Grok 4 Fast (Non-reasoning)
SpaceXAIGrokProprietary
Description
Grok 4 Fast is a high-speed variant of Grok-4, optimized for faster inference while maintaining strong reasoning capabilities. It offers improved throughput and lower latency compared to the standard Grok-4 model.
Release Date
2025-09-19
Parameters
—
Context Length
—
Modalities
image, text
Capability Radar
29
general
40
coding
45
reasoning
43
science
40
agents
80
multimodal
Rankings
| Domain | #Rank | Score | Source |
|---|---|---|---|
| Code Ranking | 425 | 30.0 | AA |
| General Ranking | 310 | 42.0 | AA |
| Science | 433 | 33.0 | AA |
Benchmark Scores (LLM Stats)
(LLM Stats (zeroeval))Factuality
SimpleQA
95.0%SR
Math
HMMT 2025
93.3%SR
AIME 2025
92.0%SR
Reasoning
GPQANYU + Cohere + Anthropic (2023)
85.7%SR
LiveCodeBench
80.0%SR
BrowseCompOpenAI (2025)
44.9%SR
Humanity's Last Exam
20.0%SR
AA Evaluation Indices
(Artificial Analysis)Mmlu Pro(TIGER-Lab (Univ. of Waterloo, Toronto, CMU, 2024))73.0
Tau2(Sierra + U Toronto + Vector Institute (2025))63.7
Gpqa(NYU + Cohere + Anthropic (2023))60.6
Aime 25(MAA (Mathematical Association of America))41.3
Math Index(Artificial Analysis)41.3
Livecodebench(UC Berkeley + MIT + Cornell (2024))40.1
Ifbench(Google Research (2023))37.7
Lcr(Artificial Analysis)24.0
Terminalbench Hard(Stanford × Laude Institute (2026))12.1
Intelligence Index(Artificial Analysis)11.1
Hle(Center for AI Safety + Scale AI (2025))4.5
LLM Stats Category Scores
(LLM Stats (zeroeval))Physics90
Factuality90
Biology90
Chemistry90
Code80
Math70
Reasoning70
General70
Search40
Agents40
Vision20
Pricing
Input Price$0.2 / 1M tokens
Output Price$0.5 / 1M tokens
Blended Price (3:1)$0.275 / 1M tokens
Speed
Tokens/sec0.0
Time to First Token0.00s
Time to Answer0.00s
Provider Price Ranking
Provider Price Ranking
1 providers
ProviderInputOutput
1SpaceXAIPRIMARY
$0.2
$0.5
Compare pricing across different API providers for this model.