tokevenClaudevsGrok
Claude Opus 5 vs Grok 4.5
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
Claude Opus 5
FlagshipGrok 4.5
FlagshipInput $/MTok
$5.00
$2.00
Output $/MTok
$25.00
$6.00
Cache discount
90% off
85% off
Context
1M
500K
Quality
Task confidence comparison
Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
72
vs
61
Code Review
0
vs
0
Summarization
65
vs
71
Q&A
0
vs
0
Extraction
73
vs
72
Reasoning
91
vs
87
Classification
0
vs
0
Creative Writing
61
vs
74
Claude Opus 5
Grok 4.5
Guidance
When to use Claude Opus 5 vs Grok 4.5
Choose Claude Opus 5 when...
- -You need strong reasoning (confidence 91 vs 87)
- -You need strong extraction (confidence 73 vs 72)
- -You need strong code generation (confidence 72 vs 61)
- -You need a larger context window (1M vs 500K)
Choose Grok 4.5 when...
- -You need strong creative writing (confidence 74 vs 61)
- -You need strong summarization (confidence 71 vs 65)
- -Cost matters: 60% cheaper on input tokens
At scale
Cost at scale
Estimated cost assuming a seventy percent input and thirty percent output token split.
Claude Opus 5
Grok 4.5
100K tokens
$1.10
$0.32Cheaper
1M tokens
$11.00
$6.40Cheaper
10M tokens
$110.00
$64.00Cheaper
FAQ
When should I use Claude Opus 5 instead of Grok 4.5?
Claude Opus 5 outperforms Grok 4.5 for Code Generation, Extraction, Reasoning. It costs $5.00/$25.00 per million tokens (input/output).
Is Grok 4.5 cheaper than Claude Opus 5?
Yes. Grok 4.5 input costs $2.00/MTok vs $5.00/MTok for Claude Opus 5, saving 60% on input.
What are the context window sizes for Claude Opus 5 and Grok 4.5?
Claude Opus 5 has a 1M token context window. Grok 4.5 has a 500K 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 Grok 4.5 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.