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Gemini 3 Pro Preview

Google · Gemini 3

Deprecated Gemini 3 preview model retained as migration and historical context after its March 9, 2026 shutdown.

Part of Gemini Pro family · Other versions: Gemini 3.1 Pro Preview , Gemini 2.5 Pro TTS Preview , Computer Use Preview , Gemini 2.5 Pro
Type
multimodal
Context
1M tokens
Max Output
66K tokens
Status
deprecated
Input
$2/1M tok
Output
$12/1M tok
API Access
Yes
License
proprietary
multimodal reasoning long-context tool-use video-understanding agentic
Released November 2025 · Updated April 13, 2026

Overview

Freshness note: Model capabilities, limits, and pricing can change quickly. This profile is a point-in-time snapshot last verified on April 13, 2026.

Gemini 3 Pro Preview was Google’s initial Gemini 3 preview model for advanced multimodal, agentic, and long-context reasoning. As of April 13, 2026, Google’s official models page still lists Gemini 3 Pro Preview as shut down on March 9, 2026, with migration directed to Gemini 3.1 Pro Preview.

Within Google’s lineup, Pro Preview was the quality-first option, while Flash models remained tuned for lower latency and lower cost at scale.

Capabilities

Gemini 3 Pro Preview was strongest in:

  • Long-context reasoning over large documents and mixed evidence
  • Multimodal understanding across text, image, audio, and video workflows.
  • Tool-enabled agent use cases where planning and iterative execution are required.
  • Complex summarization and synthesis tasks with tight instruction constraints.
  • Enterprise copilots that need broad capability coverage in a single endpoint.

Its 1M-token context window is especially useful for legal review, policy analysis, and cross-document technical investigations.

Technical Details

Google’s current models page preserves Gemini 3 Pro Preview as a shut-down previous model and documents the migration path to Gemini 3.1 Pro Preview. Historical reference points include:

  • 1,048,576 token context window
  • 65,536 max output tokens
  • Multimodal input support including text, images, audio, video, and PDF
  • A March 9, 2026 shutdown date in current Google docs

For production teams, the implication is clear: migrate to Gemini 3.1 Pro Preview or a stable Gemini 2.5 tier immediately, and keep explicit fallback models in place.

Pricing & Access

Historical API pricing (<=200K input tokens, per 1M tokens) remained:

  • Input: $2.00
  • Output: $12.00

Higher rates applied above 200K input tokens. The practical action is not to start new work here, but to migrate any pinned traffic to Gemini 3.1 Pro Preview or a stable 2.5 tier.

This page now functions primarily as migration and historical context.

Best Use Cases

Use this page as a historical reference when you need:

  • Historical comparison against Gemini 3.1 Pro Preview
  • A reference point for earlier Gemini 3 preview pricing and capability assumptions.
  • Migration planning for systems still pinned to the deprecated preview.

For active deployments, route new work to Gemini 3.1 Pro Preview or Gemini 2.5 Pro instead.

Comparisons

  • Gemini 3.1 Pro Preview (Google): Direct migration target in Google’s current docs.
  • Gemini 2.5 Pro (Google): Stable fallback for teams that want to leave the preview lifecycle entirely.
  • Claude Opus (Anthropic): Premium alternative for instruction-heavy enterprise reasoning if you are reassessing provider choice during migration.