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NOUMEN

xAI · Frontier

Grok Latest

Added May 3, 2026

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Use in the app

Compatibility alias that routes to the newest Grok model. Currently routes to Grok 4.7. Content policy rejections can still be charged: SpaceXAI may pass through a $0.05 moderation-failure fee, or a $0.055 usage-guidelines violation fee, depending on which rejection upstream returns.

  • Reasoning
  • Tools
  • Vision
  • Structured output
Input
Text, Images
Output
Text
Reasoning effort
low · medium · high · xhigh
Discovery tier
Frontier

Pricing

USD per 1M tokens
Input
$2.00
Output
$6.00
Cache read
$0.50

Reference prices as published by the model provider. API example

Specifications

Context window
500K
Max output
—

Side by side

Grok Latest compared

Specifications, prices, speed and benchmark scores next to each other. Benchmarks below show every compared model too.

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Grok LatestxAIThis modelClaude Sonnet 5.5AnthropicRemove
ProviderxAIAnthropic
Discovery tierFrontierFrontier
AddedMay 3, 2026Sep 28, 2026
Limits
Context window500K1MBest
Max output—128K
Average output—523 tokens
Pricing, USD per 1M tokens
Input$2.00$2.00
Output$6.00Best$10.00
Cache read$0.50$0.10Best
Cache write—$2.50
Performance
Throughput69.5 tok/s152.3 tok/sBest
Time to first token2.7 sBest4.8 s
Request success (24h)99.9%Best99.8%
Benchmark indexes
Intelligence Index46.346.8Best
Capabilities
ReasoningYesYes
ToolsYesYes
VisionYesYes
Structured outputYesYes
PDF inputNoYes
Reasoning effortlow, medium, high, xhighlow, medium, high

Public evaluations

Benchmarks

Independent evaluation results, with how each score ranks among the models in the Noumen catalog.

  • Grok Latest
  • Claude Sonnet 5.5

Intelligence Index

  • Grok Latest46.3
  • Claude Sonnet 5.546.8

Grok Latest tested at high reasoning effort

Grok Latest: Better than 92% of 326 scored models

3.8Catalog models by score55.1

Agentic work

  • AutomationBench-AA

    Workflow automation, penalized for guardrail violations

    • Grok Latest: 63.5%Top
    • Claude Sonnet 5.5: 59.4%

  • AutomationBench-AA tasks completed

    Workflows finished end to end without a guardrail violation

    • Grok Latest: 37.7%Top
    • Claude Sonnet 5.5: 29.4%

  • AA-Briefcasev1.1

    Agentic knowledge work, rated head to head

    • Grok Latest: 1,630 Elo
    • Claude Sonnet 5.5: 1,635 EloTop

  • GDPval-AAv2.1

    Economically valuable occupational tasks, rated head to head

    • Grok Latest: 1,707 EloTop
    • Claude Sonnet 5.5: 1,548 Elo

Document reasoning

  • GDP.pdf

    Professional reasoning over PDF documents, all-pass rate

    • Grok Latest: 23.2%
    • Claude Sonnet 5.5: 25.2%Top

  • AA-LCRv1.1

    Reasoning across long documents

    • Grok Latest: 77.0%
    • Claude Sonnet 5.5: 78.0%Top

  • MLCR-AA

    Long-context reasoning over medical records

    • Grok Latest: 18.9%Top
    • Claude Sonnet 5.5: 18.9%Top

Reasoning and knowledge

  • Humanity’s Last Exam

    Expert-level questions across academic fields

    • Grok Latest: 42.3%
    • Claude Sonnet 5.5: 45.8%Top

Coding

  • Terminal-Benchv4.0

    Practical software engineering in a terminal

    • Grok Latest: 24.7%
    • Claude Sonnet 5.5: 43.9%Top

  • SciCode

    Scientific computing in Python

    • Grok Latest: 57.8%Top
    • Claude Sonnet 5.5: 53.7%

Legacy evaluations

  • AA-LCR (unversioned)

    Long-context reasoning, earlier grading

    • Grok Latest: 77.0%
    • Claude Sonnet 5.5: 78.0%Top

Scores from Artificial Analysis, updated Oct 26, 2026. Grok Latest was tested at high reasoning effort; compare scores measured at the same effort.Artificial Analysis

Live routing data

Performance and reliability

Recent averages across requests routed for this model. Your own speed depends on prompt length, reasoning effort and load.

Throughput
69.5 tok/s
Faster than 50% of 260 models
Time to first token
2.7 s
Quicker than 60% of 260 models
Prompt cache hits
16.4%
About $1.75 per 1M input tokens with caching
Request success (24h)
99.9%
Reliable

Cache hits are the share of input tokens recently served from a prompt cache across all requests. They are not a forecast of your own hit rate.

Hourly request success · last 72 hoursLowest hour 92.8%
  • Healthy (98% or more)
  • Degraded (90–98%)
  • Down (under 90%)
  • No requests

Developers

Use it through the API

Noumen’s API is OpenAI-compatible: any Chat Completions client works with a base URL and a key.

Read the quickstart
curl https://www.noumen.xyz/api/v1/chat/completions \
  -H "Authorization: Bearer $NOUMEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "x-ai/grok-latest",
    "reasoning_effort": "medium",
    "messages": [{ "role": "user", "content": "Explain this stack trace." }]
  }'
import os
from openai import OpenAI

client = OpenAI(base_url="https://www.noumen.xyz/api/v1", api_key=os.environ["NOUMEN_API_KEY"])
reply = client.chat.completions.create(
    model="x-ai/grok-latest",
    messages=[{"role": "user", "content": "Explain this stack trace."}],
)
print(reply.choices[0].message.content)

xAI

Other xAI models, starting with the same family.