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Grok 4 vs Grok 3
Side-by-side pricing, context window, features, and per-use-case verdict. Data sourced from LiteLLM, updated regularly.
Specifications
| Feature | Grok 4 | Grok 3 |
|---|---|---|
| Provider | xai | xai |
| Model ID | xai/grok-4 | xai/grok-3 |
| Input / 1M tokens | $3.00 | $3.00 |
| Output / 1M tokens | $15.00 | $15.00 |
| Cached input / 1M | — | $0.75 |
| Context window | 256kk tokens | 131kk tokens |
| Max output | 256kk tokens | 131kk 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 | Grok 3 | Winner |
|---|---|---|---|
| Small 1M in / 0.2M out | $6.00 | $6.00 | Grok 4 |
| Medium 10M in / 2M out | $60.00 | $60.00 | Grok 4 |
| Large 100M in / 20M out | $600 | $600 | Grok 4 |
Category winners
Cheapest input
Grok 4
$3.00/M
Cheapest output
Grok 4
$15.00/M
Larger context
Grok 4
256kk tokens · 95% larger window
More features
Grok 4
3 / 5 capabilities
(tied)
Better for…
High-volume RAG & repeated context
$0.75/M cached input — prompt caching makes repeated context retrieval significantly cheaper
Grok 3
Short interactions & high-throughput APIs
$15.00/M output — 0% cheaper on output at scale
Grok 4
Long-document processing & large codebases
256k context window vs 131k — 95% larger context
Grok 4
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.