Grok Code Fast 1 (reasoning)

Fast, intelligent, and verbose code generation.

Grok Code Fast 1 (reasoning)

A high-speed, intelligent code generation model from xAI, excelling in output velocity and large context handling.

Code GenerationHigh IntelligenceExceptional SpeedLarge ContextText-to-TextHigh VerbosityPremium Pricing

Grok Code Fast 1, developed by xAI, emerges as a formidable contender in the realm of AI models, particularly tailored for demanding code generation tasks. This proprietary model distinguishes itself through a remarkable combination of high intelligence, exceptional output speed, and an expansive context window, positioning it as a premium tool for developers and enterprises.

At its core, Grok Code Fast 1 boasts an impressive score of 49 on the Artificial Analysis Intelligence Index, significantly surpassing the average of 36 for comparable models. This places it among the top 25 models for intelligence, indicating robust reasoning capabilities essential for complex coding challenges. However, this intelligence comes with a notable characteristic: verbosity. During its intelligence evaluation, the model generated 87M tokens, far exceeding the average of 30M, suggesting it provides comprehensive, albeit extensive, outputs.

Performance-wise, Grok Code Fast 1 is a speed demon, achieving a median output speed of 239 tokens per second. This makes it one of the fastest models available, ranking #8 out of 134, a critical advantage for high-throughput applications. Complementing its speed is a substantial 256k token context window, allowing it to process and generate code based on vast amounts of input, from entire codebases to extensive documentation, ensuring highly contextual and relevant results.

While its capabilities are top-tier, the pricing structure reflects its premium standing. Input tokens are moderately priced at $0.20 per 1M tokens (compared to an average of $0.25), but output tokens are significantly more expensive at $1.50 per 1M tokens (versus an average of $0.80). This makes Grok Code Fast 1 a somewhat expensive option, especially given its inherent verbosity, which can quickly accumulate costs. The blended price (3:1 input:output) stands at $0.53 per 1M tokens.

In summary, Grok Code Fast 1 is an excellent choice for users prioritizing speed and intelligence in code generation, particularly when dealing with large and complex projects. Its high performance metrics justify its premium pricing, though careful cost management, especially concerning output verbosity, will be key to maximizing its value.

Scoreboard

Intelligence

49 (#25 / 134)

Grok Code Fast 1 scores 49 on the Artificial Analysis Intelligence Index, placing it well above average among comparable models (averaging 36). It demonstrates strong reasoning capabilities.
Output speed

239 tokens/s

Achieving 239 tokens/s, this model is exceptionally fast, ranking #8 among 134 models. Ideal for real-time or high-throughput applications.
Input price

$0.20 $/M tokens

At $0.20 per 1M input tokens, its input pricing is moderately competitive, aligning with the average for similar models ($0.25).
Output price

$1.50 $/M tokens

The output token price of $1.50 per 1M tokens is on the higher side, making it somewhat expensive for verbose outputs (average $0.80).
Verbosity signal

87M tokens

Generated 87M tokens during intelligence evaluation, significantly higher than the average of 30M, indicating a highly verbose output style.
Provider latency

10.34 seconds

A latency of 10.34 seconds to first token on xAI suggests potential for optimization in initial response times, despite high output speed.

Technical specifications

Spec Details
Owner xAI
License Proprietary
Context Window 256k tokens
Input Type Text
Output Type Text
Intelligence Index Score 49 (Rank #25/134)
Median Output Speed 239 tokens/s (Rank #8/134)
Latency (TTFT) 10.34 seconds
Input Token Price $0.20 / 1M tokens (Rank #40/134)
Output Token Price $1.50 / 1M tokens (Rank #91/134)
Blended Price (3:1) $0.53 / 1M tokens
Verbosity (Intelligence Index) 87M tokens (Rank #86/134)
Primary Use Case Code Generation, Complex Reasoning

What stands out beyond the scoreboard

Where this model wins
  • Exceptional output speed for high-throughput code generation tasks.
  • High intelligence score, suitable for complex reasoning and accurate code solutions.
  • Large 256k token context window, ideal for extensive codebases or detailed prompts.
  • Strong performance in code generation, delivering comprehensive and relevant outputs.
  • Reliable proprietary model from xAI, offering consistent performance.
Where costs sneak up
  • High output token price can lead to significant costs for verbose responses.
  • Elevated latency (TTFT) might impact user experience in highly interactive applications.
  • Its inherent verbosity, while useful for completeness, directly contributes to higher output costs.
  • Proprietary license limits flexibility compared to open-source alternatives.
  • The blended pricing model (3:1) still leans towards higher costs due to the expensive output tokens.

Provider pick

Grok Code Fast 1 is exclusively offered by xAI, simplifying the choice of provider. However, optimizing its usage within the xAI ecosystem still requires strategic considerations based on your priorities.

Priority Pick Why Tradeoff to accept
Max Performance xAI (Direct API) Unthrottled access, lowest latency for output speed, full feature set. Requires direct integration, potentially higher commitment.
Cost Efficiency (Input-heavy) xAI (Direct API) Competitive input pricing, direct control over usage. Output costs can still be high if not managed carefully.
Speed Optimization xAI (Direct API) Best output speed, direct connection to xAI's infrastructure. Initial latency (TTFT) remains a factor.
Large Context Handling xAI (Direct API) Full 256k context window available for comprehensive tasks. Processing large contexts can increase overall cost and processing time.

Note: Grok Code Fast 1 is exclusively offered by xAI. The 'Provider Pick' considerations therefore focus on optimizing usage within the xAI ecosystem.

Real workloads cost table

Understanding Grok Code Fast 1's performance in real-world scenarios helps in evaluating its cost-effectiveness and suitability for various development tasks. Here are a few examples:

Scenario Input Output What it represents Estimated cost
Complex Code Generation Detailed requirements for a new software module (10k tokens) Full code implementation, tests, and documentation (50k tokens) Leveraging intelligence and context for complete solutions. $0.077
Code Refactoring & Optimization Existing codebase snippet (20k tokens) Optimized code, explanation of changes (30k tokens) Applying intelligence to improve existing code. $0.049
API Integration Assistant API documentation, desired functionality (5k tokens) Code examples, integration steps (15k tokens) Quick generation of boilerplate and integration logic. $0.0235
Large-scale Code Review Multiple code files for review (100k tokens) Identified issues, suggested fixes (80k tokens) Utilizing large context for comprehensive analysis. $0.14
Rapid Prototyping High-level feature description (2k tokens) Minimal viable code for a feature (10k tokens) Fast iteration and initial development. $0.0154

These examples illustrate that while Grok Code Fast 1 excels in complex and extensive code tasks, its high output token price means that verbose outputs, even for moderately sized requests, can quickly accumulate costs. Strategic prompt engineering to control output length is crucial.

How to control cost (a practical playbook)

To maximize the value of Grok Code Fast 1 and mitigate its premium pricing, especially for output tokens, consider implementing these cost optimization strategies:

Control Verbosity to Manage Costs

Grok Code Fast 1's inherent verbosity is a double-edged sword: it provides comprehensive answers but drives up output token costs. Explicitly instruct the model to be concise, provide few-shot examples of desired output length, or implement post-processing to trim unnecessary content. Focus on extracting only the essential information needed for your application.

  • Use prompt engineering to specify desired output length (e.g., "Provide only the code, no explanations").
  • Implement post-generation parsing to remove boilerplate or redundant text.
  • Experiment with temperature settings to influence output conciseness.
Efficient Use of 256k Context Window

The large 256k token context window is powerful but comes with input token costs. Avoid sending redundant information. Summarize previous interactions, use retrieval-augmented generation (RAG) to inject only the most relevant snippets, and structure your prompts to maximize information density without unnecessary repetition. Only include what's strictly necessary for the model to perform its task.

  • Pre-process inputs to remove irrelevant data before sending to the model.
  • Utilize RAG systems to dynamically fetch and insert only pertinent information.
  • Structure prompts to be dense and efficient, avoiding conversational filler.
Maximize Throughput with Batching

Given Grok Code Fast 1's exceptional output speed, consider batching requests where the latency to first token isn't a critical factor for individual responses. This can improve overall system efficiency and throughput, potentially leading to better cost-per-task if your workload allows for parallel processing of multiple prompts.

  • Group similar, non-urgent requests into batches for processing.
  • Design asynchronous workflows to handle batched model calls.
  • Monitor API usage patterns to identify optimal batch sizes.
Continuous Monitoring for Cost Control

Regularly track your token usage, paying close attention to the ratio of input to output tokens. Set up alerts for budget thresholds and analyze usage patterns to identify unexpected spikes or inefficient prompt designs. Understanding where your costs are accumulating is the first step to effective optimization.

  • Implement detailed logging of token usage per request or feature.
  • Set up budget alerts within your xAI account or custom monitoring tools.
  • Periodically review and refine prompt templates based on cost data.

FAQ

What is Grok Code Fast 1's primary strength?

Grok Code Fast 1's primary strengths lie in its exceptional output speed (239 tokens/s) and high intelligence (score of 49 on the AAI Index) for code generation, coupled with a very large 256k token context window. This makes it ideal for complex, high-volume coding tasks.

Is Grok Code Fast 1 suitable for real-time applications?

While its output speed is very high, its latency to first token (10.34 seconds) might be a consideration for highly interactive, real-time applications where an immediate initial response is critical. For high-throughput, non-interactive tasks, it is exceptionally well-suited.

How does its pricing compare to other models?

Grok Code Fast 1's input token price ($0.20/M) is moderately competitive, but its output token price ($1.50/M) is on the higher side. This positions it as a premium model, especially for tasks that generate verbose outputs, where costs can accumulate quickly.

What does its 'verbosity' mean for users?

The model's high verbosity means it tends to generate more extensive outputs (87M tokens in evaluation compared to an average of 30M). While this can be beneficial for comprehensive answers, it directly impacts cost due to the higher output token price. Users should manage prompt instructions to control output length.

Can I use Grok Code Fast 1 for non-code generation tasks?

While optimized for code, its high intelligence and large context window suggest it could perform well on other complex text-to-text tasks requiring deep understanding and extensive output. However, its cost-effectiveness for such tasks would need careful evaluation against models specifically tuned for those domains.

What is the significance of its 256k context window?

A 256k token context window allows Grok Code Fast 1 to process and generate code based on extremely large inputs, such as entire codebases, extensive documentation, or long conversations. This enables highly contextual, comprehensive, and accurate responses, reducing the need for external information retrieval.

Is Grok Code Fast 1 available from multiple providers?

No, Grok Code Fast 1 is a proprietary model exclusively offered by xAI. Users must integrate directly with xAI's API to access its capabilities.


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