Model Comparison

Gemini 2.5 Pro vs o3

o3 shows notably better performance in the majority of benchmarks. Gemini 2.5 Pro is 1.0x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

8 benchmarks

Gemini 2.5 Pro outperforms in 2 benchmarks (AIME 2024, Humanity's Last Exam), while o3 is better at 6 benchmarks (Aider-Polyglot, AIME 2025, ARC-AGI v2, GPQA, MMMU, SWE-Bench Verified).

o3 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

Gemini 2.5 Pro costs less

For input processing, Gemini 2.5 Pro ($1.25/1M tokens) is 1.6x cheaper than o3 ($2.00/1M tokens).

For output processing, Gemini 2.5 Pro ($10.00/1M tokens) is 1.3x more expensive than o3 ($8.00/1M tokens).

In conclusion, o3 is more expensive than Gemini 2.5 Pro.*

* 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
o3
Input tokens$2.00
Output tokens$8.00
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 o3's 200,000 tokens. o3 can generate longer responses up to 100,000 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
o3
Input200,000 tokens
Output100,000 tokens
Fri May 08 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Gemini 2.5 Pro and o3 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

o3

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

o3

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 2.5 Pro was released on 2025-05-20, while o3 was released on 2025-04-16.

Gemini 2.5 Pro is 1 month newer than o3.

Gemini 2.5 Pro

May 20, 2025

11 months ago

1mo newer
o3

Apr 16, 2025

1.1 years ago

Knowledge Cutoff

When training data ends

Gemini 2.5 Pro has a knowledge cutoff of 2025-01-31, while o3 has a cutoff of 2024-05-31.

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 o3 (2024-05-31).

Gemini 2.5 Pro

Jan 2025

8 mo newer
o3

May 2024

Provider Availability

Gemini 2.5 Pro is available from Google. o3 is available from OpenAI.

Gemini 2.5 Pro

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

o3

openai logo
OpenAI
Input Price:Input: $2.00/1MOutput Price:Output: $8.00/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

Google
Larger context window (1,048,576 tokens)
Less expensive input tokens
Higher AIME 2024 score (92.0% vs 91.6%)
Higher Humanity's Last Exam score (17.8% vs 14.7%)
OpenAI
Less expensive output tokens
Higher Aider-Polyglot score (81.3% vs 76.5%)
Higher AIME 2025 score (86.4% vs 83.0%)
Higher ARC-AGI v2 score (6.5% vs 4.9%)
Higher GPQA score (83.3% vs 83.0%)
Higher MMMU score (82.9% vs 79.6%)
Higher SWE-Bench Verified score (69.1% vs 63.2%)
GoogleGemini 2.5 Pro
OpenAIo3
Compare in Playground

Detailed Comparison

AI Model Comparison Table
Feature
Google
Gemini 2.5 Pro
OpenAI
o3

FAQ

Common questions about Gemini 2.5 Pro vs o3.

Which is better, Gemini 2.5 Pro or o3?

o3 shows notably better performance in the majority of benchmarks. Gemini 2.5 Pro is made by Google and o3 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 o3 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%. o3 scores COLLIE: 98.4%, AIME 2024: 91.6%, ARC-AGI: 88.0%, MathVista: 86.8%, AIME 2025: 86.4%.

Is Gemini 2.5 Pro cheaper than o3?

Gemini 2.5 Pro is 1.6x cheaper for input tokens. Gemini 2.5 Pro costs $1.25/M input and $10.00/M output via google. o3 costs $2.00/M input and $8.00/M output via openai.

What are the context window sizes for Gemini 2.5 Pro and o3?

Gemini 2.5 Pro supports 1.0M tokens and o3 supports 200K 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 o3?

Key differences include context window (1.0M vs 200K), input pricing ($1.25 vs $2.00/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 2.5 Pro and o3?

Gemini 2.5 Pro is developed by Google and o3 is developed by OpenAI.