Model Comparison

GPT-4o mini vs Grok-4Which is better in 2026?

Grok-4 significantly outperforms across most benchmarks. GPT-4o mini is 22.9x cheaper per token.

Verdict: GPT-4o mini vs Grok-4 — which is better?

GPT-4o mini (by OpenAI) and Grok-4 (by xAI) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

GPT-4o mini outperforms in 0 benchmarks, while Grok-4 is better at 1 benchmark (GPQA). Grok-4 significantly outperforms across most benchmarks.

On price, GPT-4o mini is roughly 22.9x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Grok-4 also accepts a larger context window (256,000 input tokens), making it the stronger choice for long documents and large codebases.

Choose GPT-4o mini if…

  • cost matters — it's about 22.9x cheaper per token

Choose Grok-4 if…

  • you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
  • you process long inputs — it offers a 256,000 token context window
  • you want the most recent training data — it shipped Jul 2025

Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

GPT-4o mini outperforms in 0 benchmarks, while Grok-4 is better at 1 benchmark (GPQA).

Grok-4 significantly outperforms across most benchmarks.

Sat Jun 27 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

GPT-4o mini costs less

For input processing, GPT-4o mini ($0.15/1M tokens) is 20.0x cheaper than Grok-4 ($3.00/1M tokens).

For output processing, GPT-4o mini ($0.60/1M tokens) is 25.0x cheaper than Grok-4 ($15.00/1M tokens).

In conclusion, Grok-4 is more expensive than GPT-4o mini.*

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

Lowest available price from all providers
Sat Jun 27 2026 • llm-stats.com
OpenAI
GPT-4o mini
Input tokens$0.15
Output tokens$0.60
Best providerAzure
xAI
Grok-4
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

Grok-4 accepts 256,000 input tokens compared to GPT-4o mini's 128,000 tokens. GPT-4o mini can generate longer responses up to 16,384 tokens, while Grok-4 is limited to 8,000 tokens.

OpenAI
GPT-4o mini
Input128,000 tokens
Output16,384 tokens
xAI
Grok-4
Input256,000 tokens
Output8,000 tokens
Sat Jun 27 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both GPT-4o mini and Grok-4 support multimodal inputs.

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

GPT-4o mini

Text
Images
Audio
Video

Grok-4

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-4o mini

Proprietary

Closed source

Grok-4

Proprietary

Closed source

Release Timeline

When each model was launched

GPT-4o mini was released on 2024-07-18, while Grok-4 was released on 2025-07-09.

Grok-4 is 12 months newer than GPT-4o mini.

GPT-4o mini

Jul 18, 2024

1.9 years ago

Grok-4

Jul 9, 2025

11 months ago

11mo newer

Knowledge Cutoff

When training data ends

GPT-4o mini has a knowledge cutoff of 2023-10-01, while Grok-4 has a cutoff of 2024-12-31.

Grok-4 has more recent training data (up to 2024-12-31), making it potentially better informed about events through that date compared to GPT-4o mini (2023-10-01).

GPT-4o mini

Oct 2023

Grok-4

Dec 2024

1.2 yr newer

Provider Availability

GPT-4o mini is available from Azure. Grok-4 is available from xAI.

GPT-4o mini

azure logo
Azure
Input Price:Input: $0.15/1MOutput Price:Output: $0.60/1M

Grok-4

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

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

OpenAI
Less expensive input tokens
Less expensive output tokens
xAI
Larger context window (256,000 tokens)
Higher GPQA score (87.5% vs 40.2%)
OpenAIGPT-4o mini
xAIGrok-4
Compare in Playground

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against GPT-4o mini and Grok-4 side-by-side, then vote on the output you prefer.

GPT-4o mini
✓ Preferred
Grok-4
Open in Playground
AI Model Comparison Table
Feature
OpenAI
GPT-4o mini
xAI
Grok-4

FAQ

Common questions about GPT-4o mini vs Grok-4.

Which is better, GPT-4o mini or Grok-4?

Grok-4 significantly outperforms across most benchmarks. GPT-4o mini is made by OpenAI and Grok-4 is made by xAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does GPT-4o mini compare to Grok-4 in benchmarks?

GPT-4o mini scores HumanEval: 87.2%, MGSM: 87.0%, MMLU: 82.0%, DROP: 79.7%, MATH: 70.2%. Grok-4 scores AIME 2025: 91.7%, HMMT25: 90.0%, GPQA: 87.5%, LiveCodeBench: 79.0%, Humanity's Last Exam: 40.0%.

Is GPT-4o mini cheaper than Grok-4?

GPT-4o mini is 20.0x cheaper for input tokens. GPT-4o mini costs $0.15/M input and $0.60/M output via azure. Grok-4 costs $3.00/M input and $15.00/M output via xai.

What are the context window sizes for GPT-4o mini and Grok-4?

GPT-4o mini supports 128K tokens and Grok-4 supports 256K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between GPT-4o mini and Grok-4?

Key differences include context window (128K vs 256K), input pricing ($0.15 vs $3.00/M). See the full comparison above for benchmark-by-benchmark results.

Who makes GPT-4o mini and Grok-4?

GPT-4o mini is developed by OpenAI and Grok-4 is developed by xAI.

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