Gemini 3 Flash Preview vs Grok 4.3
google/gemini-3-flash-preview · x-ai/grok-4.3
As of November 7, 2026, Gemini 3 Flash Preview is the cheaper API on UberLLM: $0.0025 per million input tokens and $0.0150 per million output, versus $0.0124 / $0.0248 for Grok 4.3, about 45% 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 Gemini 3 Flash Preview to cut cost; choose Grok 4.3 when context size wins. Grok 4.3 carries the larger context window (1,000,000 vs 256,000 tokens), which can matter for long-document work.
Gemini 3 Flash Preview vs Grok 4.3, side by side
| Spec | Gemini 3 Flash Preview | Grok 4.3 |
|---|---|---|
| Price · input / 1M | $0.0025 | $0.0124 |
| Price · output / 1M | $0.0150 | $0.0248 |
| Context length | 256,000 | 1,000,000 |
| Max output tokens | 65,536 | 128,000 |
| Input modalities | text, image | text, image |
| Output modalities | text | text |
| Tools / functions | Yes | Yes |
| Vision (image input) | Yes | Yes |
| Reasoning | Yes | Yes |
| % off list | 99.5% off | 99% 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 Flash Preview vs Grok 4.3 — FAQ
Is Gemini 3 Flash Preview or Grok 4.3 cheaper?
Gemini 3 Flash Preview is cheaper on a blended token mix, by about 45%. 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 Flash Preview and Grok 4.3?
Gemini 3 Flash Preview: $0.0025 in / $0.0150 out per 1M tokens. Grok 4.3: $0.0124 in / $0.0248 out per 1M tokens. That's roughly a 45% blended difference. Prices are live; UberLLM adds no fee.
Can I use both Gemini 3 Flash Preview and Grok 4.3 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.