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AI model comparison

Gemini 3 Flash Preview vs Grok 4.20 (Non-Reasoning)

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

Gemini 3 Flash Preview from Google lists 1.05M context, 65.54K maximum output, $0.50 input per 1M tokens, $3.00 output per 1M tokens. Grok 4.20 (Non-Reasoning) 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

Google

Gemini 3 Flash Preview

Gemini 3 Flash Preview from Google: New Gemini flash lane bringing frontier-style multimodal reasoning to cheaper runs.

Context
1.05M
Max output
65.54K
Input / 1M tokens
$0.50
Output / 1M tokens
$3.00

Accepts

  • Text input
  • Image input
  • Video input
  • Audio input
  • PDF input

Produces

  • Text output
Full model profilegithub.com ↗
VS

xAI

Grok 4.20 (Non-Reasoning)

Grok 4.20 (Non-Reasoning) from xAI: Grok model for agentic tool use, reasoning, coding, and live assistance.

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.

Gemini 3 Flash Preview

  • Context capacity: 1.05M
  • Maximum output: 65.54K
  • Input price: $0.50

Grok 4.20 (Non-Reasoning)

  • Output price: $2.50

Context capacity

Higher listed limit

Gemini 3 Flash Preview:1.05M

Grok 4.20 (Non-Reasoning):1M

Gemini 3 Flash Preview

Maximum output

Higher listed limit

Gemini 3 Flash Preview:65.54K

Grok 4.20 (Non-Reasoning):30K

Gemini 3 Flash Preview

Input price

Lower listed token rate

Gemini 3 Flash Preview:$0.50

Grok 4.20 (Non-Reasoning):$1.25

Gemini 3 Flash Preview

Output price

Lower listed token rate

Gemini 3 Flash Preview:$3.00

Grok 4.20 (Non-Reasoning):$2.50

Grok 4.20 (Non-Reasoning)

Specifications

Pricing, limits and capabilities

Specifications for Gemini 3 Flash Preview and Grok 4.20 (Non-Reasoning). Higher limits and lower prices describe these figures only.
SpecificationGemini 3 Flash PreviewGrok 4.20 (Non-Reasoning)
ProviderGooglexAI
Listed pricing routeGooglexAI
Model familygemini-flashgrok
Accepted inputstext, image, video, audio, pdftext, image, pdf
Produced outputstexttext
Context window1.05MHigher1M
Max output65.54KHigher30K
Input price / 1M$0.50Lower$1.25
Output price / 1M$3.00$2.50Lower
Reasoning modeDocumentedNot documented
Tool callingDocumentedDocumented
Image inputDocumentedDocumented
Audio inputDocumentedNot documented
Structured outputDocumentedDocumented
LicenseProprietaryProprietary

Workload guidance

Which model should you choose?

Consider Gemini 3 Flash Preview if you need larger context or larger maximum output or a lower listed input rate. Consider Grok 4.20 (Non-Reasoning) if you need a lower listed output rate. 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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