Grok 4 Fast by xAI demonstrates strong general intelligence, competitive pricing. View detailed benchmark data including scores across coding, math, reasoning, speed, and cost metrics.
General Benchmarks
Human preference ELO from blind head-to-head votes
LMSYS / HuggingFaceMassive Multitask Language Understanding professional benchmark
HuggingFace LeaderboardCoding Benchmarks
Human preference ELO for building things — websites, UI, games, charts, SVG
Design Arena (via OpenRouter)Human preference ELO for building a working web page from a brief
Design Arena (via OpenRouter)Math Benchmarks
Reasoning Benchmarks
Speed Benchmarks
Cost Benchmarks
Context Benchmarks
Available from 2 providers
The same model costs different amounts depending on who serves it.
| Provider | Input / 1M | Output / 1M | Cached in | Context | Your key |
|---|---|---|---|---|---|
| Abacus | $0.2 | $0.5 | — | 2.0M | — |
| ZenMux | $0.2 | $0.5 | $0.05 | 2.0M | — |
Grok 4 Fast — Benchmark Scores Overview
Scores normalized to percentage scale for visual comparison. ELO scores mapped to 0-100 range (1100-1500).
Compare Grok 4 Fast With
Grok 4 Fast — Frequently Asked Questions
How intelligent is Grok 4 Fast?
Grok 4 Fast scores 1370 on the Chatbot Arena ELO rating, making it a high-performing AI model. This score is based on blind head-to-head human preference voting.
How much does Grok 4 Fast cost?
Grok 4 Fast costs $0.20 per 1M input tokens and $0.50 per 1M output tokens. This makes it one of the more affordable models.
How fast is Grok 4 Fast?
Grok 4 Fast generates output at 110 tokens per second, which is moderate compared to other models. The time to first token is 220 ms.
How good is Grok 4 Fast at coding?
Grok 4 Fast achieves 48.0% on SWE-bench Verified, demonstrating moderate real-world software engineering capability. This benchmark tests the model's ability to resolve actual GitHub issues.
How good is Grok 4 Fast at math and reasoning?
Grok 4 Fast scores 84.0% on the MATH benchmark (competition-level mathematics). It also achieves 60.0% on GPQA Diamond, a graduate-level science reasoning benchmark.
What is the context window of Grok 4 Fast?
Grok 4 Fast has a context window of 256K tokens. This determines how much text, conversation history, and code the model can process in a single request.
Who created Grok 4 Fast?
Grok 4 Fast was created by xAI. It is classified as a mid model in our catalogue.
Is Grok 4 Fast open source?
No, Grok 4 Fast is a proprietary model. It is available through xAI's API and compatible providers.