Last verified 2025-09-22 (left) · 2025-09-22 (right)
GPT-4o vs o3 — Pricing & Capability Comparison
GPT-4o charges $2.50 per million input tokens and $10.00 per million output tokens. o3 comes in at $2.00 / $8.00. Context windows span 128K vs 200K tokens respectively.
Input price (per 1M)
GPT-4o
$2.50
o3
$2.00
o3 leads here
Output price (per 1M)
GPT-4o
$10.00
o3
$8.00
o3 leads here
Context window
GPT-4o
128,000 tokens
o3
200,000 tokens
o3 leads here
Cached input
GPT-4o
$1.250
o3
Not published
GPT-4o 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 | GPT-4o | o3 | GPT-4o cached |
|---|---|---|---|
Balanced conversation 50% input · 50% output | $0.0625 | $0.0500 | $0.0563 |
Input-heavy workflow 80% input · 20% output | $0.0400 | $0.0320 | $0.0300 |
Generation heavy 30% input · 70% output | $0.0775 | $0.0620 | $0.0738 |
Cached system prompt 90% cached input · 10% fresh output | $0.0325 | $0.0260 | $0.0212 |
Frequently asked questions
Which model is cheaper per million input tokens?
o3 costs $2.00 per million input tokens versus $2.50 for GPT-4o.
How do output prices compare?
o3 charges $8.00 per million output tokens, while GPT-4o costs $10.00 per million.
Which model supports a larger context window?
o3 offers 200,000 tokens (200K) versus 128K for GPT-4o.