How much does Grok 4.20 cost?

Grok 4.20 costs $1.25/M input tokens and $2.50/M output tokens, with separate rates for Cache Read at $0.20/M tokens and Web Search at $5.00/1K calls.

What is the context length of Grok 4.20?

Grok 4.20 has a 2,000,000 token context window.

Does Grok 4.20 support tool calling and structured outputs?

Yes. Grok 4.20 accepts tools and tool_choice for function calling. It also supports structured outputs via a JSON schema in response_format.

What inputs and outputs does Grok 4.20 support?

Grok 4.20 accepts text, images, and files such as PDFs as input and returns text.

Which providers serve Grok 4.20?

Grok 4.20 is served by 1 provider on OpenRouter: SpaceXAI.

What other text models does SpaceXAI have?

Grok 4.7, Grok 4.6, Grok 4.5 and 3 more are other text models from SpaceXAI.

When was Grok 4.20 released?

Grok 4.20 was released on March 31, 2026. Its knowledge cutoff is September 1, 2025.

SpaceXAI: Grok 4.20

x-ai/grok-4.20

Compare

Grok 4.20 is a reasoning model from SpaceXAI with industry-leading speed and agentic tool calling capabilities. It combines the lowest hallucination rate on the market with strict prompt adherance, delivering consistently precise and truthful responses.

Reasoning can be enabled/disabled using the reasoning enabled parameter in the API. Learn more in our docs

Modalities

In / out price

$1.25 / $2.50per 1M

Context

2.0M

Released

Mar 31, 2026

Knowledge cutoff

Sep 2025

Providers

Different companies host the same model. OpenRouter routes your request to one of them based on the routing mode you pick: Balanced (price + speed), Nitro (fastest), or Floor (cheapest).

Latency / throughput


	$1.25	$2.50	$0.20	0.58s	84 tok/s	99.95%
	$1.25	$2.50	$0.20	0.51s	87 tok/s	98.07%
Not used in Standard routing:Why these endpoints are not used
Priority	$2.50	$5.00	$0.40	--	--	100.00%
Priority	$2.50	$5.00	$0.40	--	--	--

Input $1.25Output $2.50
84 tok/s99.95% uptime
Input $1.25Output $2.50
87 tok/s98.07% uptime
Not used in Standard routing:Why these endpoints are not used
Input $2.50Output $5.00
Priority
-- tok/s100.00% uptime
Input $2.50Output $5.00
Priority
-- tok/s-- uptime

Pricing

The average price customers actually pay for this model, next to the prices providers post. Caching and discounts mean the price actually paid is often well below the listed one.

Weighted average

Input

$0.6518/M tokens

Output

$2.651/M tokens

Grok 4.20 — Price history

Price history

No effective price data for this selection

		$0.570	$2.55	64.9%	10.2%
		$0.661	$2.63	58.5%	89.6%
Not used in Standard routing:Why these endpoints are not used
	Priority	$0.965	$5.00	73.1%	0.2%
	Priority	$1.700	$5.00	38.1%	0.0%

Effective in $0.570Effective out $2.55
Token share
10.2%
Effective in $0.661Effective out $2.63
Token share
89.6%
Not used in Standard routing:Why these endpoints are not used
Effective in $0.965Effective out $5.00
PriorityToken share
0.2%
Effective in $1.700Effective out $5.00
PriorityToken share
0.0%

Uptime

Uptime is the percentage of the past 3 days that at least one provider was responding to requests. Availability is the percentage of time that inference was successfully served. OpenRouter continuously monitors and uses the next-best provider when one returns an error.

Uptime (3d)

100.00%

Availability (3d)

99.86%

Availability over the last 3 days

Last 72 hours

Availability 99.86%

3 Days Ago2 Days AgoYesterdayNow

Availability over the last 24 hours

OpenRouter Availability

99.97%

When an error occurs in an upstream provider, we can recover by routing to another healthy provider, if your request filters allow it. You can access per-provider uptime data programmatically through the Endpoints API. Learn more about our load balancing and provider routing options.

Benchmarks

Scores on standardized evaluations and this model’s own outputs on shared benchmark prompts. Higher percentages are better — and each rank shows where this model lands among the models evaluated on that source.

Benchmark score summary for SpaceXAI: Grok 4.20 (Artificial Analysis and Design Arena)
Source	Benchmark	Score
Artificial Analysis	Grok 4.20 0309 (Reasoning) GPQA Diamond	88.5%
Artificial Analysis	Grok 4.20 0309 (Reasoning) HLE	32.4%
Artificial Analysis	Grok 4.20 0309 (Reasoning) IFBench	82.9%
Artificial Analysis	Grok 4.20 0309 (Reasoning) τ²-Bench Telecom	96.5%
Artificial Analysis	Grok 4.20 0309 (Reasoning) AA-LCR	67.7%
Artificial Analysis	Grok 4.20 0309 (Reasoning) CritPt	6.0%
Artificial Analysis	Grok 4.20 0309 (Reasoning) Terminal-Bench Hard	40.9%
Artificial Analysis	Grok 4.20 0309 v2 (Reasoning) GPQA Diamond	91.1%
Artificial Analysis	Grok 4.20 0309 v2 (Reasoning) HLE	34.5%
Artificial Analysis	Grok 4.20 0309 v2 (Reasoning) IFBench	81.2%
Artificial Analysis	Grok 4.20 0309 v2 (Reasoning) τ²-Bench Telecom	93.0%
Artificial Analysis	Grok 4.20 0309 v2 (Reasoning) AA-LCR	69.0%
Artificial Analysis	Grok 4.20 0309 v2 (Reasoning) CritPt	6.6%
Artificial Analysis	Grok 4.20 0309 v2 (Reasoning) Terminal-Bench Hard	37.9%
Artificial Analysis	Grok 4.20 0309 (Non-reasoning) GPQA Diamond	78.5%
Artificial Analysis	Grok 4.20 0309 (Non-reasoning) HLE	24.5%
Artificial Analysis	Grok 4.20 0309 (Non-reasoning) IFBench	47.8%
Artificial Analysis	Grok 4.20 0309 (Non-reasoning) τ²-Bench Telecom	69.6%
Artificial Analysis	Grok 4.20 0309 (Non-reasoning) AA-LCR	25.3%
Artificial Analysis	Grok 4.20 0309 (Non-reasoning) CritPt	0.0%
Artificial Analysis	Grok 4.20 0309 (Non-reasoning) Terminal-Bench Hard	22.0%
Artificial Analysis	Grok 4.20 0309 v2 (Non-reasoning) GPQA Diamond	77.6%
Artificial Analysis	Grok 4.20 0309 v2 (Non-reasoning) HLE	27.9%
Artificial Analysis	Grok 4.20 0309 v2 (Non-reasoning) IFBench	49.3%
Artificial Analysis	Grok 4.20 0309 v2 (Non-reasoning) τ²-Bench Telecom	59.9%
Artificial Analysis	Grok 4.20 0309 v2 (Non-reasoning) AA-LCR	23.3%
Artificial Analysis	Grok 4.20 0309 v2 (Non-reasoning) CritPt	0.3%
Artificial Analysis	Grok 4.20 0309 v2 (Non-reasoning) Terminal-Bench Hard	16.7%
Design Arena	Grok 4.20 Beta (Reasoning) Models Arena 3D Elo	1172
Design Arena	Grok 4.20 Beta (Reasoning) Models Arena Asciiart Elo	1170
Design Arena	Grok 4.20 Beta (Reasoning) Models Arena Code Categories Elo	1210
Design Arena	Grok 4.20 Beta (Reasoning) Models Arena Data Visualization Elo	1216
Design Arena	Grok 4.20 Beta (Reasoning) Models Arena Game Development Elo	1182
Design Arena	Grok 4.20 Beta (Reasoning) Models Arena SVG Elo	1155
Design Arena	Grok 4.20 Beta (Reasoning) Models Arena UI Component Elo	1192
Design Arena	Grok 4.20 Beta (Reasoning) Models Arena Website Elo	1220

Apps

Public apps that send the most traffic to this model. Good signal for what real production workloads look like — and a hint at which use cases this model is best suited for.

ISEKAI ZERO

AI adventures. Travel with your favorite characters

2.53Btokens

Janitor AI

Janitor AI is a chatbot platform where users create and chat with custom AI characters for interactive roleplay, storytelling, and immersive fiction.

2.05Btokens

Hermes Agent

Hermes Agent is an open-source, self-improving AI agent by Nous Research that runs persistently with memory across sessions, and builds reusable skills from experience. It comes with 40+ built-in tools, including web search, browser automation, and vision, plus scheduled automations and subagents.

1.97Btokens

SillyTavern

SillyTavern is the LLM frontend for power users, a chat interface that connects to any model and gives deep control through character creation, roleplay, and prompt customization.

1.23Btokens

OpenClaw

OpenClaw is an open-source AI agent that connects to your messaging apps and takes real actions on your behalf, from running commands and browsing the web to managing files and sending emails.

1.03Btokens

Rest of OpenRouter

2.68B

Top 5 Apps

245M

Not currently available through EU in-region routing. In-region routing docs

More models from SpaceXAI

Grok STT 2.0

Grok STT 2.0 is a speech-to-text model from SpaceXAI and the successor to Grok STT 1.0. It is suited for transcription workloads that need word-level timestamps, optional speaker diarization, and multichannel audio.

Transcription$0.000028/second

Grok Imagine Video 1.5 Lite

Grok Imagine Video 1.5 Lite is a faster, lower-cost video generation model from SpaceXAI, distilled from Grok Imagine Video 1.5. It supports text-to-video and image-to-video, trading some quality for speed and price. 1080p output is rendered at 720p and upscaled.

Videofrom $0.02/second

Grok 4.7

Grok 4.7 is SpaceXAI's flagship model for coding, agentic tasks, and knowledge work, succeeding Grok 4.6. It is particularly strong at long-running software engineering tasks, verifying its own work, and managing long context, and it improves on its predecessor at professional knowledge work such as drafting documents and presentations.

The model was trained with a longer reinforcement learning run weighted toward problems that take many hours to complete, and natively understands the Grok Bot harness for conversational tasks. It ships with a new safeguard stack that pairs strong jailbreak resistance with low refusal rates for legitimate cybersecurity and biology work. SpaceXAI's reported benchmark results use the xhigh reasoning effort.

Text500K context$2 / $6

Grok 4.7 (batch)

Text500K context$1.60 / $4.80

Grok 4.6

Grok 4.6 is a model from SpaceXAI with frontier performance on coding, knowledge work, and STEM. It is succeeded by Grok 4.7.

Text500K context$2 / $6

Grok 4.6 (batch)

Grok 4.6 is a model from SpaceXAI with frontier performance on coding, knowledge work, and STEM. It is succeeded by Grok 4.7.

Text500K context$1.60 / $4.80

Grok Imagine Image 2.0

Grok Imagine Image 2.0 is an image generation and editing model from xAI. It is suited for creating images from text prompts and editing images from references, with low and medium quality modes.

Imagefrom $0.04/image

Grok STT 1.0

Grok STT is SpaceXAI's speech-to-text model, available via the REST /v1/stt endpoint. It supports transcription with word-level timestamps, optional speaker diarization, and multichannel audio.

Transcription$0.000028/second

Grok Imagine Video 1.5

Grok Imagine Video 1.5 is a video generation model from SpaceXAI. It creates videos from text prompts, with an optional starting image to guide the scene. It can direct subject and camera motion, pacing, atmosphere, and physical behavior while maintaining visual continuity, and can generate synchronized sound effects, ambience, and dialogue.

Videofrom $0.08/second

Grok 4.5

Grok 4.5 is a model from SpaceXAI with frontier performance on coding, knowledge work, and STEM.

Text500K context$2 / $6

Grok Latest

This model always redirects to the latest Grok model from xAI.

Text500K context

Grok Build 0.1

Grok Build 0.1 is SpaceXAI’s fast coding model trained specifically for agentic software engineering workflows. It supports text and image inputs with text output, and is optimized for interactive coding agents, tool use, and multi-step development tasks. The model powers SpaceXAI’s Grok Build CLI and features a 256K context window with no text output limit, making it well suited for long-horizon coding and automation workflows. Currently in early access.

Text256K context$1 / $2

Grok Imagine Video

Grok Imagine Video is SpaceXAI's fast, text-, image-, and reference-conditioned video generation model. It produces short videos (1–15 seconds, 24 fps) at 480p or 720p across seven aspect ratios - 1:1, 16:9, 9:16, 4:3, 3:4, 3:2, and 2:3.

The model supports three generation modes: text-to-video from a prompt alone, image-to-video that animates a still input, and reference-to-video that grounds the output in up to seven reference images for consistent characters, styles, or settings.

Videofrom $0.05/second

Grok Imagine Image Quality

Grok Imagine Image Quality is SpaceXAI's fast, high-fidelity image generation and editing model. It accepts text prompts and optional reference images, producing photorealistic outputs at 1K or 2K across a range of aspect ratios, including flexible adjustment of reference images.

The model emphasizes realistic detail — natural lighting and physics, accurate textures, and consistent rendering of named entities such as brands, public figures, and specific locations. It supports clean multilingual text rendering inside images, making it the top choice for posters, packaging, ads, menus, and social graphics. When given reference images, it preserves identity and structure for product placement, brand-aligned variations, and character continuity across scenes.

Image

Grok Voice TTS 1.0

Grok Voice TTS 1.0 is a text-to-speech model from SpaceXAI. It converts text into spoken audio across 20+ languages with automatic language detection, and offers five built-in voices (Eve, Ara, Rex, Sal, Leo) covering a range of tones. Inline speech tags allow control over pauses, emphasis, pitch, speed, and vocal style. Output is available in MP3, WAV, PCM, μ-law, and A-law formats at sample rates from 8 kHz to 48 kHz, with up to 15,000 characters per request.

Speech$15/M characters

Grok 4.3

Grok 4.3 is a reasoning model from SpaceXAI. It accepts text and image inputs with text output, and is suited for agentic workflows, instruction-following tasks, and applications requiring high factual accuracy. Reasoning can be configured between none/low/medium/high (default low) effort levels.

It supports a 1 million token context window with no output token limit, making it well-suited for long-document analysis, deep research, and multi-step agentic tasks. Pricing is tiered: requests exceeding 200k total tokens are billed at a higher rate.

Text1M context$1.25 / $2.50

Grok 4.3 (batch)

Text1M context$1 / $2

Grok 4.20 Multi-Agent

Grok 4.20 Multi-Agent is a variant of SpaceXAI’s Grok 4.20 designed for collaborative, agent-based workflows. Multiple agents operate in parallel to conduct deep research, coordinate tool use, and synthesize information across complex tasks.

Reasoning effort behavior:

Text2M context$1.25 / $2.50

Grok 4.20

Reasoning can be enabled/disabled using the reasoning enabled parameter in the API. Learn more in our docs

Text2M context$1.25 / $2.50

Grok 4.20 Multi-Agent Beta

Grok 4.20 Multi-Agent Beta is a variant of xAI’s Grok 4.20 designed for collaborative, agent-based workflows. Multiple agents operate in parallel to conduct deep research, coordinate tool use, and synthesize information across complex tasks.

Reasoning effort behavior:

Text2M context

SpaceXAI: Grok 4.20

Providers