tokevenClaudevsGPT
Claude Opus 5 vs GPT 5.5
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
Claude Opus 5
FlagshipGPT 5.5
FlagshipInput $/MTok
$5.00
$5.00
Output $/MTok
$25.00
$30.00
Cache discount
90% off
90% off
Context
1M
1.1M
Quality
Task confidence comparison
Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
72
vs
65
Code Review
0
vs
90
Summarization
65
vs
70
Q&A
0
vs
90
Extraction
73
vs
78
Reasoning
91
vs
90
Classification
0
vs
85
Creative Writing
61
vs
73
Claude Opus 5
GPT 5.5
Guidance
When to use Claude Opus 5 vs GPT 5.5
Choose Claude Opus 5 when...
- -You need strong reasoning (confidence 91 vs 90)
- -You need strong code generation (confidence 72 vs 65)
Choose GPT 5.5 when...
- -You need strong extraction (confidence 78 vs 73)
- -You need strong creative writing (confidence 73 vs 61)
- -You need strong summarization (confidence 70 vs 65)
- -You need a larger context window (1.1M vs 1M)
At scale
Cost at scale
Estimated cost assuming a seventy percent input and thirty percent output token split.
Claude Opus 5
GPT 5.5
100K tokens
$1.10Cheaper
$1.25
1M tokens
$11.00Cheaper
$20.50
10M tokens
$110.00Cheaper
$205.00
FAQ
When should I use Claude Opus 5 instead of GPT 5.5?
Claude Opus 5 outperforms GPT 5.5 for Code Generation, Reasoning. It costs $5.00/$25.00 per million tokens (input/output).
Is GPT 5.5 cheaper than Claude Opus 5?
Both models have the same input pricing at $5.00/MTok. Compare output pricing: $25.00 vs $30.00/MTok.
What are the context window sizes for Claude Opus 5 and GPT 5.5?
Claude Opus 5 has a 1M token context window. GPT 5.5 has a 1.1M 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 Claude Opus 5 and GPT 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.