Model Comparison

Gemini 3.1 Pro vs Gemini 3 ProWhich is better in 2026?

Gemini 3.1 Pro significantly outperforms across most benchmarks. Gemini 3 Pro is 1.3x cheaper per token.

Verdict: Gemini 3.1 Pro vs Gemini 3 Pro — which is better?

Gemini 3.1 Pro (by Google) and Gemini 3 Pro (by Google) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

Gemini 3.1 Pro outperforms in 8 benchmarks (ARC-AGI v2, GPQA, Humanity's Last Exam, LiveCodeBench Pro, MMMLU, SWE-Bench Verified, t2-bench, Terminal-Bench 2.0), while Gemini 3 Pro is better at 1 benchmark (MMMU-Pro). Gemini 3.1 Pro significantly outperforms across most benchmarks.

On price, Gemini 3 Pro is roughly 1.3x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Choose Gemini 3.1 Pro if…

  • you want the strongest raw capability — it leads on 8 of 10 shared benchmarks
  • you want the most recent training data — it shipped Feb 2026

Choose Gemini 3 Pro if…

  • cost matters — it's about 1.3x cheaper per token
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Performance Benchmarks

Comparative analysis across standard metrics

10 benchmarks

Gemini 3.1 Pro outperforms in 8 benchmarks (ARC-AGI v2, GPQA, Humanity's Last Exam, LiveCodeBench Pro, MMMLU, SWE-Bench Verified, t2-bench, Terminal-Bench 2.0), while Gemini 3 Pro is better at 1 benchmark (MMMU-Pro).

Gemini 3.1 Pro significantly outperforms across most benchmarks.

Sat Jun 06 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Gemini 3 Pro costs less

For input processing, Gemini 3.1 Pro ($2.50/1M tokens) is 1.3x more expensive than Gemini 3 Pro ($2.00/1M tokens).

For output processing, Gemini 3.1 Pro ($15.00/1M tokens) is 1.3x more expensive than Gemini 3 Pro ($12.00/1M tokens).

In conclusion, Gemini 3.1 Pro is more expensive than Gemini 3 Pro.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Sat Jun 06 2026 • llm-stats.com
Google
Gemini 3.1 Pro
Input tokens$2.50
Output tokens$15.00
Best providerGoogle
Google
Gemini 3 Pro
Input tokens$2.00
Output tokens$12.00
Best providerGoogle
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Both models have the same input context window of 1,048,576 tokens. Both models can generate responses up to 65,536 tokens.

Google
Gemini 3.1 Pro
Input1,048,576 tokens
Output65,536 tokens
Google
Gemini 3 Pro
Input1,048,576 tokens
Output65,536 tokens
Sat Jun 06 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Gemini 3.1 Pro and Gemini 3 Pro support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Gemini 3.1 Pro

Text
Images
Audio
Video

Gemini 3 Pro

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Gemini 3.1 Pro

Proprietary

Closed source

Gemini 3 Pro

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 3.1 Pro was released on 2026-02-19, while Gemini 3 Pro was released on 2025-11-18.

Gemini 3.1 Pro is 3 months newer than Gemini 3 Pro.

Gemini 3.1 Pro

Feb 19, 2026

3 months ago

3mo newer
Gemini 3 Pro

Nov 18, 2025

6 months ago

Knowledge Cutoff

When training data ends

Both models have the same knowledge cutoff date of 2025-01-31.

They should have similar awareness of historical events and information up to this date.

Gemini 3.1 Pro

Jan 2025

Gemini 3 Pro

Jan 2025

Provider Availability

Gemini 3.1 Pro is available from Google. Gemini 3 Pro is available from Google.

Gemini 3.1 Pro

google logo
Google
Input Price:Input: $2.50/1MOutput Price:Output: $15.00/1M

Gemini 3 Pro

google logo
Google
Input Price:Input: $2.00/1MOutput Price:Output: $12.00/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

Google
Higher ARC-AGI v2 score (77.1% vs 31.1%)
Higher GPQA score (94.3% vs 91.9%)
Higher Humanity's Last Exam score (51.4% vs 45.8%)
Higher LiveCodeBench Pro score (96.2% vs 81.3%)
Higher MMMLU score (92.6% vs 91.8%)
Higher SWE-Bench Verified score (80.6% vs 76.2%)
Higher t2-bench score (99.3% vs 85.4%)
Higher Terminal-Bench 2.0 score (68.5% vs 54.2%)
Google
Less expensive input tokens
Less expensive output tokens
Higher MMMU-Pro score (81.0% vs 80.5%)

Detailed Comparison

AI Model Comparison Table
Feature
Google
Gemini 3.1 Pro
Google
Gemini 3 Pro

FAQ

Common questions about Gemini 3.1 Pro vs Gemini 3 Pro.

Which is better, Gemini 3.1 Pro or Gemini 3 Pro?

Gemini 3.1 Pro significantly outperforms across most benchmarks. Gemini 3.1 Pro is made by Google and Gemini 3 Pro is made by Google. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Gemini 3.1 Pro compare to Gemini 3 Pro in benchmarks?

Gemini 3.1 Pro scores t2-bench: 99.3%, LiveCodeBench Pro: 96.2%, GPQA: 94.3%, MMMLU: 92.6%, BrowseComp: 85.9%. Gemini 3 Pro scores AIME 2025: 100.0%, Vending-Bench 2: 100.0%, Global PIQA: 93.4%, GPQA: 91.9%, MMMLU: 91.8%.

Is Gemini 3.1 Pro cheaper than Gemini 3 Pro?

Gemini 3 Pro is 1.3x cheaper for input tokens. Gemini 3.1 Pro costs $2.50/M input and $15.00/M output via google. Gemini 3 Pro costs $2.00/M input and $12.00/M output via google.

What are the context window sizes for Gemini 3.1 Pro and Gemini 3 Pro?

Gemini 3.1 Pro supports 1.0M tokens and Gemini 3 Pro supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Gemini 3.1 Pro and Gemini 3 Pro?

Key differences include input pricing ($2.50 vs $2.00/M). See the full comparison above for benchmark-by-benchmark results.

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