# Grok 4.20 Non-Reasoning

Grok 4.20 Non-Reasoning delivers direct responses optimized for speed, with low hallucination rates and strict prompt adherence across agentic and general-purpose tasks.

- **Model ID:** `spacexai/grok-4.20-non-reasoning`
- **Type:** chat
- **Providers:** xai, vertex
- **Context window:** 2,000,000
- **Maximum output tokens:** 2,000,000
- **Pricing:** $1.25/1M input tokens, $2.5/1M output tokens
- **Canonical page:** https://vercel.com/ai-gateway/models/grok-4.20-non-reasoning

## Supported parameters

Detailed capability metadata has not been reported for this model.

## Example

```ts
import { streamText } from 'ai'

const result = streamText({
  model: 'spacexai/grok-4.20-non-reasoning',
  prompt: 'Why is the sky blue?'
})
```

## About

Grok 4.20 Non-Reasoning was released March 10, 2026 as part of SpaceXAI's Grok 4.20 beta generation. It's optimized for speed and direct responses, producing answers without chain-of-thought reasoning overhead. The model features low hallucination rates and strict prompt adherence, making it suitable for production workloads that need precise, reliable output.

As a non-reasoning variant, Grok 4.20 Non-Reasoning skips intermediate reasoning traces and delivers answers directly. This reduces latency and output token cost per request, which is particularly valuable in high-throughput applications and agentic tool-calling loops where per-step speed compounds into overall workflow efficiency.

This model is currently in beta.

## What to consider

Grok 4.20 Non-Reasoning is in beta. Expect potential changes to behavior, pricing, or availability before general availability.

This variant produces direct answers. If you need the model to reason through complex problems step by step, use the Grok 4.20 Reasoning variant instead.

## When to use

### Best For

- **High-throughput production APIs** where direct, precise answers at low latency serve end users best
- **Agentic tool-calling workflows** that benefit from fast decision-making with low hallucination rates
- **Classification and routing pipelines** that need reliable, prompt-adherent output for downstream processing
- **Chat and conversational interfaces** where users expect fast, accurate responses
- **Content generation tasks** where strict prompt adherence matters more than deep reasoning

### Consider Alternatives When

- **Complex analytical tasks** requiring multi-step reasoning. Use the Grok 4.20 Reasoning variant
- **Multi-agent orchestration** where the Grok 4.20 Multi-Agent variant is purpose-built for agent collaboration
- **Stable production deployments** where beta models introduce unwanted risk. Use Grok 4.1 Fast Non-Reasoning instead
- **Maximum cost efficiency on simple tasks** where Grok 3 Mini Fast offers lower per-token costs

## Best for

- **High-throughput production APIs:** direct, precise answers at low latency serve end users best
- **Agentic tool-calling workflows** that benefit from fast decision-making with low hallucination rates
- **Classification and routing pipelines** that need reliable, prompt-adherent output for downstream processing
- **Chat and conversational interfaces:** low-hallucination, prompt-adherent responses arrive quickly without chain-of-thought overhead
- **Content generation tasks** where strict prompt adherence matters more than deep reasoning

## Consider alternatives

- **Complex analytical tasks** requiring multi-step reasoning. Use the Grok 4.20 Reasoning variant
- **Multi-agent orchestration:** the Grok 4.20 Multi-Agent variant is purpose-built for agent collaboration
- **Stable production deployments:** beta models introduce unwanted risk. Use Grok 4.1 Fast Non-Reasoning instead
- **Maximum cost efficiency on simple tasks:** Grok 3 Mini Fast offers lower per-token costs

## Frequently asked questions

### What does 'non-reasoning' mean for Grok 4.20 Non-Reasoning?

The model produces direct answers without generating chain-of-thought reasoning traces. This reduces latency and output token cost compared to the reasoning variant.

### What is the context window for Grok 4.20 Non-Reasoning?

2M tokens.

### Is Grok 4.20 Non-Reasoning in beta?

Yes. Grok 4.20 Non-Reasoning is currently in beta. Behavior, pricing, or availability may change before general availability.

### What does Grok 4.20 Non-Reasoning cost?

Pricing appears on this page and updates as providers adjust their rates. AI Gateway routes traffic through the configured provider.

### How do I authenticate with Grok 4.20 Non-Reasoning through Vercel AI Gateway?

Use your Vercel AI Gateway API key with `spacexai/grok-4.20-non-reasoning` as the model identifier. No separate SpaceXAI account is needed for gateway-managed access.

### How does Grok 4.20 Non-Reasoning compare to Grok 4.1 Fast Non-Reasoning?

Grok 4.20 Non-Reasoning is the newer generation with improved hallucination rates and prompt adherence. Grok 4.1 Fast Non-Reasoning is a stable, generally available alternative if you prefer to avoid beta models.

### Does Vercel AI Gateway support Zero Data Retention for Grok 4.20 Non-Reasoning?

Yes, Zero Data Retention is available for this model. Zero Data Retention is offered on a per-provider basis. See https://vercel.com/docs/ai-gateway/capabilities/zdr for details.

## Links

- [Model page](https://vercel.com/ai-gateway/models/grok-4.20-non-reasoning)
- [AI Gateway documentation](https://vercel.com/docs/ai-gateway)
- [Provider model documentation](https://docs.x.ai/developers/models/grok-4.20-beta-0309-non-reasoning)
- [Provider pricing](https://docs.x.ai/developers/models)