AI models / Compare
Claude Sonnet 5.5 vs Gemini 3.8 Flash
Claude Sonnet 5.5: Anthropic's balance of speed and intelligence. Gemini 3.8 Flash: Google's most capable Flash model, for long-horizon software engineering and agents.
| Spec | Claude Sonnet 5.5 | Gemini 3.8 Flash |
|---|---|---|
| Provider | Anthropic | |
| API model ID | claude-sonnet-5-5 | gemini-3.8-flash |
| API price (standard) | $2.00 in / $10.00 out per 1M tokens | $0.75 in / $3.75 out per 1M tokens |
| Pricing note | Batch API is 50% off. | Through Dec 31, 2026; $1.50 in / $7.50 out from Jan 1, 2027. Free tier available. |
| Context window | 1M tokens | Not stated |
| Max output | 128K tokens | Not stated |
| Weights | Closed (API only) | Closed (API only) |
Figures from each provider's official docs, checked 2026-10-15. Benchmarks and real-world quality vary by task, so test both on your own prompts.