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Grok 4 vs Gemini 3 Pro Preview
Side-by-side pricing, context window, features, and per-use-case verdict. Data sourced from LiteLLM, updated regularly.
Specifications
| Feature | Grok 4 | Gemini 3 Pro Preview |
|---|---|---|
| Provider | xai | vertex ai-language-models |
| Model ID | xai/grok-4 | gemini-3-pro-preview |
| Input / 1M tokens | $3.00 | $2.00 (33% cheaper) |
| Output / 1M tokens | $15.00 | $12.00 (20% cheaper) |
| Cached input / 1M | — | $0.20 |
| Context window | 256kk tokens | 1049kk tokens |
| Max output | 256kk tokens | 66kk tokens |
| Vision | ⬜ | ✅ |
| Function calling | ✅ | ✅ |
| Prompt caching | ✅ | ✅ |
| Web search | ✅ | ✅ |
| JSON schema | ⬜ | ✅ |
Monthly cost comparison
No cache discount applied — pure token costs at three usage scales.
| Scale | Grok 4 | Gemini 3 Pro Preview | Winner |
|---|---|---|---|
| Small 1M in / 0.2M out | $6.00 | $4.40 | Gemini 3 Pro Preview saves 27% |
| Medium 10M in / 2M out | $60.00 | $44.00 | Gemini 3 Pro Preview saves 27% |
| Large 100M in / 20M out | $600 | $440 | Gemini 3 Pro Preview saves 27% |
Category winners
Cheapest input
Gemini 3 Pro Preview
$2.00/M
· 33% less than the other
Cheapest output
Gemini 3 Pro Preview
$12.00/M
· 20% less than the other
Larger context
Gemini 3 Pro Preview
1049kk tokens · 310% larger window
More features
Gemini 3 Pro Preview
5 / 5 capabilities
Better for…
High-volume RAG & repeated context
$0.20/M cached input — prompt caching makes repeated context retrieval significantly cheaper
Gemini 3 Pro Preview
Short interactions & high-throughput APIs
$12.00/M output — 20% cheaper on output at scale
Gemini 3 Pro Preview
Long-document processing & large codebases
1049k context window vs 256k — 310% larger context
Gemini 3 Pro Preview
Agentic workflows & tool use
Supports 5 of 5 tracked capabilities (vision, function calling, caching, web search, JSON schema)
Gemini 3 Pro Preview
Deep-dive on each model
Pricing data sourced from LiteLLM and refreshed regularly. Always verify with each provider's official pricing page before making business decisions.