tokevenClaudevsGPT
Claude Haiku 4.5 vs o3
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
Claude Haiku 4.5
Fast / Budgeto3
Mid-tierInput $/MTok
$1.00
$2.00
Output $/MTok
$5.00
$8.00
Cache discount
90% off
75% off
Context
200K
200K
Quality
Task confidence comparison
Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
72
vs
0
Code Review
70
vs
0
Summarization
82
vs
0
Q&A
86
vs
0
Extraction
88
vs
0
Reasoning
65
vs
0
Classification
90
vs
0
Creative Writing
60
vs
0
Claude Haiku 4.5
o3
Guidance
When to use Claude Haiku 4.5 vs o3
Choose Claude Haiku 4.5 when...
- -Cost matters: 50% cheaper on input tokens
Choose o3 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.
Claude Haiku 4.5
o3
100K tokens
$0.22Cheaper
$0.38
1M tokens
$2.20Cheaper
$3.80
10M tokens
$22.00Cheaper
$38.00
FAQ
When should I use Claude Haiku 4.5 instead of o3?
Claude Haiku 4.5 and o3 perform similarly across all tracked tasks. Pick based on pricing and provider preference.
Is o3 cheaper than Claude Haiku 4.5?
o3 input costs $2.00/MTok, which is 100% more than Claude Haiku 4.5 at $1.00/MTok.
What are the context window sizes for Claude Haiku 4.5 and o3?
Claude Haiku 4.5 has a 200K token context window. o3 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 Claude Haiku 4.5 and o3 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.