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.
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API pricing
Under 200K input tokens
- 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
At least 200K input tokens
- 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.
USD per 1M tokensEvery price here is for one million tokens. A token is roughly three-quarters of a word, so a million tokens is about 750,000 words of text.Model mappingVerified August 18, 2026Read from docs.x.ai. Click the check to open the source.
Benchmarks
SWE-Bench VerifiedCoding — 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.
70.8%
via BenchLM
#38 of 57Best: Claude Opus 5 · 96%
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.