Model Comparison

Gemini 1.5 Pro vs GPT-5 nano

GPT-5 nano significantly outperforms across most benchmarks. GPT-5 nano is 31.8x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Gemini 1.5 Pro outperforms in 0 benchmarks, while GPT-5 nano is better at 1 benchmark (GPQA).

GPT-5 nano significantly outperforms across most benchmarks.

Sat May 30 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 1.5 Pro ($2.50/1M tokens) is 50.0x more expensive than GPT-5 nano ($0.05/1M tokens).

For output processing, Gemini 1.5 Pro ($10.00/1M tokens) is 25.0x more expensive than GPT-5 nano ($0.40/1M tokens).

In conclusion, Gemini 1.5 Pro is more expensive than GPT-5 nano.*

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

Lowest available price from all providers

Sat May 30 2026 • llm-stats.com

Gemini 1.5 Pro

Input tokens$2.50

Output tokens$10.00

Best providerGoogle

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 1.5 Pro accepts 2,097,152 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 1.5 Pro is limited to 8,192 tokens.

Gemini 1.5 Pro

Input2,097,152 tokens

Output8,192 tokens

GPT-5 nano

Input400,000 tokens

Output128,000 tokens

Sat May 30 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Gemini 1.5 Pro and GPT-5 nano support multimodal inputs.

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

Gemini 1.5 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 1.5 Pro

Proprietary

Closed source

GPT-5 nano

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 1.5 Pro was released on 2024-05-01, while GPT-5 nano was released on 2025-08-07.

GPT-5 nano is 15 months newer than Gemini 1.5 Pro.

Gemini 1.5 Pro

May 1, 2024

2.1 years ago

GPT-5 nano

Aug 7, 2025

9 months ago

1.3yr newer

Knowledge Cutoff

When training data ends

Gemini 1.5 Pro has a knowledge cutoff of 2023-11-01, while GPT-5 nano has a cutoff of 2024-05-30.

GPT-5 nano has more recent training data (up to 2024-05-30), making it potentially better informed about events through that date compared to Gemini 1.5 Pro (2023-11-01).

Gemini 1.5 Pro

Nov 2023

GPT-5 nano

May 2024

6 mo newer

Provider Availability

Gemini 1.5 Pro is available from Google. GPT-5 nano is available from OpenAI.

Gemini 1.5 Pro

Google

Input Price:Input: $2.50/1MOutput Price:Output: $10.00/1M

GPT-5 nano

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

Gemini 1.5 Pro

View details

Google

Larger context window (2,097,152 tokens)

GPT-5 nano

View details

OpenAI

Less expensive input tokens

Less expensive output tokens

Higher GPQA score (71.2% vs 59.1%)

Detailed Comparison

AI Model Comparison Table
Feature	Gemini 1.5 Pro	GPT-5 nano

FAQ

Common questions about Gemini 1.5 Pro vs GPT-5 nano.

Which is better, Gemini 1.5 Pro or GPT-5 nano?

GPT-5 nano significantly outperforms across most benchmarks. Gemini 1.5 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 1.5 Pro compare to GPT-5 nano in benchmarks?

Gemini 1.5 Pro scores XSTest: 98.8%, HellaSwag: 93.3%, GSM8k: 90.8%, BIG-Bench Hard: 89.2%, MGSM: 87.5%. 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 1.5 Pro cheaper than GPT-5 nano?

GPT-5 nano is 50.0x cheaper for input tokens. Gemini 1.5 Pro costs $2.50/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 1.5 Pro and GPT-5 nano?

Gemini 1.5 Pro supports 2.1M 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 1.5 Pro and GPT-5 nano?

Key differences include context window (2.1M vs 400K), input pricing ($2.50 vs $0.05/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 1.5 Pro and GPT-5 nano?

Gemini 1.5 Pro is developed by Google and GPT-5 nano is developed by OpenAI.