$2.00 input and $10.00 output per million tokens on Google Gemini's API, with cached input at $0.10 and Batch at $1.00 input and $5.00 output. The rate is the same at any prompt length.
$0.75 input and $3.75 output per million tokens on Google Gemini's API, with cached input at $0.075 and Batch at $0.375 input and $1.875 output. The rate is the same at any prompt length.
For a 300,000 input tokens, 2,000 output request, Gemini 4 Argon costs $0.620 and Gemini 3.8 Flash $0.233: Gemini 4 Argon costs 2.7× as much. On Gemini 4 Argon, one rate at any prompt length; on Gemini 3.8 Flash, one rate at any prompt length.
Yes. On Dec 1, 2026, Gemini 4 Argon goes from $2.00 input and $10.00 output to $4.00 input and $20.00 output per million tokens. After the change, the agent task costs $0.212 on Gemini 4 Argon against $0.042 on Gemini 3.8 Flash.
Yes. On Jan 1, 2027, Gemini 3.8 Flash goes from $0.75 input and $3.75 output to $1.50 input and $7.50 output per million tokens. After the change, the agent task costs $0.084 on Gemini 3.8 Flash against $0.106 on Gemini 4 Argon.
Record what each call actually used, then price the same usage on both models. Ganivra does this from your recorded calls: it shows what each customer, feature and workflow would cost on Gemini 4 Argon and on Gemini 3.8 Flash, next to what each customer pays you.
Every model on one page: Gemini 4 Argon pricing · Gemini 3.8 Flash pricing · all model price comparisons · all supported models.