tokevenGPTvsGPT
GPT 5 vs GPT 5.1
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
GPT 5
Mid-tierGPT 5.1
Mid-tierInput $/MTok
$1.25
$1.25
Output $/MTok
$10.00
$10.00
Cache discount
90% off
90% off
Context
272K
272K
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
GPT 5.1
Guidance
When to use GPT 5 vs GPT 5.1
Choose GPT 5 when...
- Similar performance; consider provider preference or ecosystem fit.
Choose GPT 5.1 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
GPT 5.1
100K tokens
$0.39
$0.39
1M tokens
$3.88
$3.88
10M tokens
$38.75
$38.75
FAQ
When should I use GPT 5 instead of GPT 5.1?
GPT 5 and GPT 5.1 perform similarly across all tracked tasks. Pick based on pricing and provider preference.
Is GPT 5.1 cheaper than GPT 5?
Both models have the same input pricing at $1.25/MTok. Compare output pricing: $10.00 vs $10.00/MTok.
What are the context window sizes for GPT 5 and GPT 5.1?
GPT 5 has a 272K token context window. GPT 5.1 has a 272K 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 and GPT 5.1 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.