Grok 4.20 (Reasoning)
Reasoning variant of Grok 4.20, released March 2026, built on a multi-agent architecture in which several agents work in parallel and cross-check answers, aimed at agentic tool calling.
- Input
- $1.25 / 1M tokens
- Output
- $2.50 / 1M tokens
About $17.50 for 10M input and 2M output tokens. Estimate yours
1 provider
Key Specifications
- Context window
- 1M tokens
- Inputs
- Text, Image Outputs: Text
Grok 4.20 (Reasoning) pricing by provider
| Provider | Input / 1M tokens | Output / 1M tokens | Cost at 10M in + 2M out | |
|---|---|---|---|---|
|
xAI
Creator
|
$1.25 | $2.50 | $17.50 | View |
Heads up: We do our best to keep these specs & prices accurate. However, cloud costs may fluctuate based on region, usage, and other factors not listed here. These are estimates based on common setups and are for informational purposes only. Always verify current rates & exact specs with the provider before provisioning. LLM rates are base-tier, on-demand prices per 1M tokens; cached-input, batch and long-context tiers are not included.
Compare every model at this volume in the LLM cost calculator.
Capabilities
Function calling
Connect to external tools, APIs, and systems.
Structured output
Return responses in structured formats like JSON.
More from xAI
| Model | Context | Input / 1M | Output / 1M |
|---|---|---|---|
|
Grok 4.20 (Non-Reasoning)
|
1M | $1.25 | $2.50 |
|
Grok 4.3
|
1M | $1.25 | $2.50 |
|
Grok Build 0.1
|
256K | $1.00 | $2.00 |
|
Grok 4.5
|
500K | $2.00 | $6.00 |
|
Grok 4.6
|
500K | $2.00 | $6.00 |
|
Grok 4.1 Fast (Non-Reasoning)
|
2M | ||
|
Grok 4.1 Fast (Reasoning)
|
2M | ||
|
Grok 4
|
256K | ||
Models near this price
The models nearest this one by input rate, five each way, at each one's cheapest listed provider.
Frequently Asked Questions
How much does Grok 4.20 (Reasoning) cost?
Grok 4.20 (Reasoning) costs $1.25 per 1M input tokens and $2.50 per 1M output tokens via xAI.
What does Grok 4.20 (Reasoning) cost for 10M input and 2M output tokens?
At xAI's rates, 10M input tokens and 2M output tokens cost about $17.50: $12.50 for input and $5.00 for output. Input is prompts and context, output is what the model writes back; a workload that generates more than it reads shifts the cost toward the output rate of $2.50 per 1M tokens.
Which providers offer Grok 4.20 (Reasoning)?
One provider lists Grok 4.20 (Reasoning): xAI ($1.25 in / $2.50 out).
What is Grok 4.20 (Reasoning)'s context window?
Grok 4.20 (Reasoning) accepts up to 1M tokens of input per request. The context window is the prompt plus any documents, conversation history and tool results sent with it; every token in it is billed at the input rate.
What inputs and outputs does Grok 4.20 (Reasoning) support?
Grok 4.20 (Reasoning) accepts text and images as input and produces text. Its listed capabilities are function calling and structured output.
How does Grok 4.20 (Reasoning) compare with Grok 4.20 (Non-Reasoning)?
Grok 4.20 (Reasoning) and Grok 4.20 (Non-Reasoning) both cost $1.25 per 1M input tokens ($2.50 vs $2.50 per 1M output tokens). Both have a 1M-token context window.
What are cheaper alternatives to Grok 4.20 (Reasoning)?
Models from other creators with a lower input rate and at least Grok 4.20 (Reasoning)'s 1M-token context window: Qwen3-Coder-Plus at $1.00 per 1M input tokens (1M context), GLM-5.2 at $0.90 per 1M input tokens (1M context) and Nemotron 3 Ultra 550B A55B at $0.60 per 1M input tokens (1M context). Rates are the cheapest listed provider for each; whether the quality holds for a given task is a separate question.
Cheaper alternatives to Grok 4.20 (Reasoning)
Qwen3-Coder-Plus
$1.00 per 1M input tokens and $5.00 per 1M output tokens via Alibaba Cloud, 1M-token context, by Alibaba Cloud.
GLM-5.2
$0.90 per 1M input tokens and $2.80 per 1M output tokens via Geodd, 1M-token context, by Z.AI.
Nemotron 3 Ultra 550B A55B
$0.60 per 1M input tokens and $3.60 per 1M output tokens via Together, 1M-token context, by Nvidia.