Model Comparison

GPT-5 mini vs Grok-3

Grok-3 significantly outperforms across most benchmarks. GPT-5 mini is 8.7x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

GPT-5 mini outperforms in 0 benchmarks, while Grok-3 is better at 2 benchmarks (AIME 2025, GPQA).

Grok-3 significantly outperforms across most benchmarks.

Wed Apr 01 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

GPT-5 mini costs less

For input processing, GPT-5 mini ($0.25/1M tokens) is 12.0x cheaper than Grok-3 ($3.00/1M tokens).

For output processing, GPT-5 mini ($2.00/1M tokens) is 7.5x cheaper than Grok-3 ($15.00/1M tokens).

In conclusion, Grok-3 is more expensive than GPT-5 mini.*

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

Lowest available price from all providers
Wed Apr 01 2026 • llm-stats.com
OpenAI
GPT-5 mini
Input tokens$0.25
Output tokens$2.00
Best providerOpenAI
xAI
Grok-3
Input tokens$3.00
Output tokens$15.00
Best providerxAI
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 Grok-3's 128,000 tokens. GPT-5 mini can generate longer responses up to 128,000 tokens, while Grok-3 is limited to 8,000 tokens.

OpenAI
GPT-5 mini
Input400,000 tokens
Output128,000 tokens
xAI
Grok-3
Input128,000 tokens
Output8,000 tokens
Wed Apr 01 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both GPT-5 mini and Grok-3 support multimodal inputs.

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

GPT-5 mini

Text
Images
Audio
Video

Grok-3

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.

GPT-5 mini

Proprietary

Closed source

Grok-3

Proprietary

Closed source

Release Timeline

When each model was launched

GPT-5 mini was released on 2025-08-07, while Grok-3 was released on 2025-02-17.

GPT-5 mini is 6 months newer than Grok-3.

GPT-5 mini

Aug 7, 2025

7 months ago

5mo newer
Grok-3

Feb 17, 2025

1.1 years ago

Knowledge Cutoff

When training data ends

GPT-5 mini has a knowledge cutoff of 2024-05-30, while Grok-3 has a cutoff of 2024-11-17.

Grok-3 has more recent training data (up to 2024-11-17), making it potentially better informed about events through that date compared to GPT-5 mini (2024-05-30).

GPT-5 mini

May 2024

Grok-3

Nov 2024

6 mo newer

Provider Availability

GPT-5 mini is available from OpenAI. Grok-3 is available from xAI.

GPT-5 mini

openai logo
OpenAI
Input Price:Input: $0.25/1MOutput Price:Output: $2.00/1M

Grok-3

xai logo
xAI
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

OpenAI
Larger context window (400,000 tokens)
Less expensive input tokens
Less expensive output tokens
xAI
Higher AIME 2025 score (93.3% vs 91.1%)
Higher GPQA score (84.6% vs 82.3%)
OpenAIGPT-5 mini
xAIGrok-3
Compare in Playground

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
GPT-5 mini
xAI
Grok-3

FAQ

Common questions about GPT-5 mini vs Grok-3

Grok-3 significantly outperforms across most benchmarks. GPT-5 mini is made by OpenAI and Grok-3 is made by xAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.
GPT-5 mini scores AIME 2025: 91.1%, HMMT 2025: 87.8%, GPQA: 82.3%, FrontierMath: 22.1%, Humanity's Last Exam: 16.7%. Grok-3 scores AIME 2024: 93.3%, AIME 2025: 93.3%, GPQA: 84.6%, LiveCodeBench: 79.4%, MMMU: 78.0%.
GPT-5 mini is 12.0x cheaper for input tokens. GPT-5 mini costs $0.25/M input and $2.00/M output via openai. Grok-3 costs $3.00/M input and $15.00/M output via xai.
GPT-5 mini supports 400K tokens and Grok-3 supports 128K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.
Key differences include context window (400K vs 128K), input pricing ($0.25 vs $3.00/M). See the full comparison above for benchmark-by-benchmark results.
GPT-5 mini is developed by OpenAI and Grok-3 is developed by xAI.