xAI

xAI

Grok 4.6

xAI's newest flagship. 500K context, vision, file input, reasoning; the rate doubles above 200K prompt tokens.

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#55/70

$2.70

output $8.10

median $0.977 · best $0.0494

Price · output#54/70

$8.10

per 1M tokens generated

median $3.4515 · best $0.2164

Availability · 30d#42/70

93.39%

439 observations since 2026-08-13

median 93.8% · best 100.0%

Throughput#20/70

57.1 tok/s

probe median, one fixed prompt

median 39.5 tok/s · best 311.7 tok/s

Response time#61/70

4.91 s

probe median, to a complete answer

median 2.46 s · best 0.84 s

Context

500K

max output 8,192

published by xAI, not measured here

Tick above each rail is this model, below it the other 69. 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

#68

of 117 active models

Tokens served

91.9K

all-time

Platform share

0.0%

of all tokens

Tokens · last 14 daysAug 26Sep 8

How it behaves under real clients

The same model answering different prompt shapes — measured, not benchmarked.

ClientRequestsTokensThroughputTo first tokenp95 totalCompleted
OpenClaw22002.27 s0%

Grouped by the client that sent the request. Not a benchmark: the same model on different prompt shapes. Throughput and time-to-first-token are medians; p95 is the slowest response in twenty. 2 clients under 100 requests not shown.

Two clocks, and why they disagree

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

Probe · every 6h · 30 days

4.91s to answer

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

Observations
439
Answered by a substitute
3

Real traffic · last 7 days

1.87s to answer

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

Requests
249
Completed
2.4%
p95
2.3 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.

$2.70 /1M input$8.10 /1M output
Hobby10 req/day · 2K in / 500 out
~$2.83/mo
Production1,000 req/day · 2K in / 500 out
~$284/mo
Scale20,000 req/day · 2K in / 500 out
~$5,670/mo
+ Estimate your workload
1,000
2,000
500

Estimated monthly cost

$284

$9.45 / day on Grok 4.6

Same workload on:

Grok 4.20 Multi-Agent$159-44%
Grok 4.20$159-44%

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 4.6Grok 4.20 Multi-AgentGrok 4.20
Input /1M$2.70$1.767$1.763
Output /1M$8.10$3.534$3.528
Context500K2M2M
ToolsYesNoYes
ReasoningYesYesYes
Throughput57.1 tok/s311.7 tok/s39 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 4.6 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-4.6",
        "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-4.6",
        "stream": true,
        "messages": [{"role": "user", "content": "Hello!"}]
      }'

FAQ

Common questions about this model.

What is the context window of Grok 4.6?

Grok 4.6 has a 500K-token context window — roughly 735 pages of text in a single request.

How much does the Grok 4.6 API cost?

$2.70 per 1M input tokens and $8.10 per 1M output tokens. No subscription; you pay only for what you use.

Does Grok 4.6 support function calling?

Yes — Grok 4.6 supports tool/function calling and structured outputs (JSON mode), so it works with agent frameworks out of the box.

Are the weights for Grok 4.6 publicly available?

No. xAI does not publish Grok 4.6'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 4.6 ever served below the precision its creator released it at?

Kyma cannot say, and for this model nobody can. xAI does not publish Grok 4.6'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 4.6?

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-4.6. 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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ModelContextInputOutput
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xAIGrok 4.31M$1.92$3.838
xAIGrok 4.202M$1.763$3.528
xAIGrok 4.20 Multi-Agent2M$1.767$3.534