Model comparison
Gemini 3.1 Pro Preview vs Grok Build 0.1
Compare Gemini 3.1 Pro Preview vs Grok Build 0.1 API pricing: input/output token costs, cache pricing, context windows, workload estimates, and routing fit.
Gemini 3.1 Pro Preview
gemini · gemini-3.1-pro-preview
- Input
- $2
- Output
- $12
- Context
- 1M
Grok Build 0.1
xai · grok-build-0.1
- Input
- $1
- Output
- $2
- Context
- 256K
Quick take
Grok Build 0.1 has the lower input price at $1 per 1M input tokens. Grok Build 0.1 is cheaper for the example blended workload below. Gemini 3.1 Pro Preview has the larger context window at 1M tokens.
Choose Gemini 3.1 Pro Preview if...
- Gemini 3.1 Pro Preview is safer for long documents, repository analysis, and RAG prompts because it has the larger context window.
- Gemini 3.1 Pro Preview gives more room for long generated answers, reports, or code output.
Choose Grok Build 0.1 if...
- Grok Build 0.1 is the better default for cost-sensitive traffic and repeated high-volume calls.
Example workload cost
Estimates use input tokens plus 20% output tokens. They exclude provider discounts, cache hits, and tool/search surcharges.
| Workload | Gemini 3.1 Pro Preview | Grok Build 0.1 | Cheaper |
|---|---|---|---|
| 1M input + 200K output | $4.40 | $1.40 | Grok Build 0.1 |
| 10M input + 2M output | $44.00 | $14.00 | Grok Build 0.1 |
| 100M input + 20M output | $440.00 | $140.00 | Grok Build 0.1 |
Context, output, and capability fit
Gemini 3.1 Pro Preview provides the larger context window. Check max output separately when the task needs long reports, code generation, or full-document rewrites.
- Gemini 3.1 Pro Preview max output
- 65.5K
- Grok Build 0.1 max output
- n/a
- Gemini 3.1 Pro Preview features
- prompt caching, function calling, vision
- Grok Build 0.1 features
- prompt caching, function calling, vision
Risk notes for Gemini 3.1 Pro Preview
- Preview or beta model: verify availability and pricing before production rollout.
Risk notes for Grok Build 0.1
- No major capability risk is flagged in this snapshot, but provider pages should still be verified before production routing.
Routing tags
frontierpreviewreasoninglong-contextmultimodalenterprise-ragragbudgetcodingagentscache-friendly