Gemini 3.5 Flash vs GPT-6 Sol Pro

Price, context window & benchmark comparison

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Gemini 3.5 Flash

Google
$1.50 / $9.00
Input / Output · per 1M tokens
VS
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GPT-6 Sol Pro

OpenAI
$2.00 / $10.00
Input / Output · per 1M tokens
Compare different models
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Verdict: Gemini 3.5 Flash is 16% cheaper than GPT-6 Sol Pro on a typical 3:1 input/output mix. GPT-6 Sol Pro has the larger context window (1.1M vs 1M).
Gemini 3.5 FlashGPT-6 Sol Pro
Input price / 1M$1.50$2.00
Output price / 1M$9.00$10.00
Blended price (3:1)$3.38$4.00
Cached input / 1M$0.15$0.20
Context window1M1.1M
Max output66K128K
Intelligence index32.6—
Coding index70.1—
Providers—6
Best provider uptime (30m)—99.9%
Vision inputYesYes
ReasoningYesYes
Tool callingYesYes
Released2026-05-192026-09-22
Retirement——

Cost calculator

FAQ

Which is cheaper, Gemini 3.5 Flash or GPT-6 Sol Pro?

Gemini 3.5 Flash is 16% cheaper than GPT-6 Sol Pro on a typical 3:1 input/output mix.

Gemini 3.5 Flash vs GPT-6 Sol Pro: which has a bigger context window?

Gemini 3.5 Flash: 1,048,576 tokens. GPT-6 Sol Pro: 1,050,000 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: Gemini 3.5 Flash ≈ $7,500, GPT-6 Sol Pro ≈ $9,000.

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