Gemini 3.8 Flash vs GPT-5.4 mini
Price and specs side by side · USD per 1M tokens · verified 2026-10-11
// side by side
| metric | Gemini 3.8 Flash | GPT-5.4 mini |
|---|---|---|
| input / 1M | $0.75 | $0.75 |
| output / 1M | $3.75 | $4.50 |
| blended (3:1) | $1.50 | $1.6875 |
| cache read / 1M | $0.075 | $0.075 |
| context | 1.05M | 400K |
| max output | 65.5K | 128K |
| input types | text · image · video · audio · pdf | text · image |
| reasoning | yes | yes |
| tool calling | yes | yes |
| structured output | yes | yes |
| open weights | no | no |
| released | 2026-09-02 | 2026-03-17 |
| knowledge cutoff | n/a | 2025-08-31 |
| lab | OpenAI |
// monthly cost scenarios
| workload | tokens in / out | Gemini 3.8 Flash | GPT-5.4 mini |
|---|---|---|---|
| Chatbot | 10M / 2M | $15.00 | $16.50 |
| RAG app | 50M / 5M | $56.25 | $60.00 |
| Coding agent | 20M / 10M | $52.50 | $60.00 |
// verdict
- Gemini 3.8 Flash is 11.1% cheaper than GPT-5.4 mini on a blended 3:1 input/output basis.
- Gemini 3.8 Flash has the larger context window (1.05M vs 400K tokens).