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Grok 4 Fast API Pricing 2026

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Last updated: May 10, 2026 at 08:29 AM

Overview

Grok 4 Fast was released on September 19, 2025. Pricing starts at $0.200 per million input tokens and $0.500 per million output tokens. The model supports a context window of up to 2.0M tokens. API access is available through Xai.

Context Window
2.0M
tokens
Pricing
Input$0.200
Output$0.500
Cached$0.050
per 1M tokens
Speed
Output82 tok/s
TTFT0.39s
median latency
Capabilities
VisionReasoningToolsCaching

Pricing Comparison

Compare Grok 4 Fast with 0 similar models by price.

Current Pricing (per 1M tokens)

1 models

Provider
Model
Input $/M
Output $/M
Coding
MMLU
GPQA
Context
Actions
$0.200
$0.500
40.1
73.0
60.6
2,000,000
Try

* Some models use tiered pricing based on prompt length. Displayed prices are for prompts ≤ 200k tokens.

Compare Providers

Grok 4 Fast is available from multiple providers with different pricing and availability.

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Community Rankings

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Cost vs. Quality

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Grok 4 Fast
Grok 4 Fast (Thinking)
Other models

Detailed Benchmark Scores

BenchmarkStandard Thinking
Intelligence23.1 (55th) 35.1 (69th)
Coding19.0 (51th) 27.4 (58th)
Math41.3 (43th) 89.7 (78th)
MMLU Pro73.0 (45th) 85.0 (74th)
GPQA60.6 (48th) 84.7 (85th)
LiveCodeBench40.1 (47th) 83.2 (87th)
AIME--
Aider--
Benchmark data from Artificial Analysis and HuggingFace Open LLM Leaderboard

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Frequently Asked Questions

Grok 4 Fast costs $0.000200 per 1,000 input tokens and $0.000500 per 1,000 output tokens.

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