Gemini 3.5 Flash vs GPT-4o Mini
google/gemini-3.5-flash · openai/gpt-4o-mini
As of November 7, 2026, GPT-4o Mini is the cheaper API on UberLLM: $0.0045 per million input tokens and $0.0179 per million output, versus $0.0075 / $0.0450 for Gemini 3.5 Flash, about 59% less when output is 3 tokens for every input token. These are the best prices on the market right now. Both work with one OpenAI-compatible key and UberLLM adds no fee. Choose GPT-4o Mini to cut cost; choose Gemini 3.5 Flash when context size wins. Gemini 3.5 Flash carries the larger context window (1,000,000 vs 128,000 tokens), which can matter for long-document work.
Gemini 3.5 Flash vs GPT-4o Mini, side by side
| Spec | Gemini 3.5 Flash | GPT-4o Mini |
|---|---|---|
| Price · input / 1M | $0.0075 | $0.0045 |
| Price · output / 1M | $0.0450 | $0.0179 |
| Context length | 1,000,000 | 128,000 |
| Max output tokens | 65,536 | 16,384 |
| Input modalities | text, image | text, image |
| Output modalities | text | text |
| Tools / functions | Yes | Yes |
| Vision (image input) | Yes | Yes |
| % off list | 99.5% off | 97% off |
Best prices on UberLLM right now. No UberLLM fee on requests; adding credit by card costs 5.5% + $0.50. Updated November 7, 2026. A price more than 70% below list is what buyers were billed, not an error. Why so cheap?
Gemini 3.5 Flash vs GPT-4o Mini — FAQ
Is Gemini 3.5 Flash or GPT-4o Mini cheaper?
GPT-4o Mini is cheaper on a blended token mix, by about 59%. A request costs what its provider charged, UberLLM adds no fee, and every request is listed with its cost in Activity.
What's the price difference between Gemini 3.5 Flash and GPT-4o Mini?
Gemini 3.5 Flash: $0.0075 in / $0.0450 out per 1M tokens. GPT-4o Mini: $0.0045 in / $0.0179 out per 1M tokens. That's roughly a 59% blended difference. Prices are live; UberLLM adds no fee.
Can I use both Gemini 3.5 Flash and GPT-4o Mini with one API?
Yes. Both are served through a single OpenAI-compatible endpoint — set the base URL to https://api.uberllm.dev/v1 and your UberLLM key, then switch between them by changing the model id. Anthropic SDKs work via https://api.uberllm.dev/v1/messages.