tokevenClaudevsGemini
Claude Sonnet 5 vs Gemini 2.5 Flash
Side-by-side comparison of pricing, task quality, and projected cost at higher scale.
Pricing
Side-by-side pricing
Claude Sonnet 5
Mid-tierGemini 2.5 Flash
Fast / BudgetInput $/MTok
$2.00
$0.30
Output $/MTok
$10.00
$2.50
Cache discount
90% off
90% off
Context
1,000K
1,048.576K
Quality
Task confidence comparison
Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
93
vs
0
Code Review
96
vs
0
Summarization
91
vs
0
Q&A
89
vs
0
Extraction
88
vs
0
Reasoning
90
vs
0
Classification
86
vs
0
Creative Writing
87
vs
0
Claude Sonnet 5
Gemini 2.5 Flash
Guidance
When to use Claude Sonnet 5 vs Gemini 2.5 Flash
Choose Claude Sonnet 5 when...
- Similar performance; consider provider preference or ecosystem fit.
Choose Gemini 2.5 Flash when...
- -Cost matters: 85% cheaper on input tokens
- -You need a larger context window (1,048.576K vs 1,000K)
At scale
Cost at scale
Estimated cost assuming a seventy percent input and thirty percent output token split.
Claude Sonnet 5
Gemini 2.5 Flash
100K tokens
$0.44
$0.10Cheaper
1M tokens
$4.40
$0.96Cheaper
10M tokens
$44.00
$9.60Cheaper
FAQ
When should I use Claude Sonnet 5 instead of Gemini 2.5 Flash?
Claude Sonnet 5 and Gemini 2.5 Flash perform similarly across all tracked tasks. Pick based on pricing and provider preference.
Is Gemini 2.5 Flash cheaper than Claude Sonnet 5?
Yes. Gemini 2.5 Flash input costs $0.30/MTok vs $2.00/MTok for Claude Sonnet 5, saving 85% on input.
What are the context window sizes for Claude Sonnet 5 and Gemini 2.5 Flash?
Claude Sonnet 5 has a 1,000K token context window. Gemini 2.5 Flash has a 1,048.576K 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 Sonnet 5 and Gemini 2.5 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.