tokevenGPTvsGPT
GPT 5 Pro vs o3 Pro
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
GPT 5 Pro
Flagshipo3 Pro
FlagshipInput $/MTok
$15.00
$20.00
Output $/MTok
$120.00
$80.00
Cache discount
0% off
0% off
Context
400K
200K
Quality
Task confidence comparison
Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
0
vs
0
Code Review
0
vs
0
Summarization
0
vs
0
Q&A
0
vs
0
Extraction
0
vs
0
Reasoning
0
vs
0
Classification
0
vs
0
Creative Writing
0
vs
0
GPT 5 Pro
o3 Pro
Guidance
When to use GPT 5 Pro vs o3 Pro
Choose GPT 5 Pro when...
- -Cost matters: 25% cheaper on input tokens
- -You need a larger context window (400K vs 200K)
Choose o3 Pro when...
- Similar performance; consider provider preference or ecosystem fit.
At scale
Cost at scale
Estimated cost assuming a seventy percent input and thirty percent output token split.
GPT 5 Pro
o3 Pro
100K tokens
$4.65
$3.80Cheaper
1M tokens
$46.50
$38.00Cheaper
10M tokens
$465.00
$380.00Cheaper
FAQ
When should I use GPT 5 Pro instead of o3 Pro?
GPT 5 Pro and o3 Pro perform similarly across all tracked tasks. Pick based on pricing and provider preference.
Is o3 Pro cheaper than GPT 5 Pro?
o3 Pro input costs $20.00/MTok, which is 33% more than GPT 5 Pro at $15.00/MTok.
What are the context window sizes for GPT 5 Pro and o3 Pro?
GPT 5 Pro has a 400K token context window. o3 Pro has a 200K token context window.
Go deeper on either model
Per-call cost calculators, provider lineups, and price history for both models on this page.
Other comparisons
How GPT 5 Pro and o3 Pro stack up against the rest of the field.
Track your real costs
Comparisons show estimated costs at list price. The dashboard reveals your real spend and savings.