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
200K
1,050K
Quality
Task confidence comparison
Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
95
vs
91
Code Review
94
vs
90
Summarization
88
vs
89
Q&A
85
vs
90
Extraction
82
vs
87
Reasoning
97
vs
95
Classification
80
vs
85
Creative Writing
93
vs
91
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 reasoning (confidence 97 vs 95)
- -You need strong code generation (confidence 95 vs 91)
- -You need strong code review (confidence 94 vs 90)
- -You need strong creative writing (confidence 93 vs 91)
Choose GPT 5.5 when...
- -You need strong q&a (confidence 90 vs 85)
- -You need strong summarization (confidence 89 vs 88)
- -You need strong extraction (confidence 87 vs 82)
- -You need strong classification (confidence 85 vs 80)
- -You need a larger context window (1,050K vs 200K)
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 Reasoning, Code Generation, Code Review. 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 200K token context window. GPT 5.5 has a 1,050K 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.