tokevenGPTvsGPT
GPT 4 Turbo (2024-04-09) vs GPT 5.1
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
GPT 4 Turbo (2024-04-09)
FlagshipGPT 5.1
Mid-tierInput $/MTok
$10.00
$1.25
Output $/MTok
$30.00
$10.00
Cache discount
0% off
90% off
Context
128K
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 4 Turbo (2024-04-09)
GPT 5.1
Guidance
When to use GPT 4 Turbo (2024-04-09) vs GPT 5.1
Choose GPT 4 Turbo (2024-04-09) when...
- Similar performance; consider provider preference or ecosystem fit.
Choose GPT 5.1 when...
- -Cost matters: 88% cheaper on input tokens
- -You need a larger context window (272K vs 128K)
At scale
Cost at scale
Estimated cost assuming a seventy percent input and thirty percent output token split.
GPT 4 Turbo (2024-04-09)
GPT 5.1
100K tokens
$1.60
$0.39Cheaper
1M tokens
$16.00
$3.88Cheaper
10M tokens
$160.00
$38.75Cheaper
FAQ
When should I use GPT 4 Turbo (2024-04-09) instead of GPT 5.1?
GPT 4 Turbo (2024-04-09) and GPT 5.1 perform similarly across all tracked tasks. Pick based on pricing and provider preference.
Is GPT 5.1 cheaper than GPT 4 Turbo (2024-04-09)?
Yes. GPT 5.1 input costs $1.25/MTok vs $10.00/MTok for GPT 4 Turbo (2024-04-09), saving 88% on input.
What are the context window sizes for GPT 4 Turbo (2024-04-09) and GPT 5.1?
GPT 4 Turbo (2024-04-09) has a 128K 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 4 Turbo (2024-04-09) 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.