Model Comparison

Gemini 2.5 Pro vs GPT-5 nano

Gemini 2.5 Pro shows notably better performance in the majority of benchmarks. GPT-5 nano is 25.0x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

3 benchmarks

Gemini 2.5 Pro outperforms in 2 benchmarks (GPQA, Humanity's Last Exam), while GPT-5 nano is better at 1 benchmark (AIME 2025).

Gemini 2.5 Pro shows notably better performance in the majority of benchmarks.

Fri May 08 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

GPT-5 nano costs less

For input processing, Gemini 2.5 Pro ($1.25/1M tokens) is 25.0x more expensive than GPT-5 nano ($0.05/1M tokens).

For output processing, Gemini 2.5 Pro ($10.00/1M tokens) is 25.0x more expensive than GPT-5 nano ($0.40/1M tokens).

In conclusion, Gemini 2.5 Pro is more expensive than GPT-5 nano.*

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

Lowest available price from all providers
Fri May 08 2026 • llm-stats.com
Google
Gemini 2.5 Pro
Input tokens$1.25
Output tokens$10.00
Best providerGoogle
OpenAI
GPT-5 nano
Input tokens$0.05
Output tokens$0.40
Best providerOpenAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Gemini 2.5 Pro accepts 1,048,576 input tokens compared to GPT-5 nano's 400,000 tokens. GPT-5 nano can generate longer responses up to 128,000 tokens, while Gemini 2.5 Pro is limited to 65,536 tokens.

Google
Gemini 2.5 Pro
Input1,048,576 tokens
Output65,536 tokens
OpenAI
GPT-5 nano
Input400,000 tokens
Output128,000 tokens
Fri May 08 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Gemini 2.5 Pro and GPT-5 nano support multimodal inputs.

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

Gemini 2.5 Pro

Text
Images
Audio
Video

GPT-5 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 2.5 Pro

Proprietary

Closed source

GPT-5 nano

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 2.5 Pro was released on 2025-05-20, while GPT-5 nano was released on 2025-08-07.

GPT-5 nano is 3 months newer than Gemini 2.5 Pro.

Gemini 2.5 Pro

May 20, 2025

11 months ago

GPT-5 nano

Aug 7, 2025

9 months ago

2mo newer

Knowledge Cutoff

When training data ends

Gemini 2.5 Pro has a knowledge cutoff of 2025-01-31, while GPT-5 nano has a cutoff of 2024-05-30.

Gemini 2.5 Pro has more recent training data (up to 2025-01-31), making it potentially better informed about events through that date compared to GPT-5 nano (2024-05-30).

Gemini 2.5 Pro

Jan 2025

8 mo newer
GPT-5 nano

May 2024

Provider Availability

Gemini 2.5 Pro is available from Google. GPT-5 nano is available from OpenAI.

Gemini 2.5 Pro

google logo
Google
Input Price:Input: $1.25/1MOutput Price:Output: $10.00/1M

GPT-5 nano

openai logo
OpenAI
Input Price:Input: $0.05/1MOutput Price:Output: $0.40/1M
* 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 (83.0% vs 71.2%)
Higher Humanity's Last Exam score (17.8% vs 8.7%)
OpenAI
Less expensive input tokens
Less expensive output tokens
Higher AIME 2025 score (85.2% vs 83.0%)
GoogleGemini 2.5 Pro
OpenAIGPT-5 nano
Compare in Playground

Detailed Comparison

AI Model Comparison Table
Feature
Google
Gemini 2.5 Pro
OpenAI
GPT-5 nano

FAQ

Common questions about Gemini 2.5 Pro vs GPT-5 nano.

Which is better, Gemini 2.5 Pro or GPT-5 nano?

Gemini 2.5 Pro shows notably better performance in the majority of benchmarks. Gemini 2.5 Pro is made by Google and GPT-5 nano is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Gemini 2.5 Pro compare to GPT-5 nano in benchmarks?

Gemini 2.5 Pro scores MRCR: 93.0%, AIME 2024: 92.0%, Global-MMLU-Lite: 88.6%, Video-MME: 84.8%, AIME 2025: 83.0%. GPT-5 nano scores AIME 2025: 85.2%, HMMT 2025: 75.6%, GPQA: 71.2%, FrontierMath: 9.6%, Humanity's Last Exam: 8.7%.

Is Gemini 2.5 Pro cheaper than GPT-5 nano?

GPT-5 nano is 25.0x cheaper for input tokens. Gemini 2.5 Pro costs $1.25/M input and $10.00/M output via google. GPT-5 nano costs $0.05/M input and $0.40/M output via openai.

What are the context window sizes for Gemini 2.5 Pro and GPT-5 nano?

Gemini 2.5 Pro supports 1.0M tokens and GPT-5 nano supports 400K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Gemini 2.5 Pro and GPT-5 nano?

Key differences include context window (1.0M vs 400K), input pricing ($1.25 vs $0.05/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 2.5 Pro and GPT-5 nano?

Gemini 2.5 Pro is developed by Google and GPT-5 nano is developed by OpenAI.