Gemini 3.8 Flash vs Gemini 4 Carbon

Price, context window & benchmark comparison

Gemini 3.8 Flash

Google

$0.82 / $4.13

Input / Output · per 1M tokens

Gemini 4 Carbon

Google

$2.00 / $10.00

Input / Output · per 1M tokens

Compare different models

Verdict: Gemini 3.8 Flash is 2.4× cheaper than Gemini 4 Carbon on a typical 3:1 input/output mix. Gemini 4 Carbon scores higher on the Artificial Analysis Intelligence Index (60 vs 30.8).

	Gemini 3.8 Flash	Gemini 4 Carbon
Input price / 1M	$0.82	$2.00
Output price / 1M	$4.13	$10.00
Blended price (3:1)	$1.65	$4.00
Cached input / 1M	$0.0825	$0.10
Context window	1M	1M
Max output	66K	944K
Intelligence index	30.8	60
Coding index	76.3	—
Providers	7	7
Best provider uptime (30m)	100.0%	100.0%
Vision input	Yes	Yes
Reasoning	Yes	Yes
Tool calling	Yes	Yes
Released	2026-09-02	2026-11-10
Retirement	—	—

Cost calculator

Input tokens / requestOutput tokens / requestRequests / day

FAQ

Which is cheaper, Gemini 3.8 Flash or Gemini 4 Carbon?

Gemini 3.8 Flash is 2.4× cheaper than Gemini 4 Carbon on a typical 3:1 input/output mix.

Gemini 3.8 Flash vs Gemini 4 Carbon: which has a bigger context window?

Gemini 3.8 Flash: 1,048,576 tokens. Gemini 4 Carbon: 1,048,576 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: Gemini 3.8 Flash ≈ $3,713, Gemini 4 Carbon ≈ $9,000.

More comparisons