tokevenClaudevsGemini
Claude Opus 5 vs Gemini 3 Flash
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
Claude Opus 5
FlagshipGemini 3 Flash
Fast / BudgetInput $/MTok
$5.00
$0.50
Output $/MTok
$25.00
$3.00
Cache discount
90% off
90% off
Context
1M
1.0M
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
62
Summarization
65
vs
83
Q&A
0
vs
82
Extraction
73
vs
86
Reasoning
91
vs
58
Classification
0
vs
88
Creative Writing
61
vs
52
Claude Opus 5
Gemini 3 Flash
Guidance
When to use Claude Opus 5 vs Gemini 3 Flash
Choose Claude Opus 5 when...
- -You need strong reasoning (confidence 91 vs 58)
- -You need strong code generation (confidence 72 vs 65)
- -You need strong creative writing (confidence 61 vs 52)
Choose Gemini 3 Flash when...
- -You need strong extraction (confidence 86 vs 73)
- -You need strong summarization (confidence 83 vs 65)
- -Cost matters: 90% cheaper on input tokens
- -You need a larger context window (1.0M vs 1M)
At scale
Cost at scale
Estimated cost assuming a seventy percent input and thirty percent output token split.
Claude Opus 5
Gemini 3 Flash
100K tokens
$1.10
$0.13Cheaper
1M tokens
$11.00
$1.25Cheaper
10M tokens
$110.00
$12.50Cheaper
FAQ
When should I use Claude Opus 5 instead of Gemini 3 Flash?
Claude Opus 5 outperforms Gemini 3 Flash for Code Generation, Reasoning, Creative Writing. It costs $5.00/$25.00 per million tokens (input/output).
Is Gemini 3 Flash cheaper than Claude Opus 5?
Yes. Gemini 3 Flash input costs $0.50/MTok vs $5.00/MTok for Claude Opus 5, saving 90% on input.
What are the context window sizes for Claude Opus 5 and Gemini 3 Flash?
Claude Opus 5 has a 1M token context window. Gemini 3 Flash has a 1.0M 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 Gemini 3 Flash 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.