Grok Code Fast 1 — xAI | Modeldex

Grok Code Fast 1

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Grok Code Fast 1 is a speedy and economical reasoning model that excels at agentic coding. With reasoning traces visible in the response, developers can steer Grok Code for high-quality...

Updated 4 days agoStructured data from Modeldex catalog

Long context

Knowledge cutoff

Sep 30, 2025(7 months ago)

API release

Aug 26, 2025(8 months ago)

Not enough benchmark coverage yet for an Intelligence Index — needs at least 3 results across 2 categories.

Overview

Grok Code Fast 1 is a speedy and economical reasoning model that excels at agentic coding. With reasoning traces visible in the response, developers can steer Grok Code for high-quality...

History

Grok Code Fast 1 became available via the xAI API on 2025-08-26.

Training & availability

Training data has a knowledge cutoff of 2025-09-30 — information about events after that date is unlikely to appear in the model's responses. xAI has not released the underlying model weights — access is via their hosted API only.

Capabilities

Context window: 256K tokens.
Input modalities: text.

Recommended for: long-context.

Limitations

Text-only — cannot process images, audio, or video inputs.

Pricing

Input: $0.2000 per 1M tokens
Output: $1.5000 per 1M tokens

Use the cost calculator above to estimate monthly spend for your workload.

Quick start

Minimal example using the OpenRouter API. Copy, paste, replace the key.

from openai import OpenAI

client = OpenAI(
    base_url="https://openrouter.ai/api/v1",
    api_key="sk-or-...",
)
resp = client.chat.completions.create(
    model="xai/grok-code-fast-1",
    messages=[{"role": "user", "content": "Explain quantum computing in one sentence."}],
)
print(resp.choices[0].message.content)

Cost calculator

Estimate your monthly bill. Presets are typical workload sizes.

Input tokens / month5.0M

@ $0.2/1M

Output tokens / month2.0M

@ $1.5/1M

Input cost

5.0M × $0.2/1M

Output cost

2.0M × $1.5/1M

Total / month

$48 / year

Providers & performance

1 provider

Multi-provider inference routes for this model — sorted by throughput. Latency is time-to-first-token; throughput is output tokens per second. Data from OpenRouter, measured over the last 30 minutes.

Provider	Throughput	Latency (TTFT)	Input $ / 1M	Output $ / 1M	Context	Quant	Supports
xAI	111tok/s	4.51s	$0.2	$1.5	256K	—	tools · json

Integrations & tooling support

Tool calling: Not supported
Structured outputs: Not supported

Price vs quality

Mid-tier pricing

Standard pricing band. Quality tier pending more benchmark coverage.

Quality percentile: —
Effective price: $1.18/1M
Pricing breakdown: $0.2/1M in
$1.5/1M out

Community ratings

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