Gemini 3.1 Pro vs GPT-4o Comparison

Comparing Gemini 3.1 Pro and GPT-4o across benchmarks, pricing, and capabilities.

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Performance Benchmarks

Comparative analysis across standard metrics

5 benchmarks

Gemini 3.1 Pro outperforms in 5 benchmarks (GPQA, Humanity's Last Exam, MMMLU, MMMU-Pro, SWE-Bench Verified), while GPT-4o is better at 0 benchmarks.

Gemini 3.1 Pro significantly outperforms across most benchmarks.

Tue Mar 17 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

GPT-4o costs less

For input processing, Gemini 3.1 Pro ($2.50/1M tokens) costs the same as GPT-4o ($2.50/1M tokens).

For output processing, Gemini 3.1 Pro ($15.00/1M tokens) is 1.5x more expensive than GPT-4o ($10.00/1M tokens).

In conclusion, Gemini 3.1 Pro is more expensive than GPT-4o.*

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

Lowest available price from all providers

Tue Mar 17 2026 • llm-stats.com

Gemini 3.1 Pro

Input tokens$2.50

Output tokens$15.00

Best providerGoogle

GPT-4o

Input tokens$2.50

Output tokens$10.00

Best providerAzure

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Context Window

Maximum input and output token capacity

Gemini 3.1 Pro accepts 1,048,576 input tokens compared to GPT-4o's 128,000 tokens. Gemini 3.1 Pro can generate longer responses up to 65,536 tokens, while GPT-4o is limited to 16,384 tokens.

Gemini 3.1 Pro

Input1,048,576 tokens

Output65,536 tokens

GPT-4o

Input128,000 tokens

Output16,384 tokens

Tue Mar 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Gemini 3.1 Pro and GPT-4o 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

GPT-4o

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

GPT-4o

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 3.1 Pro was released on 2026-02-19, while GPT-4o was released on 2024-08-06.

Gemini 3.1 Pro is 19 months newer than GPT-4o.

Gemini 3.1 Pro

Feb 19, 2026

3 weeks ago

1.5yr newer

GPT-4o

Aug 6, 2024

1.6 years ago

Knowledge Cutoff

When training data ends

Gemini 3.1 Pro has a documented knowledge cutoff of 2025-01-31, while GPT-4o's cutoff date is not specified.

We can confirm Gemini 3.1 Pro's training data extends to 2025-01-31, but cannot make a direct comparison without GPT-4o's cutoff date.

Gemini 3.1 Pro

Jan 2025

GPT-4o

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Provider Availability

Gemini 3.1 Pro is available from Google. GPT-4o is available from Azure, OpenAI. The availability of providers can affect quality of the model and reliability.