Grok 3 vs Grok 4
Grok 3 vs Grok 4: Grok 3 is cheaper by 0% on average. Grok 3 from xAI (131,072-token context, tool calls) vs. Grok 4 from xAI (256,000-token context, tool calls). Use Agent Command Center to A/B both in shadow mode and pick the winner per workload.
Side-by-side cost
Live workload comparison
Same workload run through both models. The cheaper one is highlighted.
3,000
0256,000
400
0200,000
5,000
01,000,000
At this workload, Grok 4 is 0% cheaper than Grok 3 — a savings of $0.000000/month ($0.000000/year).
Production recipe — Agent Command Center
strategy: cost-optimized
primary:
model: grok-4
provider: xai
fallback:
model: grok-3
provider: xai
shadow: { sample_rate: 0.05 } # mirror 5% of traffic to compare quality live| Grok 3 | Grok 4 | |
|---|---|---|
| Input price | $3.00/M | $3.00/M |
| Output price | $15.00/M | $15.00/M |
| Context window | 131,072 | 256,000 |
| Max output | 131,072 | 256,000 |
| Function calling | ✓ | ✓ |
| Vision | — | — |
| Audio input | — | — |
| Reasoning | — | — |
| Prompt caching | ✓ | ✓ |
| Structured output | — | — |
| Pricing verified | May 12, 2026 | May 12, 2026 |
Cheaper option
Benchmark comparison
Side-by-side public benchmark scores. Greener bar = winner.
Chatbot Arena ELOgeneral
Grok 3
1,402
Grok 4
1,459