Model Comparison

o3-mini vs GPT-5 mini

GPT-5 mini significantly outperforms across most benchmarks. GPT-5 mini is 2.8x cheaper per token.

Want to compare interactively?Try the playground

Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

o3-mini outperforms in 0 benchmarks, while GPT-5 mini is better at 2 benchmarks (FrontierMath, GPQA).

GPT-5 mini significantly outperforms across most benchmarks.

Tue May 12 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

GPT-5 mini costs less

For input processing, o3-mini ($1.10/1M tokens) is 4.4x more expensive than GPT-5 mini ($0.25/1M tokens).

For output processing, o3-mini ($4.40/1M tokens) is 2.2x more expensive than GPT-5 mini ($2.00/1M tokens).

In conclusion, o3-mini is more expensive than GPT-5 mini.*

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

Lowest available price from all providers
Tue May 12 2026 • llm-stats.com
OpenAI
o3-mini
Input tokens$1.10
Output tokens$4.40
Best providerAzure
OpenAI
GPT-5 mini
Input tokens$0.25
Output tokens$2.00
Best providerOpenAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

GPT-5 mini accepts 400,000 input tokens compared to o3-mini's 200,000 tokens. GPT-5 mini can generate longer responses up to 128,000 tokens, while o3-mini is limited to 100,000 tokens.

OpenAI
o3-mini
Input200,000 tokens
Output100,000 tokens
OpenAI
GPT-5 mini
Input400,000 tokens
Output128,000 tokens
Tue May 12 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

GPT-5 mini supports multimodal inputs, whereas o3-mini does not.

GPT-5 mini can handle both text and other forms of data like images, making it suitable for multimodal applications.

o3-mini

Text
Images
Audio
Video

GPT-5 mini

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.

o3-mini

Proprietary

Closed source

GPT-5 mini

Proprietary

Closed source

Release Timeline

When each model was launched

o3-mini was released on 2025-01-30, while GPT-5 mini was released on 2025-08-07.

GPT-5 mini is 6 months newer than o3-mini.

o3-mini

Jan 30, 2025

1.3 years ago

GPT-5 mini

Aug 7, 2025

9 months ago

6mo newer

Knowledge Cutoff

When training data ends

o3-mini has a knowledge cutoff of 2023-09-30, while GPT-5 mini has a cutoff of 2024-05-30.

GPT-5 mini has more recent training data (up to 2024-05-30), making it potentially better informed about events through that date compared to o3-mini (2023-09-30).

o3-mini

Sep 2023

GPT-5 mini

May 2024

8 mo newer

Provider Availability

o3-mini is available from Azure, OpenAI. GPT-5 mini is available from OpenAI.

o3-mini

azure logo
Azure
Input Price:Input: $1.10/1MOutput Price:Output: $4.40/1M
openai logo
OpenAI
Input Price:Input: $1.10/1MOutput Price:Output: $4.40/1M

GPT-5 mini

openai logo
OpenAI
Input Price:Input: $0.25/1MOutput Price:Output: $2.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

OpenAI

No standout differentiators in the data we have for this pair.

OpenAI
Larger context window (400,000 tokens)
Supports multimodal inputs
Less expensive input tokens
Less expensive output tokens
Higher FrontierMath score (22.1% vs 9.2%)
Higher GPQA score (82.3% vs 77.2%)

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
o3-mini
OpenAI
GPT-5 mini

FAQ

Common questions about o3-mini vs GPT-5 mini.

Which is better, o3-mini or GPT-5 mini?

GPT-5 mini significantly outperforms across most benchmarks. o3-mini is made by OpenAI and GPT-5 mini is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does o3-mini compare to GPT-5 mini in benchmarks?

o3-mini scores COLLIE: 98.7%, MATH: 97.9%, IFEval: 93.9%, MGSM: 92.0%, AIME 2024: 87.3%. GPT-5 mini scores AIME 2025: 91.1%, HMMT 2025: 87.8%, GPQA: 82.3%, FrontierMath: 22.1%, Humanity's Last Exam: 16.7%.

Is o3-mini cheaper than GPT-5 mini?

GPT-5 mini is 4.4x cheaper for input tokens. o3-mini costs $1.10/M input and $4.40/M output via azure. GPT-5 mini costs $0.25/M input and $2.00/M output via openai.

What are the context window sizes for o3-mini and GPT-5 mini?

o3-mini supports 200K tokens and GPT-5 mini 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 o3-mini and GPT-5 mini?

Key differences include context window (200K vs 400K), input pricing ($1.10 vs $0.25/M), multimodal support (no vs yes). See the full comparison above for benchmark-by-benchmark results.