Model Comparison

Grok 4 Fast vs Grok Code Fast 1

Comparing Grok 4 Fast and Grok Code Fast 1 across benchmarks, pricing, and capabilities.

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Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

Grok 4 Fast and Grok Code Fast 1 don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

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) costs the same as Grok Code Fast 1 ($0.20/1M tokens).

For output processing, Grok 4 Fast ($0.50/1M tokens) is 3.0x cheaper than Grok Code Fast 1 ($1.50/1M tokens).

In conclusion, Grok Code Fast 1 is more expensive than Grok 4 Fast.*

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

Lowest available price from all providers
Wed May 20 2026 • llm-stats.com
xAI
Grok 4 Fast
Input tokens$0.20
Output tokens$0.50
Best providerxAI
xAI
Grok Code Fast 1
Input tokens$0.20
Output tokens$1.50
Best providerxAI
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 Grok Code Fast 1's 256,000 tokens. Grok 4 Fast can generate longer responses up to 30,000 tokens, while Grok Code Fast 1 is limited to 10,000 tokens.

xAI
Grok 4 Fast
Input2,000,000 tokens
Output30,000 tokens
xAI
Grok Code Fast 1
Input256,000 tokens
Output10,000 tokens
Wed May 20 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Grok 4 Fast supports multimodal inputs, whereas Grok Code Fast 1 does not.

Grok 4 Fast can handle both text and other forms of data like images, making it suitable for multimodal applications.

Grok 4 Fast

Text
Images
Audio
Video

Grok Code Fast 1

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 4 Fast

Proprietary

Closed source

Grok Code Fast 1

Proprietary

Closed source

Release Timeline

When each model was launched

Both models were released on 2025-08-28.

They likely represent similar generations of model development.

Grok 4 Fast

Aug 28, 2025

8 months ago

Grok Code Fast 1

Aug 28, 2025

8 months ago

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. Grok Code Fast 1 is available from xAI.

Grok 4 Fast

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

Grok Code Fast 1

xai logo
xAI
Input Price:Input: $0.20/1MOutput 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)
Supports multimodal inputs
Less expensive output tokens
xAI

No standout differentiators in the data we have for this pair.

Detailed Comparison

AI Model Comparison Table
Feature
xAI
Grok 4 Fast
xAI
Grok Code Fast 1

FAQ

Common questions about Grok 4 Fast vs Grok Code Fast 1.

Which is better, Grok 4 Fast or Grok Code Fast 1?

Grok 4 Fast (xAI) and Grok Code Fast 1 (xAI) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does Grok 4 Fast compare to Grok Code Fast 1 in benchmarks?

Grok 4 Fast scores SimpleQA: 95.0%, HMMT 2025: 93.3%, AIME 2025: 92.0%, GPQA: 85.7%, LiveCodeBench: 80.0%. Grok Code Fast 1 scores SWE-Bench Verified: 70.8%.

Is Grok 4 Fast cheaper than Grok Code Fast 1?

Both models cost $0.20 per million input tokens.

What are the context window sizes for Grok 4 Fast and Grok Code Fast 1?

Grok 4 Fast supports 2.0M tokens and Grok Code Fast 1 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 4 Fast and Grok Code Fast 1?

Key differences include context window (2.0M vs 256K), multimodal support (yes vs no). See the full comparison above for benchmark-by-benchmark results.