Gemini 3.5 Flash — API Pricing & Benchmarks
Gemini 3.5 Flash is Google's previous-generation reasoning model, released in 2026-05. The API costs $1.50 per 1M input tokens and $9.00 per 1M output tokens ($3.38 blended at a 3:1 ratio), with cached input at $0.15. It supports a 1.0M-token context window. On the independently measured Artificial Analysis Intelligence Index it scores 52, ranking #27 of 68 models tracked on this site, with a median output speed of 251 tokens/sec.
Explore provider routes and additional benchmark sources for Gemini 3.5 Flash
| Provider | |
| Input price / 1M tokens | $1.50 |
| Output price / 1M tokens | $9.00 |
| Cached input / 1M tokens | $0.15 |
| Blended price (3:1) | $3.38 |
| Context window | 1.0M |
| Max output tokens | 66K |
| Knowledge cutoff | 2025-01 |
| License | proprietary |
| Input modalities | T+I+A+V |
| Output speed (tok/s) | 251 |
| Released | 2026-05 |
| Artificial Analysis Intelligence Index | 52 |
| LMArena Elo | 1484 |
| GPQA Diamond | 92.2% |
| SWE-bench Verified | 79.3% |
| Humanity's Last Exam | 42.7% |
| MMMU | 81.2% |
Where Gemini 3.5 Flash fits
On a blended 3:1 basis Gemini 3.5 Flash costs $3.38 per 1M tokens, cheaper than 33% of the 80 priced models in this index. It is a previous-generation model: usually only worth choosing if you have an existing integration, negotiated pricing, or need its specific behavior, since newer siblings offer better price-performance. Measured output speed of 251 tokens/sec is well above the index median of 104, making it suitable for interactive, user-facing use. Cached input is priced at $0.15 (90% below standard input), which rewards prompt structures with long stable prefixes — see our caching guide.
Price history
| Period | Input $/1M | Output $/1M | Cached $/1M |
|---|---|---|---|
| 2026-07-18 → current | $1.50 | $9.00 | $0.15 |
No list-price changes recorded since tracking began. Full dataset: price-history.json (CC BY 4.0).
Alternatives at a similar price
- Gemini 2.5 Pro (Google) — $3.44/1M blended, AA Index 25.9
- Nova 2 Pro (preview) (Amazon) — $3.44/1M blended, AA Index 22.1
- GPT-4.1 (OpenAI) — $3.50/1M blended, AA Index 19.6
- Qwen3.7-Max (Alibaba Qwen) — $3.75/1M blended, AA Index 46.7
About Google
Google's Gemini models are natively multimodal — most accept text, images, audio and video input — with 1M-token context windows across the range. The Flash line now ships on a roughly monthly cadence (3.6, 3.7, 3.8 Flash between July and September 2026) at the same introductory price, competing on price-performance and speed rather than peak capability.