Model Comparison

GPT-4o vs Gemini 2.5 Flash-Lite

GPT-4o significantly outperforms across most benchmarks. Gemini 2.5 Flash-Lite is 25.0x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

6 benchmarks

GPT-4o outperforms in 5 benchmarks (Aider-Polyglot, GPQA, Humanity's Last Exam, SimpleQA, SWE-Bench Verified), while Gemini 2.5 Flash-Lite is better at 1 benchmark (MMMU).

GPT-4o significantly outperforms across most benchmarks.

Wed Apr 29 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, GPT-4o ($2.50/1M tokens) is 25.0x more expensive than Gemini 2.5 Flash-Lite ($0.10/1M tokens).

For output processing, GPT-4o ($10.00/1M tokens) is 25.0x more expensive than Gemini 2.5 Flash-Lite ($0.40/1M tokens).

In conclusion, GPT-4o 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
Wed Apr 29 2026 • llm-stats.com
OpenAI
GPT-4o
Input tokens$2.50
Output tokens$10.00
Best providerAzure
Google
Gemini 2.5 Flash-Lite
Input tokens$0.10
Output tokens$0.40
Best providerGoogle
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Gemini 2.5 Flash-Lite accepts 1,048,576 input tokens compared to GPT-4o's 128,000 tokens. Gemini 2.5 Flash-Lite can generate longer responses up to 65,536 tokens, while GPT-4o is limited to 16,384 tokens.

OpenAI
GPT-4o
Input128,000 tokens
Output16,384 tokens
Google
Gemini 2.5 Flash-Lite
Input1,048,576 tokens
Output65,536 tokens
Wed Apr 29 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both GPT-4o and Gemini 2.5 Flash-Lite support multimodal inputs.

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

GPT-4o

Text
Images
Audio
Video

Gemini 2.5 Flash-Lite

Text
Images
Audio
Video

License

Usage and distribution terms

GPT-4o 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.

GPT-4o

Proprietary

Closed source

Gemini 2.5 Flash-Lite

Creative Commons Attribution 4.0 License

Open weights

Release Timeline

When each model was launched

GPT-4o was released on 2024-08-06, while Gemini 2.5 Flash-Lite was released on 2025-06-17.

Gemini 2.5 Flash-Lite is 11 months newer than GPT-4o.

GPT-4o

Aug 6, 2024

1.7 years ago

Gemini 2.5 Flash-Lite

Jun 17, 2025

10 months ago

10mo newer

Knowledge Cutoff

When training data ends

Gemini 2.5 Flash-Lite has a documented knowledge cutoff of 2025-01-01, while GPT-4o's cutoff date is not specified.

We can confirm Gemini 2.5 Flash-Lite's training data extends to 2025-01-01, but cannot make a direct comparison without GPT-4o's cutoff date.

GPT-4o

—

Gemini 2.5 Flash-Lite

Jan 2025

Provider Availability

GPT-4o is available from Azure, OpenAI. Gemini 2.5 Flash-Lite is available from Google.

GPT-4o

azure logo
Azure
Input Price:Input: $2.50/1MOutput Price:Output: $10.00/1M
openai logo
OpenAI
Input Price:Input: $2.50/1MOutput Price:Output: $10.00/1M

Gemini 2.5 Flash-Lite

google logo
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

OpenAI
Higher Aider-Polyglot score (30.7% vs 26.7%)
Higher GPQA score (70.1% vs 64.6%)
Higher Humanity's Last Exam score (5.3% vs 5.1%)
Higher SimpleQA score (38.2% vs 10.7%)
Higher SWE-Bench Verified score (33.2% vs 31.6%)
Google
Larger context window (1,048,576 tokens)
Less expensive input tokens
Less expensive output tokens
Has open weights
Higher MMMU score (72.9% vs 72.2%)

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
GPT-4o
Google
Gemini 2.5 Flash-Lite

FAQ

Common questions about GPT-4o vs Gemini 2.5 Flash-Lite

GPT-4o significantly outperforms across most benchmarks. GPT-4o 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.
GPT-4o scores AI2D: 94.2%, DocVQA: 92.8%, ChartQA: 85.7%, MMLU: 85.7%, CharXiv-D: 85.3%. 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%.
Gemini 2.5 Flash-Lite is 25.0x cheaper for input tokens. GPT-4o costs $2.50/M input and $10.00/M output via azure. Gemini 2.5 Flash-Lite costs $0.10/M input and $0.40/M output via google.
GPT-4o supports 128K 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.
Key differences include context window (128K vs 1.0M), input pricing ($2.50 vs $0.10/M), licensing (Proprietary vs Creative Commons Attribution 4.0 License). See the full comparison above for benchmark-by-benchmark results.
GPT-4o is developed by OpenAI and Gemini 2.5 Flash-Lite is developed by Google.