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AI model comparison

Claude Sonnet 4 (latest) vs Grok 4.3

Compare pricing, context limits, supported inputs and deployment options to choose a model for your workflow.

Claude Sonnet 4 (latest) from Anthropic lists 200K context, 64K maximum output. Grok 4.3 from xAI lists 1M context, 30K maximum output, $1.25 input per 1M tokens, $2.50 output per 1M tokens. Compare the inputs, outputs and deployment options below to see which fits your workflow.

Side-by-sideCapabilities and practical differences

Anthropic

Claude Sonnet 4 (latest)

Claude Sonnet 4 (latest) from Anthropic: Balanced Claude model for coding, analysis, agent workflows, and cost control.

Context
200K
Max output
64K

Accepts

  • Text input
  • Image input
  • PDF input

Produces

  • Text output
Full model profilegithub.com ↗
VS

xAI

Grok 4.3

Grok 4.3 from xAI: xAI's default Grok for chat, coding, agentic tools, and lower hallucination risk.

Context
1M
Max output
30K
Input / 1M tokens
$1.25
Output / 1M tokens
$2.50

Accepts

  • Text input
  • Image input
  • PDF input

Produces

  • Text output
Full model profilegithub.com ↗

At a glance

Key differences

Compare the available figures below, then try both models on the work you need to do.

Claude Sonnet 4 (latest)

  • Maximum output: 64K

Grok 4.3

  • Context capacity: 1M

Context capacity

Higher listed limit

Claude Sonnet 4 (latest):200K

Grok 4.3:1M

Grok 4.3

Maximum output

Higher listed limit

Claude Sonnet 4 (latest):64K

Grok 4.3:30K

Claude Sonnet 4 (latest)

Specifications

Pricing, limits and capabilities

Specifications for Claude Sonnet 4 (latest) and Grok 4.3. Higher limits and lower prices describe these figures only.
SpecificationClaude Sonnet 4 (latest)Grok 4.3
ProviderAnthropicxAI
Listed pricing routeAnthropicxAI
Model familyclaude-sonnetgrok
Accepted inputstext, image, pdftext, image, pdf
Produced outputstexttext
Context window200K1MHigher
Max output64KHigher30K
Input price / 1M—$1.25
Output price / 1M—$2.50
Reasoning modeDocumentedDocumented
Tool callingDocumentedDocumented
Image inputDocumentedDocumented
Audio inputNot documentedNot documented
Structured outputNot documentedDocumented
LicenseProprietaryProprietary

Workload guidance

Which model should you choose?

Consider Claude Sonnet 4 (latest) if you need larger maximum output. Consider Grok 4.3 if you need larger context. Test both on the same representative examples and judge the output against your acceptance criteria. Include tool failures, retries and the time to a completed task.

Documentation and model profiles

Explore each model’s features, API requirements and licence terms in the sources below.

Questions people ask

It brings together documented inputs and outputs, token limits, deployment terms and available pricing. When both models have source-linked, verified results on a shared benchmark, those results are shown with their individual sources. The comparison is a starting point for evaluating your own workload.

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