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GoogleReleased 2026-03-15

Gemini 3.1 Pro

Gemini 3.1 Pro is Google's pro-tier model with a 2M token context window — the largest among major commercial models. $2/$12 per 1M tokens under 200K context, $4/$18 for larger. Best for research and long-document analysis.

Context
2M tokens
Input
$2/1M
Output
$12/1M
Modalities
textimageaudiovideo
💡 Under 200K context. >200K: $4/$18.

Best For

Huge context windowsResearchDocument analysisVideo understanding

Strengths

  • Largest context window among commercial models (2M)
  • Native multimodal (text + image + audio + video)
  • Strong at research and synthesis
  • Built-in Google Search integration
  • Google Workspace integration (Docs, Sheets, Gmail)

Weaknesses

  • Pro tier free tier removed April 1, 2026
  • More expensive than Flash
  • Google-only data privacy concerns
  • Slower than Flash variants

Related Alternatives

Gemini 3.6 Flash

Multimodal at 1/4 price, 1M context

Claude Opus 4.8

Better for code, similar pricing

Frequently Asked Questions

How much does Gemini 3.1 Pro cost?

Gemini 3.1 Pro costs $2 per 1M input and $12 per 1M output for prompts under 200K tokens. Above 200K, it doubles to $4/$18 per 1M. Google AI Pro subscription is $19.99/month.

What is the largest context window available?

Gemini 3.1 Pro has the largest at 2 million tokens. GPT-5.6 and Claude Opus 4.8 both offer 1M. For most use cases, 1M is enough; 2M is helpful for very long documents (full codebases, large books).

See Gemini 3.1 Pro's full record in our database

Live pricing for all Google plans, token cost calculator, and the latest price changes.

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