Gemini 3.1 Pro vs GPT-5.4 nano Comparison

Comparing Gemini 3.1 Pro and GPT-5.4 nano across benchmarks, pricing, and capabilities.

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Performance Benchmarks

Comparative analysis across standard metrics

7 benchmarks

Gemini 3.1 Pro outperforms in 6 benchmarks (GPQA, Humanity's Last Exam, MCP Atlas, MMMU-Pro, SWE-Bench Pro, Terminal-Bench 2.0), while GPT-5.4 nano is better at 1 benchmark (MRCR v2 (8-needle)).

Gemini 3.1 Pro significantly outperforms across most benchmarks.

Wed Mar 18 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

GPT-5.4 nano costs less

For input processing, Gemini 3.1 Pro ($2.50/1M tokens) is 12.5x more expensive than GPT-5.4 nano ($0.20/1M tokens).

For output processing, Gemini 3.1 Pro ($15.00/1M tokens) is 12.0x more expensive than GPT-5.4 nano ($1.25/1M tokens).

In conclusion, Gemini 3.1 Pro is more expensive than GPT-5.4 nano.*

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

Lowest available price from all providers
Wed Mar 18 2026 • llm-stats.com
Google
Gemini 3.1 Pro
Input tokens$2.50
Output tokens$15.00
Best providerGoogle
OpenAI
GPT-5.4 nano
Input tokens$0.20
Output tokens$1.25
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-5.4 nano's 400,000 tokens. GPT-5.4 nano can generate longer responses up to 128,000 tokens, while Gemini 3.1 Pro is limited to 65,536 tokens.

Google
Gemini 3.1 Pro
Input1,048,576 tokens
Output65,536 tokens
OpenAI
GPT-5.4 nano
Input400,000 tokens
Output128,000 tokens
Wed Mar 18 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Gemini 3.1 Pro and GPT-5.4 nano 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-5.4 nano

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-5.4 nano

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 3.1 Pro was released on 2026-02-19, while GPT-5.4 nano was released on 2026-03-17.

GPT-5.4 nano is 1 month newer than Gemini 3.1 Pro.

Gemini 3.1 Pro

Feb 19, 2026

3 weeks ago

GPT-5.4 nano

Mar 17, 2026

1 days ago

3w newer

Knowledge Cutoff

When training data ends

Gemini 3.1 Pro has a knowledge cutoff of 2025-01-31, while GPT-5.4 nano has a cutoff of 2025-08-31.

GPT-5.4 nano has more recent training data (up to 2025-08-31), making it potentially better informed about events through that date compared to Gemini 3.1 Pro (2025-01-31).

Gemini 3.1 Pro

Jan 2025

GPT-5.4 nano

Aug 2025

7 mo newer

Provider Availability

Gemini 3.1 Pro is available from Google. GPT-5.4 nano is available from OpenAI. The availability of providers can affect quality of the model and reliability.

Gemini 3.1 Pro

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

GPT-5.4 nano

openai logo
OpenAI
Input Price:Input: $0.20/1MOutput Price:Output: $1.25/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

Google
Larger context window (1,048,576 tokens)
Higher GPQA score (94.3% vs 82.8%)
Higher Humanity's Last Exam score (51.4% vs 24.3%)
Higher MCP Atlas score (69.2% vs 56.1%)
Higher MMMU-Pro score (80.5% vs 66.1%)
Higher SWE-Bench Pro score (54.2% vs 52.4%)
Higher Terminal-Bench 2.0 score (68.5% vs 46.3%)
OpenAI
Less expensive input tokens
Less expensive output tokens
Higher MRCR v2 (8-needle) score (33.1% vs 26.3%)

Detailed Comparison

AI Model Comparison Table
Feature
Google
Gemini 3.1 Pro
OpenAI
GPT-5.4 nano