Claude Sonnet 4 vs Gemini 3.5 Flash
Side-by-side comparison of Anthropic's Claude Sonnet 4 and Google's Gemini 3.5 Flash. Which one is right for you?
Benchmark Comparison
Coding
Claude Sonnet 4 wins92
82
Reasoning
Claude Sonnet 4 wins90
85
Multimodal
Gemini 3.5 Flash wins85
90
Speed
Gemini 3.5 Flash wins88
98
Overall
Claude Sonnet 4 wins89
88
Pricing Comparison
Claude Sonnet 4
API Input$3.00/1M
API Output$15.00/1M
Subscription$20/mo
Free tierYes
Gemini 3.5 Flash
API Input$0.15/1M
API Output$0.60/1M
Subscription$20/mo
Free tierYes
Specifications
| Spec | Claude Sonnet 4 | Gemini 3.5 Flash |
|---|---|---|
| Provider | Anthropic | |
| Released | 2026-01 | 2026-05 |
| Category | Frontier | Budget |
| Context Window | 200K | 1M |
| Open Source | No | No |
| Multimodal | Yes | Yes |
| Best For | Balanced performance, Everyday coding, Writing | Speed, Cost efficiency, High volume |
Claude Sonnet 4
Good balance of speed and quality
Competitive pricing
Reliable
Not the best at any single task
Smaller multimodal capabilities
Gemini 3.5 Flash
Fastest major model
Cheapest API
Good enough for most tasks
Not as strong on complex reasoning
Less capable than Pro