tokevenGPTvsDeepSeek
GPT 5.4 vs DeepSeek Flash
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
GPT 5.4
Mid-tierDeepSeek Flash
Fast / BudgetInput $/MTok
$2.50
$0.15
Output $/MTok
$15.00
$0.60
Cache discount
90% off
98% off
Context
1.1M
1M
Quality
Task confidence comparison
Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
63
vs
0
Code Review
82
vs
0
Summarization
67
vs
0
Q&A
91
vs
0
Extraction
76
vs
0
Reasoning
88
vs
0
Classification
88
vs
0
Creative Writing
79
vs
0
GPT 5.4
DeepSeek Flash
Guidance
When to use GPT 5.4 vs DeepSeek Flash
Choose GPT 5.4 when...
- -You need a larger context window (1.1M vs 1M)
- Similar performance; consider provider preference or ecosystem fit.
Choose DeepSeek Flash when...
- -Cost matters: 94% cheaper on input tokens
At scale
Cost at scale
Estimated cost assuming a seventy percent input and thirty percent output token split.
GPT 5.4
DeepSeek Flash
100K tokens
$0.63
$0.03Cheaper
1M tokens
$10.25
$0.28Cheaper
10M tokens
$102.50
$2.85Cheaper
FAQ
When should I use GPT 5.4 instead of DeepSeek Flash?
GPT 5.4 and DeepSeek Flash perform similarly across all tracked tasks. Pick based on pricing and provider preference.
Is DeepSeek Flash cheaper than GPT 5.4?
Yes. DeepSeek Flash input costs $0.15/MTok vs $2.50/MTok for GPT 5.4, saving 94% on input.
What are the context window sizes for GPT 5.4 and DeepSeek Flash?
GPT 5.4 has a 1.1M token context window. DeepSeek Flash has a 1M 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 5.4 and DeepSeek Flash 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.