tokevenClaudevsClaude
Claude Opus 4.5 vs Claude Opus 5.5
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
Claude Opus 4.5
FlagshipClaude Opus 5.5
FlagshipInput $/MTok
$5.00
$4.00
Output $/MTok
$25.00
$20.00
Cache discount
90% off
95% 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
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
Claude Opus 4.5
Claude Opus 5.5
Guidance
When to use Claude Opus 4.5 vs Claude Opus 5.5
Choose Claude Opus 4.5 when...
- Similar performance; consider provider preference or ecosystem fit.
Choose Claude Opus 5.5 when...
- -Cost matters: 20% cheaper on input tokens
- -You need a larger context window (1,000K vs 200K)
At scale
Cost at scale
Estimated cost assuming a seventy percent input and thirty percent output token split.
Claude Opus 4.5
Claude Opus 5.5
100K tokens
$1.10
$0.88Cheaper
1M tokens
$11.00
$8.80Cheaper
10M tokens
$110.00
$88.00Cheaper
FAQ
When should I use Claude Opus 4.5 instead of Claude Opus 5.5?
Claude Opus 4.5 and Claude Opus 5.5 perform similarly across all tracked tasks. Pick based on pricing and provider preference.
Is Claude Opus 5.5 cheaper than Claude Opus 4.5?
Yes. Claude Opus 5.5 input costs $4.00/MTok vs $5.00/MTok for Claude Opus 4.5, saving 20% on input.
What are the context window sizes for Claude Opus 4.5 and Claude Opus 5.5?
Claude Opus 4.5 has a 200K token context window. Claude Opus 5.5 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 Opus 4.5 and Claude Opus 5.5 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.