Model Comparison

Grok 4 Fast vs Mistral Large 3 (675B Instruct 2512)

Grok 4 Fast significantly outperforms across most benchmarks. Grok 4 Fast is 2.7x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

3 benchmarks

Grok 4 Fast outperforms in 3 benchmarks (GPQA, LiveCodeBench, SimpleQA), while Mistral Large 3 (675B Instruct 2512) is better at 0 benchmarks.

Grok 4 Fast significantly outperforms across most benchmarks.

Thu May 21 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Grok 4 Fast costs less

For input processing, Grok 4 Fast ($0.20/1M tokens) is 2.5x cheaper than Mistral Large 3 (675B Instruct 2512) ($0.50/1M tokens).

For output processing, Grok 4 Fast ($0.50/1M tokens) is 3.0x cheaper than Mistral Large 3 (675B Instruct 2512) ($1.50/1M tokens).

In conclusion, Mistral Large 3 (675B Instruct 2512) is more expensive than Grok 4 Fast.*

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

Lowest available price from all providers
Thu May 21 2026 • llm-stats.com
xAI
Grok 4 Fast
Input tokens$0.20
Output tokens$0.50
Best providerxAI
Mistral AI
Mistral Large 3 (675B Instruct 2512)
Input tokens$0.50
Output tokens$1.50
Best providerMistral
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Grok 4 Fast accepts 2,000,000 input tokens compared to Mistral Large 3 (675B Instruct 2512)'s 262,100 tokens. Mistral Large 3 (675B Instruct 2512) can generate longer responses up to 262,100 tokens, while Grok 4 Fast is limited to 30,000 tokens.

xAI
Grok 4 Fast
Input2,000,000 tokens
Output30,000 tokens
Mistral AI
Mistral Large 3 (675B Instruct 2512)
Input262,100 tokens
Output262,100 tokens
Thu May 21 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Grok 4 Fast and Mistral Large 3 (675B Instruct 2512) support multimodal inputs.

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

Grok 4 Fast

Text
Images
Audio
Video

Mistral Large 3 (675B Instruct 2512)

Text
Images
Audio
Video

License

Usage and distribution terms

Grok 4 Fast is licensed under a proprietary license, while Mistral Large 3 (675B Instruct 2512) uses Apache 2.0.

License differences may affect how you can use these models in commercial or open-source projects.

Grok 4 Fast

Proprietary

Closed source

Mistral Large 3 (675B Instruct 2512)

Apache 2.0

Open weights

Release Timeline

When each model was launched

Grok 4 Fast was released on 2025-08-28, while Mistral Large 3 (675B Instruct 2512) was released on 2025-12-04.

Mistral Large 3 (675B Instruct 2512) is 3 months newer than Grok 4 Fast.

Grok 4 Fast

Aug 28, 2025

8 months ago

Mistral Large 3 (675B Instruct 2512)

Dec 4, 2025

5 months ago

3mo newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Provider Availability

Grok 4 Fast is available from xAI. Mistral Large 3 (675B Instruct 2512) is available from Mistral AI.

Grok 4 Fast

xai logo
xAI
Input Price:Input: $0.20/1MOutput Price:Output: $0.50/1M

Mistral Large 3 (675B Instruct 2512)

mistral logo
Mistral
Input Price:Input: $0.50/1MOutput Price:Output: $1.50/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

xAI
Larger context window (2,000,000 tokens)
Less expensive input tokens
Less expensive output tokens
Higher GPQA score (85.7% vs 43.9%)
Higher LiveCodeBench score (80.0% vs 34.4%)
Higher SimpleQA score (95.0% vs 23.8%)
Mistral AI
Has open weights

Detailed Comparison

AI Model Comparison Table
Feature
xAI
Grok 4 Fast
Mistral AI
Mistral Large 3 (675B Instruct 2512)

FAQ

Common questions about Grok 4 Fast vs Mistral Large 3 (675B Instruct 2512).

Which is better, Grok 4 Fast or Mistral Large 3 (675B Instruct 2512)?

Grok 4 Fast significantly outperforms across most benchmarks. Grok 4 Fast is made by xAI and Mistral Large 3 (675B Instruct 2512) is made by Mistral AI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Grok 4 Fast compare to Mistral Large 3 (675B Instruct 2512) in benchmarks?

Grok 4 Fast scores SimpleQA: 95.0%, HMMT 2025: 93.3%, AIME 2025: 92.0%, GPQA: 85.7%, LiveCodeBench: 80.0%. Mistral Large 3 (675B Instruct 2512) scores MMMLU: 85.5%, AMC_2022_23: 52.0%, GPQA: 43.9%, LiveCodeBench: 34.4%, SimpleQA: 23.8%.

Is Grok 4 Fast cheaper than Mistral Large 3 (675B Instruct 2512)?

Grok 4 Fast is 2.5x cheaper for input tokens. Grok 4 Fast costs $0.20/M input and $0.50/M output via xai. Mistral Large 3 (675B Instruct 2512) costs $0.50/M input and $1.50/M output via mistral.

What are the context window sizes for Grok 4 Fast and Mistral Large 3 (675B Instruct 2512)?

Grok 4 Fast supports 2.0M tokens and Mistral Large 3 (675B Instruct 2512) supports 262K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Grok 4 Fast and Mistral Large 3 (675B Instruct 2512)?

Key differences include context window (2.0M vs 262K), input pricing ($0.20 vs $0.50/M), licensing (Proprietary vs Apache 2.0). See the full comparison above for benchmark-by-benchmark results.

Who makes Grok 4 Fast and Mistral Large 3 (675B Instruct 2512)?

Grok 4 Fast is developed by xAI and Mistral Large 3 (675B Instruct 2512) is developed by Mistral AI.