Ann NgAnn Ng
5 min read

How to use Deep Research Preview (Apr-21-2026) from Google with API Key on TypingMind

Learn how to access and use Deep Research Preview (Apr-21-2026) with your Google API key through TypingMind. Get started with this powerful AI model in minutes.

Google Gemini is Google DeepMind's advanced multimodal AI platform designed for the "agentic era," with the latest Gemini 2.5 family of models released in 2025 featuring breakthrough thinking and reasoning capabilities.

The current lineup includes Gemini 2.5 Deep Think (most advanced reasoning model using parallel multi-agent reasoning for complex math and coding), Gemini 2.5 Pro (flagship thinking model with enhanced performance and 1M token context window), Gemini 2.5 Flash (fastest thinking model balancing speed and intelligence), and Gemini 2.5 Flash-Lite (optimized for cost-effective deployment).

Key features include native tool use, multimodal understanding (text, images, audio, video), code execution integration, Google Search connectivity, reinforcement learning-enhanced reasoning, and the ability to think through responses before answering for improved accuracy.

Official Documentation: https://ai.google.dev/gemini-api/docs/models

Deep Research Preview (Apr-21-2026) Overview

Model NameDeep Research Preview (Apr-21-2026)
ProviderGoogle
Model IDdeep-research-preview-04-2026
Release DateApr 21, 2026
Last UpdatedApr 21, 2026
Knowledge Cutoff2025-01
Context Window131,072 tokens
Max Output65,536 tokens
Pricing /1M tokens$2 input
$12 output
$0.2 cache read
Input Modalitiestext, image, video, audio, pdf
Output Modalitiestext, image
Capabilities
File UploadReasoningTool CallingTemperature Control

Complete Setup Guide

1

Get Your Google API Key

First, you'll need to obtain an API key from Google. This key allows you to access their AI models directly and pay only for what you use.

  1. Visit Google's API console
  2. Sign up or log in to your account
  3. Navigate to the API keys section
  4. Generate a new API key (copy it immediately as some providers only show it once)
  5. Save your API key in a secure password manager or encrypted note

⚠️ Important: Keep your API key secure and never share it publicly. Store it safely as you'll need it to connect with TypingMind.

2

Configure TypingMind with Google API Key

  1. Open TypingMind in your browser
  2. Click the "Settings" icon (gear symbol)
  3. Navigate to "Models" section
  4. Click "Add Custom Model"
  5. Fill in the model information:
    Name: deep-research-preview-04-2026 via Google (or your preferred name)
    Endpoint: https://generativelanguage.googleapis.com/v1beta/models
    Model ID: deep-research-preview-04-2026
    Context Length: Enter the model's context window (e.g., 131072 for deep-research-preview-04-2026)
    Google Endpoint URL input fielddeep-research-preview-04-2026https://generativelanguage.googleapis.com/v1beta/modelsdeep-research-preview-04-2026 via Googlehttps://www.typingmind.com/model-logo.webp131072
  6. Add custom headers by clicking "Add Custom Headers" in the Advanced Settings section:
    x-goog-api-key: <GEMINI_API_KEY>:
    X-Title: typingmind.com
    HTTP-Referer: https://www.typingmind.com
  7. Enable "Support Plugins (via OpenAI Functions)" if the model supports the "functions" or "tool_calls" parameter, or enable "Support OpenAI Vision" if the model supports vision.
  8. Click "Test" to verify the configuration
  9. If you see "Nice, the endpoint is working!", click "Add Model"
3

Start chatting with Deep Research Preview (Apr-21-2026)

Now you can start chatting with Deep Research Preview (Apr-21-2026) through TypingMind:

  • Select Deep Research Preview (Apr-21-2026) from the model dropdown menu
  • Start typing your message in the chat input
  • Enjoy faster responses and better features than the official interface
  • Switch between different AI models as needed
The best frontend AI chat for deep-research-preview-04-2026 via OpenRouter API KeyThe best frontend AI chat for deep-research-preview-04-2026 via OpenRouter API Keydeep-research-preview-04-2026The best frontend AI chat for deep-research-preview-04-2026 via OpenRouter API Key

💡 Pro tips for better results:

Frequently Asked Questions

Do I need a subscription to use Deep Research Preview (Apr-21-2026)?

No! With Google API, you pay only for what you use with no monthly subscription. Add credits to your Google account and pay as you go. TypingMind is also a one-time purchase, not a subscription.

How much will it cost to use Deep Research Preview (Apr-21-2026)?

Deep Research Preview (Apr-21-2026) costs $2/1M input tokens and $12/1M output tokens. A typical conversation might cost $0.01-0.10 depending on length.

Can I use other models besides Deep Research Preview (Apr-21-2026)?

Yes! With Google API + TypingMind, you can access all Google models. Switch between them instantly in TypingMind.

Is my data private and secure?

Yes! TypingMind stores conversations locally (web version in browser, desktop version on your device). Google handles API calls securely. Check Google's data policy for specifics.

Can I use Deep Research Preview (Apr-21-2026) for commercial projects?

Yes! Check Google's terms of service for specific commercial use policies. TypingMind supports commercial use.