Comparison
Gemini 3.5 Flash vs GPT-5.4 mini
GPT-5.4 mini costs 50% less per input token than Gemini 3.5 Flash. GPT-5.4 mini is 50% cheaper on output tokens. Gemini 3.5 Flash accepts more context per request than GPT-5.4 mini.
| Field | Gemini 3.5 Flash | GPT-5.4 mini |
|---|---|---|
| Provider | OpenAI | |
| Context window | 1M | 400K |
| Max output | 65.5K | 128K |
| Input / 1M | $1.50 | $0.7550% cheaper |
| Output / 1M | $9.00 | $4.5050% cheaper |
| Cached input / 1M | $0.15 | $0.07550% cheaper |
| Batch discount | 50% | 50% |
| Release date | — | 2026-03-17 |
Worked cost examples
Estimated monthly cost on three common usage shapes
| Workload | Gemini 3.5 Flash | GPT-5.4 mini |
|---|---|---|
Chatbot 800 input / 200 output tokens per request, 100,000 requests/month | $300.00 | $150.00cheaper |
RAG pipeline 6,000 input / 700 output tokens per request, 30,000 requests/month | $459.00 | $229.50cheaper |
Batch summarization 20,000 input / 1,500 output tokens per request, 5,000 requests/month | $217.50 | $108.75cheaper |
Gemini 3.5 Flash vs GPT-5.4 mini FAQ
- Is Gemini 3.5 Flash cheaper than GPT-5.4 mini?
- Gemini 3.5 Flash costs $1.50 per 1M input tokens versus $0.75 for GPT-5.4 mini — GPT-5.4 mini is 100% cheaper per input token.
- Which is cheaper for output tokens, Gemini 3.5 Flash or GPT-5.4 mini?
- Gemini 3.5 Flash charges $9.00 per 1M output tokens; GPT-5.4 mini charges $4.50 per 1M output tokens.
- Which has the larger context window, Gemini 3.5 Flash or GPT-5.4 mini?
- Gemini 3.5 Flash does, with a 1,048,576-token context window.
- Do Gemini 3.5 Flash and GPT-5.4 mini offer cache pricing?
- Gemini 3.5 Flash discounts cached input to $0.15 per 1M tokens. GPT-5.4 mini discounts cached input to $0.075 per 1M tokens.
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