Model Comparison

Gemini 3 Pro vs GPT-5.1 Thinking

Gemini 3 Pro shows notably better performance in the majority of benchmarks. GPT-5.1 Thinking is 1.3x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

3 benchmarks

Gemini 3 Pro outperforms in 2 benchmarks (AIME 2025, GPQA), while GPT-5.1 Thinking is better at 1 benchmark (SWE-Bench Verified).

Gemini 3 Pro shows notably better performance in the majority of benchmarks.

Fri Apr 17 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

GPT-5.1 Thinking costs less

For input processing, Gemini 3 Pro ($2.00/1M tokens) is 1.6x more expensive than GPT-5.1 Thinking ($1.25/1M tokens).

For output processing, Gemini 3 Pro ($12.00/1M tokens) is 1.2x more expensive than GPT-5.1 Thinking ($10.00/1M tokens).

In conclusion, Gemini 3 Pro is more expensive than GPT-5.1 Thinking.*

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

Lowest available price from all providers
Fri Apr 17 2026 • llm-stats.com
Google
Gemini 3 Pro
Input tokens$2.00
Output tokens$12.00
Best providerGoogle
OpenAI
GPT-5.1 Thinking
Input tokens$1.25
Output tokens$10.00
Best providerOpenAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Gemini 3 Pro accepts 1,048,576 input tokens compared to GPT-5.1 Thinking's 400,000 tokens. GPT-5.1 Thinking can generate longer responses up to 128,000 tokens, while Gemini 3 Pro is limited to 65,536 tokens.

Google
Gemini 3 Pro
Input1,048,576 tokens
Output65,536 tokens
OpenAI
GPT-5.1 Thinking
Input400,000 tokens
Output128,000 tokens
Fri Apr 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Gemini 3 Pro and GPT-5.1 Thinking support multimodal inputs.

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

Gemini 3 Pro

Text
Images
Audio
Video

GPT-5.1 Thinking

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 Pro

Proprietary

Closed source

GPT-5.1 Thinking

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 3 Pro was released on 2025-11-18, while GPT-5.1 Thinking was released on 2025-11-12.

Gemini 3 Pro is 0 month newer than GPT-5.1 Thinking.

Gemini 3 Pro

Nov 18, 2025

5 months ago

6d newer
GPT-5.1 Thinking

Nov 12, 2025

5 months ago

Knowledge Cutoff

When training data ends

Gemini 3 Pro has a documented knowledge cutoff of 2025-01-31, while GPT-5.1 Thinking's cutoff date is not specified.

We can confirm Gemini 3 Pro's training data extends to 2025-01-31, but cannot make a direct comparison without GPT-5.1 Thinking's cutoff date.

Gemini 3 Pro

Jan 2025

GPT-5.1 Thinking

—

Provider Availability

Gemini 3 Pro is available from Google. GPT-5.1 Thinking is available from OpenAI.

Gemini 3 Pro

google logo
Google
Input Price:Input: $2.00/1MOutput Price:Output: $12.00/1M

GPT-5.1 Thinking

openai logo
OpenAI
Input Price:Input: $1.25/1MOutput Price:Output: $10.00/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

Google
Larger context window (1,048,576 tokens)
Higher AIME 2025 score (100.0% vs 94.0%)
Higher GPQA score (91.9% vs 88.1%)
OpenAI
Less expensive input tokens
Less expensive output tokens
Higher SWE-Bench Verified score (76.3% vs 76.2%)

Detailed Comparison

AI Model Comparison Table
Feature
Google
Gemini 3 Pro
OpenAI
GPT-5.1 Thinking

FAQ

Common questions about Gemini 3 Pro vs GPT-5.1 Thinking

Gemini 3 Pro shows notably better performance in the majority of benchmarks. Gemini 3 Pro is made by Google and GPT-5.1 Thinking is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.
Gemini 3 Pro scores AIME 2025: 100.0%, Vending-Bench 2: 100.0%, Global PIQA: 93.4%, GPQA: 91.9%, MMMLU: 91.8%. GPT-5.1 Thinking scores Tau2 Telecom: 95.6%, AIME 2025: 94.0%, BrowseComp Long Context 128k: 90.0%, GPQA: 88.1%, MMMU: 85.4%.
GPT-5.1 Thinking is 1.6x cheaper for input tokens. Gemini 3 Pro costs $2.00/M input and $12.00/M output via google. GPT-5.1 Thinking costs $1.25/M input and $10.00/M output via openai.
Gemini 3 Pro supports 1.0M tokens and GPT-5.1 Thinking supports 400K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.
Key differences include context window (1.0M vs 400K), input pricing ($2.00 vs $1.25/M). See the full comparison above for benchmark-by-benchmark results.
Gemini 3 Pro is developed by Google and GPT-5.1 Thinking is developed by OpenAI.