Gemini 3.6 Flash vs GPT-5.2
Google against OpenAI, costed on the same three workloads. Gemini 3.6 Flash is cheaper on all three workloads.
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Monthly bill, side by side
| Workload | Gemini 3.6 Flash | GPT-5.2 | Difference |
|---|---|---|---|
| Support chatbot 2,500 six-turn conversations a day |
$3,021 | $9,174 | $6,154 (3×) |
| Document summarizer 1,000 single-shot summaries a day |
$364 | $977 | $612 (2.7×) |
| Coding agent 200 twelve-turn sessions a day |
$2,106 | $5,859 | $3,753 (2.8×) |
No prompt caching and no batch discount on either side, so the comparison is like for like. Both figures assume 30 days a month.
The rate cards
| Gemini 3.6 Flash | GPT-5.2 | |
|---|---|---|
| Input, per 1M tokens | $0.75 (Promotional rate until 2026-12-31 — standard rate $1.5/M) | $1.75 |
| Output, per 1M tokens | $3.75 (Promotional rate until 2026-12-31 — standard rate $7.5/M) | $14 |
| Cached input | $0.075 (Promotional rate until 2026-12-31 — standard rate $0.15/M) | $0.175 |
| Context window | 1.05M | 272K |
| Maximum output | 66K | 128K |
| Reasoning model | yes | yes |
| Vision | yes | yes |
Beyond the price
- Gemini 3.6 Flash reads up to 1.05M tokens of context in one request; GPT-5.2 stops at 272K.
- GPT-5.2 can write up to 128K tokens in one response, against 66K for Gemini 3.6 Flash.
Run this comparison on your own numbers
Full detail: Gemini 3.6 Flash pricing · GPT-5.2 pricing
More comparisons
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- GPT-5.2 vs Qwen 3.7 Max
- GPT-5.2 vs Gemini 3.1 Pro
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Common questions
Which is cheaper, Gemini 3.6 Flash or GPT-5.2?
Gemini 3.6 Flash is cheaper on all three workloads.
How much would Gemini 3.6 Flash and GPT-5.2 cost each month?
On PromptSpend's standard workloads, per month: support chatbot: Gemini 3.6 Flash $3,021, GPT-5.2 $9,174 (Gemini 3.6 Flash is cheaper by $6,154); document summarizer: Gemini 3.6 Flash $364, GPT-5.2 $977 (Gemini 3.6 Flash is cheaper by $612); coding agent: Gemini 3.6 Flash $2,106, GPT-5.2 $5,859 (Gemini 3.6 Flash is cheaper by $3,753). No prompt caching and no batch discount is assumed.
How do Gemini 3.6 Flash and GPT-5.2 differ apart from price?
Gemini 3.6 Flash reads up to 1.05M tokens of context in one request; GPT-5.2 stops at 272K. GPT-5.2 can write up to 128K tokens in one response, against 66K for Gemini 3.6 Flash.