Gemini 3.5 Flash
google/gemini-3.5-flash
Gemini 3.5 Flash is Google's high-efficiency multimodal model, bringing near-Pro level coding and reasoning at Flash-tier cost and speed.
Key facts
- Input price
- $1.50 / 1M tokens
- Output price
- $9.00 / 1M tokens
- Context window
- 1M tokens
- Max output
- 66K tokens
- Accepts
- Text, Images, Files, Audio, Video
- Returns
- Text
Example: 1,000 requests with 1,000 input and 500 output tokens each would cost about $6.00 (1M input tokens × $1.50 + 0.5M output tokens × $9.00). Estimate your own usage.
Prices are the provider’s own per-token rates with zero markup, from our price list as of Oct 18, 2026. If a call has extra provider charges (images, audio, web search, cached prompts), you pay the reported cost.
Call it from your code
curl https://api.tokenctr.com/v1/chat/completions \
-H "Authorization: Bearer $TOKENCENTER_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model": "google/gemini-3.5-flash", "messages": [{"role": "user", "content": "Hello!"}]}'Works with any OpenAI-compatible SDK: set the base URL to https://api.tokenctr.com/v1. Quickstart
Benchmarks
Artificial Analysis
- Intelligence index
- 33.6
Design Arena
| Category | Rank | Elo | Win rate |
|---|---|---|---|
| Agents: Agentic slides (python-pptx) | 2 | 1242 | 57.8% |
| Agents: PPTX slides | 2 | 1244 | 57.7% |
| Agents: Agentic slides | 3 | 1244 | 57.5% |
| Agents: Agentic HTML slides | 6 | 1162 | 45.8% |
| Agents: Agentic slides (HTML) | 6 | 1162 | 45.7% |
| Agents: Slides (python-pptx) | 9 | 1247 | 57.4% |
| Agents: Agentic game dev | 13 | 1180 | 55.4% |
| Models: SVG | 13 | 1252 | 58.3% |
| Agents: Android native | 14 | 1199 | 57.7% |
| Models: ASCII art | 16 | 1256 | 58.9% |
| Agents: Full-stack | 18 | 1197 | 56.2% |
| Agents: HTML slides | 19 | 1142 | 46.5% |
| Agents: Web apps | 20 | 1196 | 52.6% |
| Agents: Mobile apps | 21 | 1173 | 51.2% |
| Models: Game dev | 27 | 1267 | 53% |
| Models: UI components | 29 | 1272 | 54.5% |
| Agents: Godot game dev | 30 | 1098 | 43% |
| Models: Websites | 30 | 1269 | 53.7% |
| Models: Code | 31 | 1268 | 54.1% |
| Models: 3D | 34 | 1244 | 55.9% |
| Models: Data visualization | 38 | 1237 | 53% |
Source: Artificial Analysis indexes and Design Arena results as published in OpenRouter’s model data, fetched Oct 15, 2026. Higher is better. Not measured by TokenCenter. See all rankings.