Grok Code Fast 1
Released
Grok Code Fast 1 is an AI model released by SpaceXAI on Thursday, Aug 28 2025, 5 days after Grok 2.5. Benchmark results (shown below) cover SWE-Bench Verified.
API pricing
- InputWhat you pay for everything you send the model — your question, plus any documents or earlier conversation you include with it.
- $1.00
- Cached inputA reduced rate for text you send over and over. If every request starts with the same instructions or the same document, the provider keeps a copy ready and charges less to read it again.
- $0.20
- OutputWhat you pay for the text the model writes back. It is normally the dearer half: producing an answer costs more than reading one.
- $2.00
- InputWhat you pay for everything you send the model — your question, plus any documents or earlier conversation you include with it.
- $2.00
- Cached inputA reduced rate for text you send over and over. If every request starts with the same instructions or the same document, the provider keeps a copy ready and charges less to read it again.
- $0.40
- OutputWhat you pay for the text the model writes back. It is normally the dearer half: producing an answer costs more than reading one.
- $4.00
- Reasoning or thinking is supported.
Benchmarks
Source: BenchLM, retrieved 31 August 2026. Every other score here is the figure the lab published at launch.
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Frequently asked questions
Grok Code Fast 1 was released by SpaceXAI on Thursday, Aug 28 2025.
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.
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.
Grok Code Fast 1 reports 1 tracked benchmark score — SWE-Bench Verified: 70.8%. Scores are the figures published at release by SpaceXAI.
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.
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.