GOOGLE VS XAI
Gemini 3.1 Flash-Lite vs Grok 4.3
Gemini 3.1 Flash-Lite is about 2.8x cheaper than Grok 4.3 on a blended 3:1 input:output rate — the same 10K-in/2K-out request costs $0.0055 vs $0.0175. Gemini 3.1 Flash-Lite has the larger context window (1,048,576 vs 1,000,000 tokens).
Pricing verified
API pricing per 1M tokens
| Model | Input / 1M tokens | Output / 1M tokens | Blended (3:1 mix) |
|---|---|---|---|
| Gemini 3.1 Flash-Lite | $0.25 | $1.50 | $0.563 |
| Grok 4.3 | $1.25 | $2.50 | $1.563 |
Rates from official Google pricing and official xAI pricing, checked 2026-08-11.
What a real workload costs
Example: one request with 10,000 input tokens and 2,000 output tokens, then that request at 100,000 runs per month.
| Model | Per request (10K in / 2K out) | Per month (100K requests) | Monthly delta |
|---|---|---|---|
| Gemini 3.1 Flash-Lite | $0.0055 | $550 | — |
| Grok 4.3 | $0.0175 | $1,750 | +$1,200 |
Model your own prompt sizes and volumes in the token cost analyzer, or check caching savings with the prompt caching calculator.
Specs side by side
| Spec | Gemini 3.1 Flash-Lite | Grok 4.3 |
|---|---|---|
| Provider | xAI | |
| Context window | 1,048,576 tokens | 1,000,000 tokens |
| Model class | General text | Reasoning |
| Tokenizer | Proprietary (counts estimated) | Proprietary (counts estimated) |
Count tokens for each model on its own page: Gemini 3.1 Flash-Lite token counter and Grok 4.3 token counter. All Google models are on the Gemini Token Counter. All xAI models are on the Grok Token Counter.
FAQ
Gemini 3.1 Flash-Lite vs Grok 4.3 FAQ
Which is cheaper, Gemini 3.1 Flash-Lite or Grok 4.3?
Gemini 3.1 Flash-Lite is cheaper. At rates checked 2026-08-11, Gemini 3.1 Flash-Lite costs $0.25 input / $1.50 output per 1M tokens, while Grok 4.3 costs $1.25 input / $2.50 output — about a 2.8x difference on a typical 3:1 input-heavy workload.
How much does a real request cost on Gemini 3.1 Flash-Lite vs Grok 4.3?
A request with 10,000 input tokens and 2,000 output tokens costs about $0.0055 on Gemini 3.1 Flash-Lite and $0.0175 on Grok 4.3. At 100,000 such requests per month that is $550 vs $1,750 — a difference of $1,200 per month.
Which has the bigger context window, Gemini 3.1 Flash-Lite or Grok 4.3?
Gemini 3.1 Flash-Lite. It supports 1,048,576 tokens of context versus 1,000,000 tokens — roughly 786,000 English words in one request.
Do Gemini 3.1 Flash-Lite and Grok 4.3 count tokens the same way?
Not exactly. Gemini 3.1 Flash-Lite uses a proprietary tokenizer (counts are estimates) and Grok 4.3 uses a proprietary tokenizer (counts are estimates). The same prompt will tokenize differently, which shifts effective cost per word.