Gemini 3.1 Pro Preview vs Grok Build 0.1 pricing
- For the Chatbot workload, Grok Build 0.1 costs 4.0× less than Gemini 3.1 Pro Preview.
- For the RAG workload, Grok Build 0.1 costs 2.4× less than Gemini 3.1 Pro Preview.
- For the Coding agent workload, Grok Build 0.1 costs 2.4× less than Gemini 3.1 Pro Preview.
Prices
| USD per 1M tokens | Gemini 3.1 Pro Preview | Grok Build 0.1 |
|---|---|---|
| Input | $2.00 | $1.00 |
| Output | $12.00 | $2.00 |
| Cache read | $0.20 | $0.20 |
| Cache write | Not published | Not published |
| Batch input | $1.00 | Not published |
| Batch output | $6.00 | Not published |
Verified against the provider's official pricing page on Oct 9, 2026. Official pricing page
xAI's list price for its own API, as compiled by models.dev and checked Oct 10, 2026, 09:00 UTC. Prices on cloud platforms and resellers can differ. Provider documentation
Monthly cost by workload
| Workload | Gemini 3.1 Pro Preview | Grok Build 0.1 |
|---|---|---|
| Chatbot1,000 in / 500 out tokens, 10,000 requests a day | $2,400/mo | $600.00/mo |
| RAG8,000 in / 500 out tokens, 5,000 requests a day | $3,300/mo | $1,350/mo |
| Coding agent50,000 in / 2,000 out tokens, 1,000 requests a day, 80% cached input | $1,560/mo | $660.00/mo |
Cost = input tokens × input price + output tokens × output price, 30 days a month. Cached input uses the cache read price. Cache write fees are not included.
Context and capabilities
| Gemini 3.1 Pro Preview | Grok Build 0.1 | |
|---|---|---|
| Context | 1,048,576 tokens | 256,000 tokens |
| Max output | 65,536 tokens | 256,000 tokens |
| Input | text, image, video, audio, pdf | text, image, pdf |
| Tool calling | Yes | Yes |
| Reasoning | Yes | Yes |
| Structured outputs | Yes | Yes |
Questions
- What is the price difference between Gemini 3.1 Pro Preview and Grok Build 0.1?
- Gemini 3.1 Pro Preview: $2.00 per 1M input tokens and $12.00 per 1M output tokens. Grok Build 0.1: $1.00 per 1M input tokens and $2.00 per 1M output tokens. For the Chatbot workload (1,000 in / 500 out tokens, 10,000 requests a day), that is about $2,400 per month for Gemini 3.1 Pro Preview and $600.00 for Grok Build 0.1.
- Which has the longer context window, Gemini 3.1 Pro Preview or Grok Build 0.1?
- Gemini 3.1 Pro Preview has the longer context window: up to 1,048,576 tokens, compared with 256,000 for Grok Build 0.1.
- Do Gemini 3.1 Pro Preview and Grok Build 0.1 have prompt caching and batch prices?
- Gemini 3.1 Pro Preview: cached input $0.20 per 1M tokens; batch $1.00 per 1M input tokens and $6.00 per 1M output tokens. Grok Build 0.1: cached input $0.20 per 1M tokens; no batch price published.