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xAIGrok 4Arena #61Jul 9, 2025

Grok 4 Fast Reasoning

Grok 4 Fast is xAI's latest multimodal model with SOTA cost-efficiency and a 2M token context window. It comes in two flavors: non-reasoning and reasoning.

Context Window
2.0M
tokens
Max Output
256K
tokens
Released
Jul 9, 2025
Arena Rank
#61
of 305 models
Output Speed
185
tokens/sec
Time to First Token
450ms
TTFT

Capabilities

👁Vision
🧠Reasoning
🔧Tool Calling
⚡Prompt Caching
🖥Computer Use
🎨Image Generation

Pricing Comparison

RouterInput / 1MOutput / 1MCached Input / 1M
Vercel AI$0.20$0.50—
Martian$0.20$0.50—

Benchmarks

Artificial Analysis
Intelligence IndexArtificial Analysis
68/100
Coding IndexArtificial Analysis
62/100
Math IndexArtificial Analysis
72/100
MMLU-PROArtificial Analysis
0.778/1
GPQA DiamondArtificial Analysis
0.695/1
MATH-500Artificial Analysis
0.888/1
AIME 2024Artificial Analysis
0.48/1
Humanity's Last ExamArtificial Analysis
0.06/1
LiveCodeBenchArtificial Analysis
0.605/1
SciCodeArtificial Analysis
0.32/1

Model IDs

Tags

reasoningtool-useimplicit-caching
Compare with another model

Compare with…

Grok 4 FastGrok 4 Fast Non ReasoningGrok 4 1 Fast Reasoning

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Ranked by provider, pricing, capabilities, and arena performance

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xAI: Grok 4.1 Fast

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