Grok 4 vs Grok 3
Detailed pricing comparison and cost analysis.
Updated March 2026
Cost Simulator
| Feature | Grok 4 | Grok 3 |
|---|---|---|
| Provider | xAI | xAI |
| Input Price (1M) | $3.00 | $3.00 |
| Output Price (1M) | $15.00 | $15.00 |
| Context Window | 256,000 | 131,000 |
Verdict
Grok 4 costs $3.00 per 1M input tokens and $15.00 per 1M output tokens. Grok 3 costs $3.00 per 1M input tokens and $15.00 per 1M output tokens. Grok 4 and Grok 3 have identical input token pricing. For output tokens, Grok 4 is the more affordable option at $15.00/1M vs $15.00.
On context window, Grok 4 supports 256,000 tokens — meaning it can fit more conversation history, documents, or code in a single request. This matters for RAG pipelines, long document analysis, and agentic workflows where context builds up over many turns.
When to choose Grok 4
- ✓ You need a larger context window (256,000 tokens)
- ✓ You are already integrated with xAI
When to choose Grok 3
- ✓ You are already integrated with xAI
Use the calculator above to simulate your specific workload and find the exact break-even point. For most applications, the cheapest model is the one that minimises your total monthly bill given your input-to-output token ratio.