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API Provider13 active models1 organization

xAI: API pricing, speed & models

xAI hosts 13 active AI models, with input pricing from $0.20 per 1M tokens, with median throughput of 50 characters/sec, and P95 time to first token of 2.45s, with 100% success rate over 7 days. Compare xAI's API speed, pricing, and reliability against other inference providers.

Image generationAudioVideoFirst-party only
Median throughput50 c/s
Median TTFT2.45s
P95 TTFT2.45s
Success rate (7d)100%
From$0.20 /M tok

Catalog

Type
Price
40 models
Model
Grok 4.7cache pricing
Grok 4.7cache pricing
Grok 4.6cache pricing
Grok 4.6cache pricing
Grok 4.5cache pricing · 80 QPS
Grok 4.5cache pricing · 80 QPS
Grok-3100 QPS
Grok-3100 QPS
At a glance

xAIpricing, performance & catalog

The citable facts about xAI's 13 models — sourced from provider APIs and refreshed continuously.

Lowest price
Grok-4 Fast Reasoning at $0.200 per 1M input tokens
Highest median throughput
Grok-4.1 Fast Reasoning at 50 chars/s
Lowest median TTFT
Grok-4.1 Fast Reasoning at 2.45s
Largest context
Grok-4 Fast Reasoning at 2.0M tokens
Catalog
13 active models from 1 organization

Fastest median throughput

  1. 1Grok-4.1 Fast Reasoning50 c/s

FAQ

Common questions about xAI.

What is xAI?

xAI is an API provider that hosts large language models. Active models: 13; From (input): $0.20 / 1M tok; Median throughput: 50 c/s; Median TTFT: 2.45s; Success rate (7d): 100%.

How many models does xAI offer?

xAI currently serves 13 active models out of 25 historical offerings on LLM Stats.

What is xAI's API pricing?

xAI input pricing starts from $0.20 per 1M tokens, with the most expensive offering at $3 per 1M tokens. See the Pricing tab above for the full per-model breakdown.

How fast is xAI?

xAI delivers a median throughput of 50 characters per second and P95 time to first token of 2.45s across its model catalog. See the Models tab for per-model throughput and TTFT breakdowns.

Is xAI reliable?

xAI has a 100% success rate across 1 API calls in the last 7 days, with a 0% error rate.

Does xAI support function calling?

Yes. 16 of 13 models on xAI support function calling (tool use). The Capabilities tab lists which specific models accept tool definitions.

Does xAI support JSON mode and structured output?

Yes. 16 of 13 models on xAI support structured output (JSON mode / schema-constrained generation). The Capabilities tab shows which specific models accept response_format or json_schema parameters.

Does xAI offer batch inference?

Yes. 4 of 13 models on xAI support batch inference for cheaper, asynchronous workloads.

Does xAI support multimodal models?

Yes. xAI's catalog includes 16 vision-capable, 6 image generation, 6 audio, and 12 video models. See the Models and Capabilities tabs for the full per-model breakdown.

Whose models does xAI host?

xAI hosts models from xAI. See the Models tab for the full catalog grouped by creator.

How do I start using xAI?

Sign up at https://docs.x.ai to get an API key, then call xAI's API directly from your application. Most clients work out of the box by pointing the OpenAI SDK at xAI's base URL with your key. Use the Models and Pricing tabs above to pick the right model for your latency, cost, and context-window requirements.