Side by side pricing and context for Grok 3 and Grok 4. Rates are curated catalog values with last verified dates on each model page.
Grok 3
Prior Grok generation with optional cached input pricing. Solid mid Grok option while you evaluate Grok 4 migration cost.
Input $3.00 / Output $15.00 per 1M
Context 131.1K · Approx
Grok 4
xAI frontier Grok for general chat and reasoning-style apps. Use when you want the Grok stack; confirm rates on xAI docs as the lineup moves quickly.
Input $3.00 / Output $15.00 per 1M
Context 256K · Approx
Quick take
- Input rates match on this snapshot.
- Output rates match on this snapshot.
- Both last verified on their model pages (2026-08-02 / 2026-08-02).
Rate table
| Metric | Grok 3 | Grok 4 |
|---|---|---|
| Input / 1M | $3.00 | $3.00 |
| Output / 1M | $15.00 | $15.00 |
| Cached input / 1M | $0.750 | n/a |
| Context | 131.1K | 256K |
| Tokenizer | Approx | Approx |