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Grok 4.20 (Reasoning)

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.

Context: 1M tokens
Released: Mar 2026

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Hosted API price

List price via xAI · per 1M tokens

USD

Input: $1.25 /1M
Output: $2.50 /1M
Hosted by: 1 provider

Hosted API pricing

How we price

Order

Providers are listed cheapest input rate first, then by output rate, a tie going to the creator's own listing. A provider that lists the model without a published rate sits at the end.

Prices

Base-tier, on-demand rates in USD per 1M tokens, converted at ECB reference rates where a provider publishes in another currency. Cached-input and batch rates show only where a provider publishes them. "Cheapest" marks the one provider with the lowest input and output pair; a tie wears no badge.

Cost

Input rate times the input tokens plus output rate times the output tokens, at the monthly volume set above the table. Cached-input, batch, long-context and reasoning-token billing are not modelled.

Transparency and funding

Affiliates: Affiliate links are marked. We may earn a commission if you click them, but commissions never affect the order.

Every provider serving Grok 4.20 (Reasoning), cheapest input first. Set your monthly volume to see what each would bill.

Input M Output M

Every provider serving Grok 4.20 (Reasoning), with its price per 1M input and output tokens and what the volume above would cost
Provider	Input /1M	Output /1M	Cached input /1M	Cost at 10M in + 2M out	Link
xAI Creator	$1.25	$2.50	$0.20	$17.50	Visit website

Heads up: Base-tier, on-demand rates per 1M tokens; cached, batch and long-context tiers excluded. A provider may serve a shorter context or a quantized build than the creator's release. Verify before provisioning. More on how we price.

Similarly priced models

The models nearest Grok 4.20 (Reasoning) by blended rate, each at its own cheapest provider.

Models priced nearest Grok 4.20 (Reasoning) per 1M tokens, each at its cheapest provider
Model	Blended /1M	Input /1M	Output /1M	Context	Cutoff	vs Grok 4.20 (Reasoning)
Gemini 3.8 Flash Google Cloud	$1.25	$0.75	$3.75	1M	Mar 2026	−14%
Qwen3-Max Alibaba Cloud	$1.2717	$0.85	$3.38	262K		−13%
GPT-5.4 Mini OpenAI	$1.375	$0.75	$4.50	400K	Aug 2025	−6%
Kimi K2.7 Code Moonshot AI	$1.375	$0.90	$3.75	262K		−6%
Grok 4.20 (Non-Reasoning) xAI	$1.4583	$1.25	$2.50	1M		0%
Grok 4.20 (Reasoning) This model xAI	$1.4583	$1.25	$2.50	1M
Grok 4.3 xAI	$1.4583	$1.25	$2.50	1M		0%
o4-mini OpenAI	$1.50	$1.00	$4.00	200K	Jun 2024	+3%
o3-mini OpenAI	$1.65	$1.10	$4.40	200K	Oct 2023	+13%
Claude Haiku 4.5 Anthropic	$1.6667	$1.00	$5.00	200K	Feb 2025	+14%
GLM-5-Turbo Z.AI	$1.6667	$1.20	$4.00	205K		+14%

USD per 1M tokens at each model's cheapest listed provider. Blended is the cost of 10M input plus 2M output tokens, spread over the 12M.

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Capabilities

What Grok 4.20 (Reasoning) accepts and can do, as published by xAI.

Text Accepts and generates natural-language text.
Image Accepts images as input alongside text.
Reasoning Thinks before it answers, always on or as a switchable mode.
Function calling Connect to external tools, APIs, and systems.
Structured output Return responses in structured formats like JSON.
Web search Search the web for up-to-date information.
Code execution Write and execute code in a sandboxed environment.
File upload Process uploaded documents, spreadsheets, and other files.

Common questions

What is Grok 4.20 (Reasoning) good for?

Multi-step agent tool calling, with several agents working in parallel and cross-checking answers, xAI says. It takes text, images and document attachments, in the middle of xAI's price range.

When is Grok 4.20 (Reasoning) not a good fit?

Calls that do not need a reasoning step, which the non-reasoning variant covers on the same weights. xAI charges a higher rate for prompts of 200K tokens or more, and closed weights rule out self-hosting.

What is the cheapest way to run Grok 4.20 (Reasoning)?

The cheapest hosted rate is $1.25 / $2.50 per 1M tokens via xAI.

Can I self-host Grok 4.20 (Reasoning)?

No. xAI does not publish the weights; Grok 4.20 (Reasoning) is available only through hosted APIs.