Last verified 2025-09-22 (left) · 2025-09-22 (right)
Grok 4 vs o3 — Pricing & Capability Comparison
Grok 4 charges $3.00 per million input tokens and $15.00 per million output tokens. o3 comes in at $2.00 / $8.00. Context windows span 256K vs 200K tokens respectively.
Input price (per 1M)
Grok 4
$3.00
o3
$2.00
o3 leads here
Output price (per 1M)
Grok 4
$15.00
o3
$8.00
o3 leads here
Context window
Grok 4
256,000 tokens
o3
200,000 tokens
Grok 4 leads here
Cached input
Grok 4
$0.750
o3
Not published
Grok 4 leads here
Cost comparison for 10K-token workloads
Side-by-side pricing for identical workloads (10,000 total tokens per request) across different distributions.
| Scenario | Grok 4 | o3 | Grok 4 cached |
|---|---|---|---|
Balanced conversation 50% input · 50% output | $0.0900 | $0.0500 | $0.0788 |
Input-heavy workflow 80% input · 20% output | $0.0540 | $0.0320 | $0.0360 |
Generation heavy 30% input · 70% output | $0.114 | $0.0620 | $0.107 |
Cached system prompt 90% cached input · 10% fresh output | $0.0420 | $0.0260 | $0.0217 |
Frequently asked questions
Which model is cheaper per million input tokens?
o3 costs $2.00 per million input tokens versus $3.00 for Grok 4.
How do output prices compare?
o3 charges $8.00 per million output tokens, while Grok 4 costs $15.00 per million.
Which model supports a larger context window?
Grok 4 offers 256,000 tokens (256K) versus 200K for o3.