tokevenGPTvsDeepSeek
o3 vs DeepSeek Flash
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
o3
Mid-tierDeepSeek Flash
Fast / BudgetInput $/MTok
$2.00
$0.15
Output $/MTok
$8.00
$0.60
Cache discount
75% off
98% off
Context
200K
1M
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
o3
DeepSeek Flash
Guidance
When to use o3 vs DeepSeek Flash
Choose o3 when...
- Similar performance; consider provider preference or ecosystem fit.
Choose DeepSeek Flash when...
- -Cost matters: 93% cheaper on input tokens
- -You need a larger context window (1M vs 200K)
At scale
Cost at scale
Estimated cost assuming a seventy percent input and thirty percent output token split.
o3
DeepSeek Flash
100K tokens
$0.38
$0.03Cheaper
1M tokens
$3.80
$0.28Cheaper
10M tokens
$38.00
$2.85Cheaper
FAQ
When should I use o3 instead of DeepSeek Flash?
o3 and DeepSeek Flash perform similarly across all tracked tasks. Pick based on pricing and provider preference.
Is DeepSeek Flash cheaper than o3?
Yes. DeepSeek Flash input costs $0.15/MTok vs $2.00/MTok for o3, saving 93% on input.
What are the context window sizes for o3 and DeepSeek Flash?
o3 has a 200K 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 o3 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.