Free Gemini 3.8 Flash API

Updated 9/25/2026

Google's frontier ultra-fast multimodal model (September 2026 release) with 1M context, 291 tok/s, and state-of-the-art agentic coding performance.

About the Model

为什么选择 Gemini 3.8 Flash？

Gemini 3.8 Flash 是 Google 在 2026 年 9 月推出的全新一代高能效比多模态旗舰大模型。专为长程自主编程、多步骤 Agent 工具调用与高吞吐生产环境打造。在权威 Artificial Analysis 综合智能指数评测中斩获 41 分的高分，位居同价位及免费梯队榜首，大幅超越 DeepSeek V4.1 Flash、GPT-5.6 Luna 与 Qwen3.8。

核心优势与能力

  • 顶尖能效与极速吞吐：生成速度突破 291 tokens/s，首字响应时间亚秒级，为 Cursor、Claude Code、Codex 等主流 Coding Agent 提供零停滞的交互式编码体验。
  • 100 万 Token 原生上下文：支持单次完整喂入整座后端代码仓库、完整构建日志与超大 API 规格文档，保持长程代码结构连贯不遗忘。
  • 原生端到端全模态理解：原生直接处理文本、高清图像架构图以及音频输入，省去级联 STT 转写链路带来的延迟和语义失真。
  • Agent 原生工具链自省优化：强化复杂多步 Function Calling、结构化 JSON 输出与代码执行错误自我纠错能力，自主修复 Bug 成功率显著提高。

免费依据与使用机制

长期免绑卡开发者政策：通过 Google AI Studio 官方开发者平台，个人开发者可直接获取专属 API Key。在免费套餐（Free of charge）下，Google 官方提供稳定的基础调用配额（每日高达 1500 次请求，每分钟 15 次请求），完全无需绑定境外信用卡，也不存在隐藏扣费。

Try it in your browser

Pick a model, paste your own free key, and run. Your key is sent once to call the provider and never stored on our servers.

Pick a model, paste your own free key, and run. Your key is sent once to call the provider and never stored on our servers.

How to call Gemini 3.8 Flash

curl https://generativelanguage.googleapis.com/v1beta/openai/chat/completions \
  -H "Authorization: Bearer $GEMINI_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gemini-3.8-flash",
    "messages": [
      {"role": "system", "content": "You are a helpful coding assistant."},
      {"role": "user", "content": "Write a TypeScript function to debounce an async callback."}
    ],
    "temperature": 0.7
  }'

Provider Details

The following platforms provide free access to Gemini 3.8 Flash through free tiers, trial credits, or daily quotas.

ProviderContext WindowFree QuotaRequires CCRatingAction
Google AI Studio1049KRate Limit
15 requests per minute
No
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