---
title: "Grok 4.20 Beta for OpenClaw: Pricing, Setup, and What It's Good At"
description: "Everything you need to know about using Grok 4.20 Beta with OpenClaw. Costs $2.00/M input, $6.00/M output. 2M context window. Here's when to use it and when to pick something else."
date: 2026-03-12
updatedDate: 2026-03-12
image: /images/models/provider-xai-hero.jpg
keywords: "grok 4.20 beta openclaw, grok 4.20 beta pricing, grok 4.20 beta review, xai openclaw, grok 4.20 beta api"
category: model-guide
modelData:
  provider: "xAI"
  provider_slug: "xai"
  full_id: "xai/grok-4.20-beta"
  input_cost_per_1m: 2
  output_cost_per_1m: 6
  max_input_tokens: 2000000
  max_output_tokens: 131072
  features: ["function_calling", "vision", "reasoning", "web_search"]
  parameter_count: null
  architecture: null
  license: null
faq:
  - question: "What is the cost for a full 2M token context window?"
    answer: "A full input window costs $4.00, while output tokens are billed at $6.00 per million."
  - question: "Does it support vision and tools?"
    answer: "It includes native function calling and vision capabilities, making it compatible with most OpenClaw agent workflows."
---

Current as of March 2026. Grok 4.20 Beta is xAI's play for the high-context market, offering a massive 2M token window at a fraction of the cost of flagship models. It is built for developers who need to ingest entire repositories without breaking the bank.

## Specs

| | |
|---|---|
| **Provider** | xAI |
| **Input cost** | $2.00 / M tokens |
| **Output cost** | $6.00 / M tokens |
| **Context window** | 2M tokens |
| **Max output** | N/A tokens |
| **Parameters** | N/A |
| **Features** | function_calling, vision, reasoning, web_search |

## What it's good at

#### Massive Context Window

The 2M token capacity allows for processing massive datasets or entire codebases in a single prompt.

#### Aggressive Pricing

At $2 per million input tokens, it competes with mini models while offering significantly higher limits.

## Where it falls short

#### Beta Instability

Expect occasional inconsistencies in reasoning and output formatting during this beta phase.

#### Proprietary Black Box

Zero transparency regarding architecture or training data makes it difficult to predict edge-case failures.

## Best use cases with OpenClaw

- **Large-scale codebase auditing** — You can dump 1.5M tokens of source code into a single request for global analysis.
- **Bulk data extraction** — The $6 per million output cost makes high-volume transformation tasks economically viable.

## Not ideal for

- **Production-critical logic** — The Beta tag implies reliability can fluctuate during rapid update cycles.
- **Latency-sensitive UI features** — Reasoning overhead on large contexts can lead to unpredictable time-to-first-token.

## OpenClaw setup

Use the OpenAI-compatible provider setting with the base URL api.x.ai/v1 and your xAI API key. Set high timeout values to accommodate the processing time required for 2M token windows.

```json
{
  "models": {
    "mode": "merge",
    "providers": {
      "xai": {
        "baseUrl": "https://api.x.ai/v1",
        "apiKey": "YOUR-XAI-API-KEY",
        "api": "openai-completions",
        "models": [
          {
            "id": "grok-4.20-beta",
            "name": "Grok 4.20 Beta",
            "cost": {
              "input": 2,
              "output": 6
            },
            "contextWindow": 2000000,
            "maxTokens": null
          }
        ]
      }
    }
  }
}
```

## How it compares

- **vs GPT-4o-mini** — Grok 4.20 Beta offers 15 times the context window at 2M tokens versus 128k for a similar price tier.
- **vs [Claude 3.5 Sonnet](/blog/claude-3-5-sonnet-openclaw)** — Sonnet has superior reasoning but costs $3 per million input and is limited to a 200k context window.

## Bottom line

It is a context-first model that is hard to beat for bulk processing if you can tolerate the occasional beta-related quirk.

<a href="https://app.haimaker.ai/sign-up?utm_source=model_guide&utm_medium=cta&utm_campaign=grok-4-20-beta-openclaw" class="cta-button">TRY GROK 4.20 BETA ON HAIMAKER</a>

---

*For setup instructions, see our [API key guide](/blog/openclaw-api-key-setup). For all available models, see the [complete models guide](/blog/best-models-for-openclaw).*