xAI · Released Sep 2, 2025Grok Code Fast 1
Fast Grok model for responsive chat, reasoning, and tool-assisted work.
- Capability
- —No ECI score yet
- Input
- $0.20per 1M tokens
- Output
- $1.50per 1M tokens
- Context
- 256K10K max output
What it costs
- Input
- $0.20per million tokens
- Output
- $1.50per million tokens
- Blended (3:1)
- $0.525cheaper than 56% of priced models
Typical monthly bills
| Monthly usage | Estimated cost |
|---|---|
| Side project2M input + 0.5M output tokens | $1.15 |
| Team assistant25M input + 5M output tokens | $12.50 |
| Production app250M input + 50M output tokens | $125.00 |
Median of 5 paid API providers on models.dev.
Independent benchmarks
Epoch AI has not published a Capabilities Index score for Grok Code Fast 1 yet.
The details
- Lab
- xAI
- Released
- Sep 2, 2025
- Context window
- 256,000 tokens
- Max output
- 10,000 tokens
- Inputs
- Text
- Output
- Text
- Reasoning
- Always on
- Tool calling
- Yes
- Structured output
- No
- Weights
- Proprietary
- Availability
- 7 API providerslisted on models.dev
More from xAI
About Grok Code Fast 1
How much does Grok Code Fast 1 cost?
Grok Code Fast 1 costs $0.20 input / $1.50 output per million tokens (median across 5 API providers). At a 3:1 input-to-output mix that is $0.525 per million tokens, cheaper than 56% of the 445 priced models we track.
What is the context window of Grok Code Fast 1?
Grok Code Fast 1 accepts up to 256,000 tokens per request and can write up to 10,000 tokens in one response.
How good is Grok Code Fast 1?
Epoch AI has not published a Capabilities Index score for Grok Code Fast 1 yet.
Is Grok Code Fast 1 open source?
No. Grok Code Fast 1 is proprietary; you use it through an API or partner platforms.
What inputs does Grok Code Fast 1 support?
Grok Code Fast 1 accepts text and replies in text. It is a reasoning model, supports tool calling.
When was Grok Code Fast 1 released?
xAI released Grok Code Fast 1 on Sep 2, 2025.
What are the best alternatives to Grok Code Fast 1?
The closest current models from other labs on capability, price and release date are Qwen3-VL Plus (Alibaba (Qwen), $0.20 / $1.60), Codestral 25.08 (Mistral AI, $0.30 / $0.90), ERNIE 4.5 300B A47B (Baidu, $0.28 / $1.10) and GLM-4.5-Air (Z.ai (Zhipu), $0.20 / $1.10).