OpenAI · released 2025-09
o4
Reasoning model. Thinks before it speaks.
context
200K
output max
100K
input /M
$15.00
output /M
$60.00
modalities
T·I
Verdict
What it's actually good at
Strengths
- +State-of-the-art math & science
- +Complex planning
Weaknesses
- −High latency
- −Expensive for chat
Our scores
reasoning
10.0
coding
9.0
writing
7.0
speed
3.0
value
5.0
Extended-thinking reasoning model for hard math, science, and planning. Slower and pricier per call, but far stronger on proofs and agents.
Pricing
Cost at common volumes
| Monthly volume | Input | Output | Est. monthly |
|---|---|---|---|
| Side project | 1M tok | 0.3M tok | $33.00 |
| Growing app | 50M tok | 15M tok | $1650.00 |
| Production | 500M tok | 150M tok | $16500.00 |
| Scale | 5000M tok | 1500M tok | $165000.00 |
Estimates assume uncached input. Prompt caching and batch APIs can cut this by 50–90% for many workloads. Use the calculator →
Head-to-head