# Grok Code Fast 1

Grok Code Fast 1 is an AI model released by SpaceXAI on Aug 28 2025. At release it scored 70.8% on SWE-Bench Verified.

## Facts

| Field | Value |
| --- | --- |
| Model | Grok Code Fast 1 |
| Developer | SpaceXAI |
| Release date | Thursday, Aug 28 2025 |
| Licensing | Proprietary |

## API pricing

All rates in USD per 1,000,000 tokens, pay-as-you-go.

| Tier | Input | Cached input | Output |
| --- | --- | --- | --- |
| Under 200K input tokens | $1.00 | $0.20 | $2.00 |
| At least 200K input tokens | $2.00 | $0.40 | $4.00 |

Verified August 18, 2026 against the first-party source: https://docs.x.ai/developers/pricing

## Benchmark scores published at release

| Benchmark | Score | Source | What it measures |
| --- | --- | --- | --- |
| SWE-Bench Verified | 70.8% | [BenchLM](https://benchlm.ai), retrieved 2026-08-31 | Real coding tasks pulled from open-source projects — the AI has to find and fix actual bugs. A human-checked version of the original SWE-Bench. Higher is better. |

## Questions and answers

### When was Grok Code Fast 1 released?

Grok Code Fast 1 was released by SpaceXAI on Thursday, Aug 28 2025.

### Who made Grok Code Fast 1?

Grok Code Fast 1 was built by SpaceXAI. Elon Musk's AI company building the Grok series of models. Founded in 2023 as xAI, now part of SpaceX. Cursor (Anysphere) and its Composer coding models were acquired in 2026 and are tracked here.

### How much does Grok Code Fast 1 cost?

Grok Code Fast 1 costs $1.00 per million input tokens and $2.00 per million output tokens through the SpaceXAI API. Cached input is $0.20 per million tokens. Those are the rates for the “Under 200K input tokens” tier; 1 other pricing tier is published for this model. Rates are pay-as-you-go API prices verified against SpaceXAI's published pricing on August 18, 2026.

### What benchmark scores did Grok Code Fast 1 get?

Grok Code Fast 1 reports 1 tracked benchmark score — SWE-Bench Verified: 70.8%. Scores are the figures published at release by SpaceXAI.

### Is Grok Code Fast 1 open source?

No. Grok Code Fast 1 is a proprietary model. The weights are not published — it is available only through the provider's own API, apps, or partner platforms.

### What came before and after Grok Code Fast 1?

SpaceXAI's previous tracked release was Grok 2.5 on Aug 23 2025, 5 days earlier. It was followed by Grok 4 Fast on Sep 19 2025.


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Canonical page: https://aireleasetracker.com/model/xai/grok-code-fast-1
Full dataset: https://aireleasetracker.com/llms-full.txt · JSON: https://aireleasetracker.com/models.json
Source: AI Release Tracker (https://aireleasetracker.com). Benchmark scores are the figures published by the releasing lab at launch.