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xAI: X-Ai/Grok-4-Fast-Non-Reasoning

Fast Grok model for responsive chat, reasoning, and tool-assisted work

Source-linked grok Closed weights Released 2025-12-18
API record Report
InputT
OutputT
Input price$0.2/M
Output price$0.5/M
Context2M
Max output2M
Providers3
Inference availability

Providers

Provider-specific identifiers, limits, and listed prices per million tokens. Every row links back to the provider's own documentation.

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Providers offering X-Ai/Grok-4-Fast-Non-Reasoning
ProviderProvider model IDContextMax outputInputOutputCache readCapabilitiesDocs
Qiniu x-ai/grok-4-fast-non-reasoning 2M 2M — — — Tools Docs ↗
Poe xai/grok-4-fast-non-reasoning 2M 128K $0.2 $0.5 $0.05 Tools Docs ↗
Eden AI xai/grok-4-fast-non-reasoning 2M 2M $0.2 $0.5 $0.05 Tools Docs ↗

Capability badges appear only where the provider catalog explicitly lists support. A blank cell means the source is silent, not that the feature is absent.

Listed rates

Price across providers

Input price per million tokens as published by each provider. Bars are drawn from listed rates only — no traffic weighting, since the catalog observes no requests.

Lowest input $0.2/M

Across 2 priced providers

Median input $0.2/M

Midpoint of listed rates

Highest input $0.2/M

Same as the lowest listed rate

Output range $0.5 – $0.5

Per million output tokens

Poe $0.2/M
Eden AI $0.2/M
Cost calculator

Estimate a workload

$0.00
Excludes taxes, non-token charges, and tiered discounts.

2 providers list the identical $0.2 input rate, so price alone will not separate them — compare context limits, max output, and capabilities above.

Specification

Capabilities

Recorded from the source catalog and provider listings.

× Reasoning No
✓ Tool calling Yes
× Structured output No
✓ Attachments Yes
✓ Vision input Yes
× Open weights No
Creator
xAI
Model family
grok
Knowledge cutoff
Not documented
License
Not documented
Release date
2025-12-18
Model ID
xai/grok-4-fast-non-reasoning
Published evaluations

Benchmarks

Every result stays attached to its source, version, metric and harness. Scores from different versions are never merged, and the profile below plots each benchmark against its own population rather than on a shared scale.

Benchmark registry
No published benchmark results

ModelBench does not infer quality from price, context size, or model name. When a source publishes a comparable result, it appears here with its version and link.

Read the methodology
Catalog activity

Change log

Field-level changes detected between successful source imports.

Full change log
Price Prompt0.19999999999999998 → 0.2
Public API

Use this record

Fetch the complete source-linked model record. No key, no account, no rate-limited tier.

API documentation
Endpoint
GET https://modelbench.lol/api/v1/models/xai/grok-4-fast-non-reasoning
curl
curl "https://modelbench.lol/api/v1/models/xai/grok-4-fast-non-reasoning"
Common questions

Frequently asked questions

Answered directly from the stored record — nothing here is generated beyond the catalog's own fields.

What is X-Ai/Grok-4-Fast-Non-Reasoning?

Fast Grok model for responsive chat, reasoning, and tool-assisted work. It is published by xAI and catalogued here from Models.dev.

How much does X-Ai/Grok-4-Fast-Non-Reasoning cost?

Listed input pricing starts at $0.2 per million tokens from Poe.

What is the context length of X-Ai/Grok-4-Fast-Non-Reasoning?

X-Ai/Grok-4-Fast-Non-Reasoning accepts up to 2M tokens of context and returns up to 2M output tokens.

Does X-Ai/Grok-4-Fast-Non-Reasoning support tool calling and structured output?

Provider catalogs list support for tool calling, and image input.

Which providers serve X-Ai/Grok-4-Fast-Non-Reasoning?

3 providers list this model: Qiniu, Poe, Eden AI.

Are the weights for X-Ai/Grok-4-Fast-Non-Reasoning open?

No. This model is served through hosted APIs only.

When was X-Ai/Grok-4-Fast-Non-Reasoning released?

The catalog records a release date of 2025-12-18, last verified Oct 24, 2026.

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