Claude Sonnet 5 vs Gemini 3.8 Flash
Price, context window & benchmark comparison
VS
Compare different models
Verdict: Gemini 3.8 Flash is 2.7× cheaper than Claude Sonnet 5 on a typical 3:1 input/output mix. Gemini 3.8 Flash scores higher on the Artificial Analysis Intelligence Index (40.9 vs 38.2). Gemini 3.8 Flash has the larger context window (1M vs 1M).
| Claude Sonnet 5 | Gemini 3.8 Flash | |
|---|---|---|
| Input price / 1M | $2.00 | $0.75 |
| Output price / 1M | $10.00 | $3.75 |
| Blended price (3:1) | $4.00 | $1.50 |
| Cached input / 1M | $0.20 | $0.075 |
| Context window | 1M | 1M |
| Max output | 128K | 66K |
| Intelligence index | 38.2 | 40.9 |
| Coding index | 71.5 | 76.3 |
| Providers | 10 | 6 |
| Best provider uptime (30m) | 100.0% | 100.0% |
| Vision input | Yes | Yes |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| Released | 2026-06-30 | 2026-09-02 |
| Retirement | — | — |
Cost calculator
FAQ
Which is cheaper, Claude Sonnet 5 or Gemini 3.8 Flash?
Gemini 3.8 Flash is 2.7× cheaper than Claude Sonnet 5 on a typical 3:1 input/output mix.
Claude Sonnet 5 vs Gemini 3.8 Flash: which has a bigger context window?
Claude Sonnet 5: 1,000,000 tokens. Gemini 3.8 Flash: 1,048,576 tokens.
How much would 1 million requests cost?
At 2,000 input + 500 output tokens per request: Claude Sonnet 5 ≈ $9,000, Gemini 3.8 Flash ≈ $3,375.
More comparisons
Claude Sonnet 5 vs GLM 5.3 PrimeClaude Sonnet 5 vs Qwen3.8 Max PrimeClaude Sonnet 5 vs Command A+Claude Sonnet 5 vs GPT-6 Luna ProClaude Sonnet 5 vs GPT-6 LunaClaude Sonnet 5 vs GPT-6 Sol ProClaude Sonnet 5 vs GPT-6 SolClaude Sonnet 5 vs Claude Opus 5.5Claude Sonnet 5 vs MiMo-V2.6-Pro-UltraSpeedClaude Sonnet 5 vs MiMo-V2.6-FlashClaude Sonnet 5 vs Grok 4.7Claude Sonnet 5 vs Qwen3.8 Omni FlashClaude Sonnet 5 vs GLM 5.3 FlashXClaude Sonnet 5 vs DeepSeek V4.1 FlashClaude Sonnet 5 vs GPT-6 AstraClaude Sonnet 5 vs GPT-6 Astra ProGemini 3.8 Flash vs GLM 5.3 PrimeGemini 3.8 Flash vs Qwen3.8 Max PrimeGemini 3.8 Flash vs Command A+Gemini 3.8 Flash vs GPT-6 Luna ProGemini 3.8 Flash vs GPT-6 LunaGemini 3.8 Flash vs GPT-6 Sol ProGemini 3.8 Flash vs GPT-6 SolGemini 3.8 Flash vs Claude Opus 5.5