xAI

xAI

Grok 4.20 Multi-Agent

Grok 4.20 run as a multi-agent ensemble, at the same list price. 2M context, vision, file input, reasoning.

Modalities

Text+Image → Text

Below release

Not established

Weights

Not published

Where it sits in the catalogue Kyma measures

Every number against every text model Kyma prices per token — a stated rule, not a chosen line-up.

Price · input#47/69

$1.767

output $3.534

median $1.009 · best $0.0494

Price · output#36/69

$3.534

per 1M tokens generated

median $3.528 · best $0.2164

Availability · 30d#29/68

94.1%

356 observations since 2026-08-01

median 93.2% · best 100.0%

Throughput#1/67

324.4 tok/s

probe median, one fixed prompt

median 39.7 tok/s · best 324.4 tok/s

Response time#62/67

7.11 s

probe median, to a complete answer

median 2.54 s · best 0.86 s

Context

2M

max output 8,192

published by xAI, not measured here

Tick above each rail is this model, below it the other 68. Dashed rule is the field median, solid is its best. Better is left; the axis stops at the 90th percentile, so a few models sit past its right edge.

Usage

How much this model is actually called here.

Rank

#35

of 98 active models

Tokens served

6.2M

all-time

Platform share

0.2%

of all tokens

Two clocks, and why they disagree

Kyma measures this model twice. Both are real; they answer different questions.

Probe · every 6h · 30 days

7.11s to answer

One fixed prompt, on a schedule, to every model. Comparable, because the model is the only thing that changes.

Observations
356
Answered by a substitute
1

Real traffic · last 7 days

5.90s to answer

Your requests, at the lengths clients actually send. Not comparable between models, but it is what running this one feels like.

Requests
28
Completed
100%
p95
18.5 s

Production prompts here are shorter than the probe's. Use the probe figure to choose between models, the traffic figure to budget for your own.

Pricing

Pay per token. Cached input bills at this model’s own cached rate, listed below.

$1.767 /1M input$3.534 /1M output
Hobby10 req/day · 2K in / 500 out
~$1.59/mo
Production1,000 req/day · 2K in / 500 out
~$159/mo
Scale20,000 req/day · 2K in / 500 out
~$3,181/mo
+ Estimate your workload
1,000
2,000
500

Estimated monthly cost

$159

$5.30 / day on Grok 4.20 Multi-Agent

Same workload on:

Grok 4.6$284+78%
Grok 4.20$159

Estimates use list pricing. Actual bills depend on real token counts, and every response includes its exact cost.

How it compares

Against the peers people actually weigh it against.

SpecGrok 4.20 Multi-AgentGrok 4.6Grok 4.20
Input /1M$1.767$2.70$1.763
Output /1M$3.534$8.10$3.528
Context2M500K2M
ToolsNoYesYes
ReasoningYesYesYes
Throughput324.4 tok/s56.6 tok/s38.9 tok/s

Quick start

Up and running in under two minutes.

  1. 1

    Create an API key

    Sign up and grab a key from the dashboard. Grok 4.20 Multi-Agent needs a top-up — the signup credit covers the free tier.

    Get API key →
  2. 2

    Make your first request

    Drop in your key and send a chat completion — fully OpenAI-compatible.

    curl https://kymaapi.com/v1/chat/completions \
      -H "Authorization: Bearer YOUR_API_KEY" \
      -H "Content-Type: application/json" \
      -d '{
        "model": "grok-4.20-multi-agent",
        "messages": [
          {"role": "user", "content": "Explain prompt caching in one paragraph."}
        ]
      }'
  3. 3

    Stream responses

    Add "stream": true to receive tokens as they arrive.

    curl https://kymaapi.com/v1/chat/completions \
      -H "Authorization: Bearer YOUR_API_KEY" \
      -H "Content-Type: application/json" \
      -d '{
        "model": "grok-4.20-multi-agent",
        "stream": true,
        "messages": [{"role": "user", "content": "Hello!"}]
      }'

FAQ

Common questions about this model.

What is the context window of Grok 4.20 Multi-Agent?

Grok 4.20 Multi-Agent has a 2M-token context window — roughly 2941 pages of text in a single request.

How much does the Grok 4.20 Multi-Agent API cost?

$1.767 per 1M input tokens and $3.534 per 1M output tokens. No subscription; you pay only for what you use.

Does Grok 4.20 Multi-Agent support function calling?

No — Grok 4.20 Multi-Agent does not support tool calling. For agent workloads, choose a tools-enabled model from the catalog.

Are the weights for Grok 4.20 Multi-Agent publicly available?

No. xAI does not publish Grok 4.20 Multi-Agent's weights — it is reachable through an API rather than as a file you can download and run (https://docs.x.ai/developers/release-notes, read 2026-08-14). That is xAI's decision about their own product, not a limitation of Kyma.

Is Grok 4.20 Multi-Agent ever served below the precision its creator released it at?

Kyma cannot say, and for this model nobody can. xAI does not publish Grok 4.20 Multi-Agent's weights, so there is no released checkpoint whose precision a route could be measured against. We publish "not established" rather than reading a low format as a downgrade: on several models in this catalogue a low format is exactly how the creator ships it.

How do I use Grok 4.20 Multi-Agent?

Kyma is OpenAI-compatible: point your SDK's base URL at https://kymaapi.com/v1, use your Kyma API key, and set the model to grok-4.20-multi-agent. Signing up is free, but this model needs a top-up: the $0.50 signup credit covers the free tier only.

Needs a top-up — the signup credit covers the free tier.Create account →

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