tokevenClaudevsGemini
Claude Opus 5 vs Gemini 3.5 Flash
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
Claude Opus 5
FlagshipGemini 3.5 Flash
Fast / BudgetInput $/MTok
$5.00
$1.50
Output $/MTok
$25.00
$9.00
Cache discount
90% off
90% off
Context
1,000K
1,000K
Quality
Task confidence comparison
Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
0
vs
68
Code Review
0
vs
65
Summarization
0
vs
85
Q&A
0
vs
84
Extraction
0
vs
90
Reasoning
0
vs
60
Classification
0
vs
92
Creative Writing
0
vs
55
Claude Opus 5
Gemini 3.5 Flash
Guidance
When to use Claude Opus 5 vs Gemini 3.5 Flash
Choose Claude Opus 5 when...
- Similar performance; consider provider preference or ecosystem fit.
Choose Gemini 3.5 Flash when...
- -Cost matters: 70% 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
Gemini 3.5 Flash
100K tokens
$1.10
$0.38Cheaper
1M tokens
$11.00
$3.75Cheaper
10M tokens
$110.00
$37.50Cheaper
FAQ
When should I use Claude Opus 5 instead of Gemini 3.5 Flash?
Claude Opus 5 and Gemini 3.5 Flash perform similarly across all tracked tasks. Pick based on pricing and provider preference.
Is Gemini 3.5 Flash cheaper than Claude Opus 5?
Yes. Gemini 3.5 Flash input costs $1.50/MTok vs $5.00/MTok for Claude Opus 5, saving 70% on input.
What are the context window sizes for Claude Opus 5 and Gemini 3.5 Flash?
Claude Opus 5 has a 1,000K token context window. Gemini 3.5 Flash has a 1,000K 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 3.5 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.