Gemini 2.5 Pro Preview 06-05 vs GPT-5 nano
Gemini 2.5 Pro Preview 06-05 significantly outperforms across most benchmarks. GPT-5 nano is 25.0x cheaper per token.
Google · OpenAI · Updated for 2026
Which is better?
Gemini 2.5 Pro Preview 06-05 outperforms in 3 benchmarks (AIME 2025, GPQA, Humanity's Last Exam), while GPT-5 nano is better at 0 benchmarks. Gemini 2.5 Pro Preview 06-05 significantly outperforms across most benchmarks.
On price, GPT-5 nano is roughly 25.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Gemini 2.5 Pro Preview 06-05 also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.
Based on current benchmark, pricing, and model metadata for 2026.
Choose Gemini 2.5 Pro Preview 06-05
- you want the strongest raw capability — it leads on 3 of 3 shared benchmarks
- you process long inputs — it offers a 1,048,576 token context window
Choose GPT-5 nano
- cost matters — it's about 25.0x cheaper per token
- you want the most recent training data — it shipped Aug 2025
At a glance
The differences that matter most.
Performance Benchmarks
Comparative analysis across standard metrics
Gemini 2.5 Pro Preview 06-05 outperforms in 3 benchmarks (AIME 2025, GPQA, Humanity's Last Exam), while GPT-5 nano is better at 0 benchmarks.
Gemini 2.5 Pro Preview 06-05 significantly outperforms across most benchmarks.
Arena Performance
Playground indexes and blind preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Gemini 2.5 Pro Preview 06-05 ($1.25/1M tokens) is 25.0x more expensive than GPT-5 nano ($0.05/1M tokens).
For output processing, Gemini 2.5 Pro Preview 06-05 ($10.00/1M tokens) is 25.0x more expensive than GPT-5 nano ($0.40/1M tokens).
In conclusion, Gemini 2.5 Pro Preview 06-05 is more expensive than GPT-5 nano.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Gemini 2.5 Pro Preview 06-05 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 Preview 06-05 is limited to 65,535 tokens.
Input Capabilities
Supported data types and modalities
Both Gemini 2.5 Pro Preview 06-05 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 Preview 06-05
GPT-5 nano
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
Gemini 2.5 Pro Preview 06-05 was released on 2025-06-05, while GPT-5 nano was released on 2025-08-07.
GPT-5 nano is 2 months newer than Gemini 2.5 Pro Preview 06-05.
Jun 5, 2025
1.2 years ago
Aug 7, 2025
1.1 years ago
2mo newerKnowledge Cutoff
When training data ends
Gemini 2.5 Pro Preview 06-05 has a knowledge cutoff of 2025-01-31, while GPT-5 nano has a cutoff of 2024-05-30.
Gemini 2.5 Pro Preview 06-05 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).
Jan 2025
8 mo newerMay 2024
Provider Availability
Gemini 2.5 Pro Preview 06-05 is available from Google. GPT-5 nano is available from OpenAI.
Gemini 2.5 Pro Preview 06-05
GPT-5 nano
Outputs Comparison
Judge for yourself.
Run your own prompts against Gemini 2.5 Pro Preview 06-05 and GPT-5 nano side-by-side, then vote on the output you prefer.
FAQ
Common questions about Gemini 2.5 Pro Preview 06-05 vs GPT-5 nano.