Model Comparison

o3-mini vs Gemini 2.5 Flash-Lite

o3-mini significantly outperforms across most benchmarks. Gemini 2.5 Flash-Lite is 11.0x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

4 benchmarks

o3-mini outperforms in 4 benchmarks (Aider-Polyglot, GPQA, SimpleQA, SWE-Bench Verified), while Gemini 2.5 Flash-Lite is better at 0 benchmarks.

o3-mini significantly outperforms across most benchmarks.

Fri May 15 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Gemini 2.5 Flash-Lite costs less

For input processing, o3-mini ($1.10/1M tokens) is 11.0x more expensive than Gemini 2.5 Flash-Lite ($0.10/1M tokens).

For output processing, o3-mini ($4.40/1M tokens) is 11.0x more expensive than Gemini 2.5 Flash-Lite ($0.40/1M tokens).

In conclusion, o3-mini is more expensive than Gemini 2.5 Flash-Lite.*

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

Lowest available price from all providers

Fri May 15 2026 • llm-stats.com

o3-mini

Input tokens$1.10

Output tokens$4.40

Best providerAzure

Gemini 2.5 Flash-Lite

Input tokens$0.10

Output tokens$0.40

Best providerGoogle

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Context Window

Maximum input and output token capacity

Gemini 2.5 Flash-Lite accepts 1,048,576 input tokens compared to o3-mini's 200,000 tokens. o3-mini can generate longer responses up to 100,000 tokens, while Gemini 2.5 Flash-Lite is limited to 65,536 tokens.

o3-mini

Input200,000 tokens

Output100,000 tokens

Gemini 2.5 Flash-Lite

Input1,048,576 tokens

Output65,536 tokens

Fri May 15 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Gemini 2.5 Flash-Lite supports multimodal inputs, whereas o3-mini does not.

Gemini 2.5 Flash-Lite can handle both text and other forms of data like images, making it suitable for multimodal applications.

o3-mini

Text

Images

Audio

Video

Gemini 2.5 Flash-Lite

Text

Images

Audio

Video

License

Usage and distribution terms

o3-mini is licensed under a proprietary license, while Gemini 2.5 Flash-Lite uses Creative Commons Attribution 4.0 License.

License differences may affect how you can use these models in commercial or open-source projects.

o3-mini

Proprietary

Closed source

Gemini 2.5 Flash-Lite

Creative Commons Attribution 4.0 License

Open weights

Release Timeline

When each model was launched

o3-mini was released on 2025-01-30, while Gemini 2.5 Flash-Lite was released on 2025-06-17.

Gemini 2.5 Flash-Lite is 5 months newer than o3-mini.

o3-mini

Jan 30, 2025

1.3 years ago

Gemini 2.5 Flash-Lite

Jun 17, 2025

11 months ago

4mo newer

Knowledge Cutoff

When training data ends

o3-mini has a knowledge cutoff of 2023-09-30, while Gemini 2.5 Flash-Lite has a cutoff of 2025-01-01.

Gemini 2.5 Flash-Lite has more recent training data (up to 2025-01-01), making it potentially better informed about events through that date compared to o3-mini (2023-09-30).

o3-mini

Sep 2023

Gemini 2.5 Flash-Lite

Jan 2025

1.3 yr newer

Provider Availability

o3-mini is available from Azure, OpenAI. Gemini 2.5 Flash-Lite is available from Google.

o3-mini

Azure

Input Price:Input: $1.10/1MOutput Price:Output: $4.40/1M

OpenAI

Input Price:Input: $1.10/1MOutput Price:Output: $4.40/1M

Gemini 2.5 Flash-Lite

Google

Input Price:Input: $0.10/1MOutput Price:Output: $0.40/1M

* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

o3-mini

View details

OpenAI

Higher Aider-Polyglot score (66.7% vs 26.7%)

Higher GPQA score (77.2% vs 64.6%)

Higher SimpleQA score (15.0% vs 10.7%)

Higher SWE-Bench Verified score (49.3% vs 31.6%)

Gemini 2.5 Flash-Lite

View details

Google

Larger context window (1,048,576 tokens)

Supports multimodal inputs

Less expensive input tokens

Less expensive output tokens

Has open weights

Detailed Comparison

AI Model Comparison Table
Feature	o3-mini	Gemini 2.5 Flash-Lite

FAQ

Common questions about o3-mini vs Gemini 2.5 Flash-Lite.

Which is better, o3-mini or Gemini 2.5 Flash-Lite?

o3-mini significantly outperforms across most benchmarks. o3-mini is made by OpenAI and Gemini 2.5 Flash-Lite is made by Google. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does o3-mini compare to Gemini 2.5 Flash-Lite in benchmarks?

o3-mini scores COLLIE: 98.7%, MATH: 97.9%, IFEval: 93.9%, MGSM: 92.0%, AIME 2024: 87.3%. Gemini 2.5 Flash-Lite scores FACTS Grounding: 84.1%, Global-MMLU-Lite: 81.1%, MMMU: 72.9%, GPQA: 64.6%, Vibe-Eval: 51.3%.

Is o3-mini cheaper than Gemini 2.5 Flash-Lite?

Gemini 2.5 Flash-Lite is 11.0x cheaper for input tokens. o3-mini costs $1.10/M input and $4.40/M output via azure. Gemini 2.5 Flash-Lite costs $0.10/M input and $0.40/M output via google.

What are the context window sizes for o3-mini and Gemini 2.5 Flash-Lite?

o3-mini supports 200K tokens and Gemini 2.5 Flash-Lite supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between o3-mini and Gemini 2.5 Flash-Lite?

Key differences include context window (200K vs 1.0M), input pricing ($1.10 vs $0.10/M), multimodal support (no vs yes), licensing (Proprietary vs Creative Commons Attribution 4.0 License). See the full comparison above for benchmark-by-benchmark results.

Who makes o3-mini and Gemini 2.5 Flash-Lite?

o3-mini is developed by OpenAI and Gemini 2.5 Flash-Lite is developed by Google.