Model Comparison

Grok-3 vs Grok-4Which is better in 2026?

Grok-3 shows notably better performance in the majority of benchmarks. Grok-3 and Grok-4 cost the same.

Verdict: Grok-3 vs Grok-4 — which is better?

Grok-3 (by xAI) 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.

Grok-3 outperforms in 2 benchmarks (AIME 2025, LiveCodeBench), while Grok-4 is better at 1 benchmark (GPQA). Grok-3 shows notably better performance in the majority of benchmarks.

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

Choose Grok-3 if…

  • you want the strongest raw capability — it leads on 2 of 3 shared benchmarks

Choose Grok-4 if…

  • 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

3 benchmarks

Grok-3 outperforms in 2 benchmarks (AIME 2025, LiveCodeBench), while Grok-4 is better at 1 benchmark (GPQA).

Grok-3 shows notably better performance in the majority of benchmarks.

Sat Jun 27 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

For input processing, Grok-3 ($3.00/1M tokens) costs the same as Grok-4 ($3.00/1M tokens).

For output processing, Grok-3 ($15.00/1M tokens) costs the same as Grok-4 ($15.00/1M tokens).

In conclusion, Grok-3 and Grok-4 cost the same.*

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

Lowest available price from all providers
Sat Jun 27 2026 • llm-stats.com
xAI
Grok-3
Input tokens$3.00
Output tokens$15.00
Best providerxAI
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 Grok-3's 128,000 tokens. Both models can generate responses up to 8,000 tokens.

xAI
Grok-3
Input128,000 tokens
Output8,000 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 Grok-3 and Grok-4 support multimodal inputs.

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

Grok-3

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.

Grok-3

Proprietary

Closed source

Grok-4

Proprietary

Closed source

Release Timeline

When each model was launched

Grok-3 was released on 2025-02-17, while Grok-4 was released on 2025-07-09.

Grok-4 is 5 months newer than Grok-3.

Grok-3

Feb 17, 2025

1.4 years ago

Grok-4

Jul 9, 2025

11 months ago

4mo newer

Knowledge Cutoff

When training data ends

Grok-3 has a knowledge cutoff of 2024-11-17, 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 Grok-3 (2024-11-17).

Grok-3

Nov 2024

Grok-4

Dec 2024

1 mo newer

Provider Availability

Grok-3 is available from xAI. Grok-4 is available from xAI.

Grok-3

xai logo
xAI
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M

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

xAI
Higher AIME 2025 score (93.3% vs 91.7%)
Higher LiveCodeBench score (79.4% vs 79.0%)
xAI
Larger context window (256,000 tokens)
Higher GPQA score (87.5% vs 84.6%)
xAIGrok-3
xAIGrok-4
Compare in Playground

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Grok-3 and Grok-4 side-by-side, then vote on the output you prefer.

Grok-3
✓ Preferred
Grok-4
Open in Playground
AI Model Comparison Table
Feature
xAI
Grok-3
xAI
Grok-4

FAQ

Common questions about Grok-3 vs Grok-4.

Which is better, Grok-3 or Grok-4?

Grok-3 shows notably better performance in the majority of benchmarks. Grok-3 is made by xAI 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 Grok-3 compare to Grok-4 in benchmarks?

Grok-3 scores AIME 2024: 93.3%, AIME 2025: 93.3%, GPQA: 84.6%, LiveCodeBench: 79.4%, MMMU: 78.0%. Grok-4 scores AIME 2025: 91.7%, HMMT25: 90.0%, GPQA: 87.5%, LiveCodeBench: 79.0%, Humanity's Last Exam: 40.0%.

Is Grok-3 cheaper than Grok-4?

Both models cost $3.00 per million input tokens.

What are the context window sizes for Grok-3 and Grok-4?

Grok-3 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 Grok-3 and Grok-4?

Key differences include context window (128K vs 256K). See the full comparison above for benchmark-by-benchmark results.

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