Model Comparison

GPT-5 vs Grok-3 Mini

GPT-5 significantly outperforms across most benchmarks. Grok-3 Mini is 9.8x cheaper per token.

Want to compare interactively?Try the playground

Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

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

GPT-5 significantly outperforms across most benchmarks.

Thu May 28 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Grok-3 Mini costs less

For input processing, GPT-5 ($1.25/1M tokens) is 4.2x more expensive than Grok-3 Mini ($0.30/1M tokens).

For output processing, GPT-5 ($10.00/1M tokens) is 20.0x more expensive than Grok-3 Mini ($0.50/1M tokens).

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

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

Lowest available price from all providers
Thu May 28 2026 • llm-stats.com
OpenAI
GPT-5
Input tokens$1.25
Output tokens$10.00
Best providerOpenAI
xAI
Grok-3 Mini
Input tokens$0.30
Output tokens$0.50
Best providerxAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

GPT-5 accepts 400,000 input tokens compared to Grok-3 Mini's 128,000 tokens. GPT-5 can generate longer responses up to 128,000 tokens, while Grok-3 Mini is limited to 8,000 tokens.

OpenAI
GPT-5
Input400,000 tokens
Output128,000 tokens
xAI
Grok-3 Mini
Input128,000 tokens
Output8,000 tokens
Thu May 28 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

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

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

GPT-5

Text
Images
Audio
Video

Grok-3 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.

GPT-5

Proprietary

Closed source

Grok-3 Mini

Proprietary

Closed source

Release Timeline

When each model was launched

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

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

GPT-5

Aug 7, 2025

9 months ago

5mo newer
Grok-3 Mini

Feb 17, 2025

1.3 years ago

Knowledge Cutoff

When training data ends

GPT-5 has a knowledge cutoff of 2024-09-30, while Grok-3 Mini has a cutoff of 2024-11-17.

Grok-3 Mini has more recent training data (up to 2024-11-17), making it potentially better informed about events through that date compared to GPT-5 (2024-09-30).

GPT-5

Sep 2024

Grok-3 Mini

Nov 2024

2 mo newer

Provider Availability

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

GPT-5

openai logo
OpenAI
Input Price:Input: $1.25/1MOutput Price:Output: $10.00/1M

Grok-3 Mini

xai logo
xAI
Input Price:Input: $0.30/1MOutput Price:Output: $0.50/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

OpenAI
Larger context window (400,000 tokens)
Higher AIME 2025 score (94.6% vs 90.8%)
Higher GPQA score (85.7% vs 84.0%)
xAI
Less expensive input tokens
Less expensive output tokens
OpenAIGPT-5
xAIGrok-3 Mini
Compare in Playground

Detailed Comparison

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

FAQ

Common questions about GPT-5 vs Grok-3 Mini.

Which is better, GPT-5 or Grok-3 Mini?

GPT-5 significantly outperforms across most benchmarks. GPT-5 is made by OpenAI and Grok-3 Mini is made by xAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does GPT-5 compare to Grok-3 Mini in benchmarks?

GPT-5 scores SWE-Lancer (IC-Diamond subset): 100.0%, COLLIE: 99.0%, Tau2 Telecom: 96.7%, OpenAI-MRCR: 2 needle 128k: 95.2%, AIME 2025: 94.6%. Grok-3 Mini scores AIME 2024: 95.8%, AIME 2025: 90.8%, GPQA: 84.0%, LiveCodeBench: 80.4%.

Is GPT-5 cheaper than Grok-3 Mini?

Grok-3 Mini is 4.2x cheaper for input tokens. GPT-5 costs $1.25/M input and $10.00/M output via openai. Grok-3 Mini costs $0.30/M input and $0.50/M output via xai.

What are the context window sizes for GPT-5 and Grok-3 Mini?

GPT-5 supports 400K tokens and Grok-3 Mini supports 128K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between GPT-5 and Grok-3 Mini?

Key differences include context window (400K vs 128K), input pricing ($1.25 vs $0.30/M). See the full comparison above for benchmark-by-benchmark results.

Who makes GPT-5 and Grok-3 Mini?

GPT-5 is developed by OpenAI and Grok-3 Mini is developed by xAI.