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Claude Haiku 4.5 vs Claude Opus 5
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
Claude Haiku 4.5
Fast / BudgetClaude Opus 5
FlagshipInput $/MTok
$1.00
$5.00
Output $/MTok
$5.00
$25.00
Cache discount
90% off
90% off
Context
200K
1,000K
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
Claude Opus 5
Guidance
When to use Claude Haiku 4.5 vs Claude Opus 5
Choose Claude Haiku 4.5 when...
- -Cost matters: 80% cheaper on input tokens
Choose Claude Opus 5 when...
- -You need a larger context window (1,000K vs 200K)
- 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
Claude Opus 5
100K tokens
$0.22Cheaper
$1.10
1M tokens
$2.20Cheaper
$11.00
10M tokens
$22.00Cheaper
$110.00
FAQ
When should I use Claude Haiku 4.5 instead of Claude Opus 5?
Claude Haiku 4.5 and Claude Opus 5 perform similarly across all tracked tasks. Pick based on pricing and provider preference.
Is Claude Opus 5 cheaper than Claude Haiku 4.5?
Claude Opus 5 input costs $5.00/MTok, which is 400% more than Claude Haiku 4.5 at $1.00/MTok.
What are the context window sizes for Claude Haiku 4.5 and Claude Opus 5?
Claude Haiku 4.5 has a 200K token context window. Claude Opus 5 has a 1,000K 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 Claude Opus 5 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.