Gemini 3.1 Pro vs GPT-5.1 High Comparison

Comparing Gemini 3.1 Pro and GPT-5.1 High across benchmarks, pricing, and capabilities.

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Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Gemini 3.1 Pro outperforms in 1 benchmarks (GPQA), while GPT-5.1 High is better at 0 benchmarks.

Gemini 3.1 Pro significantly outperforms across most benchmarks.

Mon Mar 16 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

GPT-5.1 High costs less

For input processing, Gemini 3.1 Pro ($2.50/1M tokens) is 2.0x more expensive than GPT-5.1 High ($1.25/1M tokens).

For output processing, Gemini 3.1 Pro ($15.00/1M tokens) is 1.5x more expensive than GPT-5.1 High ($10.00/1M tokens).

In conclusion, Gemini 3.1 Pro is more expensive than GPT-5.1 High.*

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

Lowest available price from all providers

Mon Mar 16 2026 • llm-stats.com

Gemini 3.1 Pro

Input tokens$2.50

Output tokens$15.00

Best providerGoogle

GPT-5.1 High

Input tokens$1.25

Output tokens$10.00

Best providerOpenAI

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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-5.1 High's 400,000 tokens. GPT-5.1 High can generate longer responses up to 128,000 tokens, while Gemini 3.1 Pro is limited to 65,536 tokens.

Gemini 3.1 Pro

Input1,048,576 tokens

Output65,536 tokens

GPT-5.1 High

Input400,000 tokens

Output128,000 tokens

Mon Mar 16 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Gemini 3.1 Pro and GPT-5.1 High 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-5.1 High

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-5.1 High

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 3.1 Pro was released on 2026-02-19, while GPT-5.1 High was released on 2025-11-12.

Gemini 3.1 Pro is 3 months newer than GPT-5.1 High.

Gemini 3.1 Pro

Feb 19, 2026

3 weeks ago

3mo newer

GPT-5.1 High

Nov 12, 2025

4 months ago

Knowledge Cutoff

When training data ends

Gemini 3.1 Pro has a documented knowledge cutoff of 2025-01-31, while GPT-5.1 High'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-5.1 High's cutoff date.

Gemini 3.1 Pro

Jan 2025

GPT-5.1 High

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Provider Availability

Gemini 3.1 Pro is available from Google. GPT-5.1 High is available from OpenAI. The availability of providers can affect quality of the model and reliability.