tokevenClaudevsGPT
Claude Opus 4.8 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 4.8
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
63
vs
65
Code Review
94
vs
90
Summarization
69
vs
70
Q&A
85
vs
90
Extraction
73
vs
78
Reasoning
89
vs
90
Classification
80
vs
85
Creative Writing
81
vs
73
Claude Opus 4.8
GPT 5.5
Guidance
When to use Claude Opus 4.8 vs GPT 5.5
Choose Claude Opus 4.8 when...
- -You need strong code review (confidence 94 vs 90)
- -You need strong creative writing (confidence 81 vs 73)
Choose GPT 5.5 when...
- -You need strong q&a (confidence 90 vs 85)
- -You need strong reasoning (confidence 90 vs 89)
- -You need strong classification (confidence 85 vs 80)
- -You need strong extraction (confidence 78 vs 73)
- -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 4.8
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 4.8 instead of GPT 5.5?
Claude Opus 4.8 outperforms GPT 5.5 for Code Review, Creative Writing. It costs $5.00/$25.00 per million tokens (input/output).
Is GPT 5.5 cheaper than Claude Opus 4.8?
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 4.8 and GPT 5.5?
Claude Opus 4.8 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 4.8 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.