xAIMultimodalReleased 31 March 2026
Grok 4.20 Multi-Agent pricing, context and benchmark
Grok 4.20 Multi-Agent is a variant of SpaceXAI’s Grok 4.20 designed for collaborative, agent-based workflows.
2M
Input context
1.80M
Output context
$1.25
Official input
$2.5
Official output
n/a
AA index
01 · Model Overview
Everything that matters, in one table
Context, pricing, cache, modalities and tooling, from the model registry and Artificial Analysis.
| Model | Grok 4.20 Multi-Agent |
| Model ID | x-ai/grok-4.20-multi-agent |
| Provider | xAI |
| Release date | 31 March 2026 |
| Status | Generally available |
| Input context | 2,000,000 tokens |
| Output context | 1,800,000 tokens |
| Official input pricing | $1.25 per 1M tokens |
| Official output pricing | $2.5 per 1M tokens |
| Cache read pricing | Not published |
| Market input pricing | $1.25 per 1M (cheapest route) |
| Market output pricing | $2.5 per 1M (cheapest route) |
| Highest route pricing | $2.5 in, $5 out per 1M |
| Input modalities | text · image · file |
| Output modalities | text |
| Reasoning control | Not exposed |
| Tool support | Text generation only |
| Tokenizer | Grok |
| Provider routes | 4 endpoints |
| Artificial Analysis index | Not published |
| Speed | Not published |
| Knowledge cutoff | Not publicly stated |
Input and output support
| Modality | Input | Output | Billed at |
|---|---|---|---|
| Text | ✓ yes | ✓ yes | $1.25 in |
| Image | ✓ yes | no | $1.25 in |
| Audio | no | no | not supported |
| Video | no | no | not supported |
| File (PDF) | ✓ yes | no | $1.25 in |
02 · Overview
What is 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...
Grok 4.20 Multi-Agent carries a 2M token window, uses the Grok tokenizer and is served by xAI. On Hoodgen it sits in the Multimodal tier of the model menu next to its siblings, so you can switch mid conversation without losing the thread.
03 · Release
Release and what changed from the previous version
Released31 March 2026
This is the only release of Grok 4.20 Multi-Agent on OpenRouter, released 31 March 2026. The provider has not published a knowledge cutoff, so treat training data as recent but unconfirmed for very new events.
04 · Capabilities
Features and capabilities
◉
Vision
Screenshots, charts and photographed documents are read at the text token rate.
▤
Files and PDFs
Documents go in as files rather than pasted text, keeping layout and tables intact.
07 · Use cases
What can you do with Grok 4.20 Multi-Agent?
Document understanding
Screenshots, charts, scanned pages and PDFs read in the prompt.
Mixed media briefs
One thread holding text, images and files together.
Extraction
Schema constrained JSON out of messy inputs.
Research synthesis
Several sources condensed with the figures preserved.
09 · Pricing
Grok 4.20 Multi-Agent pricing
Official pricing
List price
$1.25 / 1M in
$2.5 / 1M out
- 2M context
- text, image, file input
Cheapest route
$1.25 / 1M in
$2.5 / 1M out
- 4 routes on OpenRouter
- What Hoodgen routes to first
- Same model, lower bill
Highest route
$2.5 / 1M in
$5 / 1M out
- Priority or premium tier
- Best under load
- Use for latency critical calls
Market pricing, every route
| Provider | Tier | Input | Output | Cache read | Uptime 24h |
|---|---|---|---|---|---|
| xAI | standard | $1.25 | $2.5 | $0.2 | 100.0% |
| xAI | standard | $1.25 | $2.5 | $0.2 | 29.4% |
| xAI | priority | $2.5 | $5 | $0.4 | n/a |
| xAI | priority | $2.5 | $5 | $0.4 | n/a |
API pricing and cost calculator
| Rate | Per call | Total | Credits |
|---|---|---|---|
| Cheapest route | $0.0161 | $8.07 | 7672 |
| List price | $0.0288 | $14.38 | 13657 |
| Highest route | $0.0575 | $28.75 | 27313 |
10 · Developers
API and developer information
| Model ID | x-ai/grok-4.20-multi-agent |
| Endpoint | https://openrouter.ai/api/v1/chat/completions |
| Parameters | prompt and max_tokens |
| Streaming | Yes, server sent events |
| Modality string | text+image+file->text |
| Max prompt tokens | 2,000,000 |
| Max completion tokens | 1,800,000 |
curl https://openrouter.ai/api/v1/chat/completions \
-H "Authorization: Bearer $OPENROUTER_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "x-ai/grok-4.20-multi-agent",
"messages": [{ "role": "user", "content": "Summarise this document." }],
"max_tokens": 1024
}'11 · Limitations
Model limitations
| Text only output | It cannot generate images, audio or video. Pair it with an image model on Hoodgen when you need visuals. |
| Output cap | 1,800,000 tokens per request. Long deliverables have to be chunked. |
| Benchmarks not published | Artificial Analysis does not publish an Intelligence Index for this release, so no benchmark score is claimed here. |
| Knowledge cutoff | The provider does not state a fixed cutoff for every release. Verify very recent events against search. |
12 · Comparison
Grok 4.20 Multi-Agent vs other xAI models
| Model | Context | Input /1M | Output /1M | AA index | Released |
|---|---|---|---|---|---|
| Grok 4.20 Multi-Agent | 2M | $1.25 | $2.5 | n/a | 2026 |
13 · Privacy
Privacy and data policy
- On Hoodgen, prompts and attachments answer that request and stay in your conversation history so you can reopen it. They are not used to train models.
- Requests route through OpenRouter to xAI and are covered by that provider's API terms.
- Do not paste secrets or personal data you would not send to any hosted model.
14 · FAQ
Grok 4.20 Multi-Agent questions, answered
Grok 4.20 Multi-Agent is a multimodal model from xAI, released 31 March 2026. Grok 4.20 Multi-Agent is a variant of SpaceXAI’s Grok 4.20 designed for collaborative, agent-based workflows.
✦
Start chatting with Grok 4.20 Multi-Agent
Free to try on Hoodgen AI, with a live credit estimate before every send. No API key, no setup.