Grok 4 Fast API Pricing 2026

Compare pricing, benchmarks, and providers for Grok 4 Fast. Find the best value for your use case.

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Last updated: January 22, 2026 at 08:06 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

Output127 tok/s

TTFT0.52s

median latency

Capabilities

VisionToolsCaching

Pricing Comparison

Compare Grok 4 Fast with 10 similar models by price.

Current Pricing (per 1M tokens)

11 models

Provider	Model	Input $/M	Output $/M	Coding	MMLU	GPQA	Context	Actions
X Xai	Grok 4 Fast	$0.200	$0.500	40.1	73.0	60.6	2,000,000	Try
M Meta-llama	Llama Guard 4 12B	$0.180	$0.180	—	—	—	163,840	Try
QW Qwen	Qwen3 VL 8B Thinking	$0.180	$2.100	—	—	—	256,000	Try
DS Deepseek	DeepSeek V3 0324	$0.190	$0.870	35.9	75.2	55.7	163,840	Try
M Meituan	LongCat Flash Chat	$0.200	$0.800	—	—	—	131,072	Try
MI Mistral AI	Saba	$0.200	$0.600	—	61.1	42.4	32,768	Try
A Allenai	Olmo 3.1 32B Instruct	$0.200	$0.600	—	—	53.9	65,536	Try
P Prime-intellect	INTELLECT-3	$0.200	$1.100	—	—	—	131,072	Try
MI Mistral AI	Ministral 3 14B 2512	$0.200	$0.200	35.1	69.3	57.2	262,144	Try
X Xai	Grok 4.1 Fast	$0.200	$0.500	39.9	74.3	63.7	2,000,000	Try
NV Nvidia	Nemotron Nano 12B 2 VL	$0.200	$0.600	34.5	64.9	43.9	131,072	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.

Providers

$0.200

Cheapest Input/M

$0.500

Cheapest Output/M

xAI

Best Price

Provider Pricing

1 models

Provider	Input $/M	Output $/M	Uptime
xAI Best Price	$0.200	$0.500	100.0%

Provider pricing data sourced from OpenRouter and Helicone

Cost vs. Quality

Compare Grok 4 Fast's benchmark performance against all models.

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Grok 4 Fast

Grok 4 Fast (Thinking)

Other models

Detailed Benchmark Scores

Benchmark	Standard	Thinking
Intelligence	22.9 (58th)	34.8 (74th)
Coding	19.0 (57th)	27.4 (55th)
Math	41.3 (42th)	89.7 (74th)
MMLU Pro	73.0 (39th)	85.0 (68th)
GPQA	60.6 (50th)	84.7 (87th)
LiveCodeBench	40.1 (43th)	83.2 (84th)
AIME	-	-
Aider	-	-

Benchmark data from Artificial Analysis and HuggingFace Open LLM Leaderboard

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Frequently Asked Questions

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