Gemini 3.8 Flash vs GPT-5.5

Price, context window & benchmark comparison

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Gemini 3.8 Flash

Google
$0.75 / $3.75
Input / Output · per 1M tokens
VS
O

GPT-5.5

OpenAI
$5.00 / $30.00
Input / Output · per 1M tokens
Compare different models
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Verdict: Gemini 3.8 Flash is 7.5× cheaper than GPT-5.5 on a typical 3:1 input/output mix. Gemini 3.8 Flash scores higher on the Artificial Analysis Intelligence Index (40.9 vs 38.4). GPT-5.5 has the larger context window (1.1M vs 1M).
Gemini 3.8 FlashGPT-5.5
Input price / 1M$0.75$5.00
Output price / 1M$3.75$30.00
Blended price (3:1)$1.50$11.25
Cached input / 1M$0.075$0.50
Context window1M1.1M
Max output66K128K
Intelligence index40.938.4
Coding index76.374.9
Providers6
Best provider uptime (30m)100.0%
Vision inputYesYes
ReasoningYesYes
Tool callingYesYes
Released2026-09-022026-04-24
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FAQ

Which is cheaper, Gemini 3.8 Flash or GPT-5.5?

Gemini 3.8 Flash is 7.5× cheaper than GPT-5.5 on a typical 3:1 input/output mix.

Gemini 3.8 Flash vs GPT-5.5: which has a bigger context window?

Gemini 3.8 Flash: 1,048,576 tokens. GPT-5.5: 1,050,000 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: Gemini 3.8 Flash ≈ $3,375, GPT-5.5 ≈ $25,000.

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