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ClaudevsGemini

Claude Sonnet 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 Sonnet 5

Mid-tier

Gemini 3.5 Flash

Fast / Budget
Input $/MTok
$2.00
$1.50
Output $/MTok
$10.00
$9.00
Cache discount
90% off
75% off
Context
200K
1,000K

Quality

Task confidence comparison

Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
93
vs
68
Code Review
96
vs
65
Summarization
91
vs
85
Q&A
89
vs
84
Extraction
88
vs
90
Reasoning
90
vs
60
Classification
86
vs
92
Creative Writing
87
vs
55
Claude Sonnet 5
Gemini 3.5 Flash

Guidance

When to use Claude Sonnet 5 vs Gemini 3.5 Flash

Choose Claude Sonnet 5 when...

  • -You need strong code review (confidence 96 vs 65)
  • -You need strong code generation (confidence 93 vs 68)
  • -You need strong summarization (confidence 91 vs 85)
  • -You need strong reasoning (confidence 90 vs 60)

Choose Gemini 3.5 Flash when...

  • -You need strong classification (confidence 92 vs 86)
  • -You need strong extraction (confidence 90 vs 88)
  • -Cost matters: 25% cheaper on input tokens
  • -You need a larger context window (1,000K vs 200K)

At scale

Cost at scale

Estimated cost assuming a seventy percent input and thirty percent output token split.
Claude Sonnet 5
Gemini 3.5 Flash
100K tokens
$0.44
$0.38Cheaper
1M tokens
$4.40
$3.75Cheaper
10M tokens
$44.00
$37.50Cheaper

FAQ

When should I use Claude Sonnet 5 instead of Gemini 3.5 Flash?

Claude Sonnet 5 outperforms Gemini 3.5 Flash for Code Generation, Code Review, Reasoning. It costs $2.00/$10.00 per million tokens (input/output).

Is Gemini 3.5 Flash cheaper than Claude Sonnet 5?

Yes. Gemini 3.5 Flash input costs $1.50/MTok vs $2.00/MTok for Claude Sonnet 5, saving 25% on input.

What are the context window sizes for Claude Sonnet 5 and Gemini 3.5 Flash?

Claude Sonnet 5 has a 200K token context window. Gemini 3.5 Flash has a 1,000K token context window.

Track your real costs

Comparisons show estimated costs at list price. The dashboard reveals your real spend and savings.

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