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AI model comparison

Grok 4.3 vs DeepSeek V4 Flash 0423

Pricing, context window, benchmarks, and features compared side by side. Or skip the guesswork and send one prompt to both.

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xAI

Grok 4.3

Grok 4.3 is a reasoning model from SpaceXAI.

Input / 1M
$1.25
Output / 1M
$2.50
Context
1M
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DeepSeek

DeepSeek V4 Flash 0423

DeepSeek V4 Flash is an efficiency-optimized Mixture-of-Experts model from DeepSeek with 284B total parameters and 13B activated parameters, supporting a 1M-token context window.

Input / 1M
$0.01
Output / 1M
$1.28
Context
1.05M

At a glance

Quick verdict

How the two models stack up on the things people ask about most.

Lower price

deepseek logo

DeepSeek V4 Flash 0423

5.7x cheaper for a typical chat

Higher intelligence score

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Grok 4.3

24.9 vs 24.4 on Artificial Analysis

Larger context window

deepseek logo

DeepSeek V4 Flash 0423

1.05M vs 1M tokens

Newer release

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Grok 4.3

Released April 30, 2026

Benchmarks

Benchmark scores

Independent scores from Artificial Analysis. Higher is better.

Intelligence index

x-ai logoGrok 4.324.9
deepseek logoDeepSeek V4 Flash 042324.4

Coding index

x-ai logoGrok 4.342.2
deepseek logoDeepSeek V4 Flash 042352

Agentic index

x-ai logoGrok 4.315.5
deepseek logoDeepSeek V4 Flash 042326.3

Pricing

Grok 4.3 vs DeepSeek V4 Flash 0423 API pricing

Per-token API rates. Cheaper option highlighted.

Metricx-ai logoGrok 4.3deepseek logoDeepSeek V4 Flash 0423
Input tokensPer 1M tokens$1.25$0.01
Output tokensPer 1M tokens$2.50$1.28
Cached input (read)Per 1M tokens$0.20$0.01
Cache writePer 1M tokensNot availableNot available
Long-context pricingPer 1M tokens, for very long prompts$2.50 in / $5 out above 200KSame rate at any length
Web searchPer request$0.005Not available

What it costs in practice

Estimated cost per 1,000 requests at standard rates. Coding and long-document figures also show the cost when the input is already cached.

Chat message

2K in, 500 out

x-ai logoGrok 4.3$3.75
deepseek logoDeepSeek V4 Flash 0423$0.66

Coding task

30K in, 4K out

x-ai logoGrok 4.3$47.50$16 cached
deepseek logoDeepSeek V4 Flash 0423$5.42$5.42 cached

Long document summary

150K in, 2K out

x-ai logoGrok 4.3$192.50$35 cached
deepseek logoDeepSeek V4 Flash 0423$4.05$4.05 cached

Specs

Context window and capabilities

How much each model can read, how much it can write, and what it accepts as input.

Metricx-ai logoGrok 4.3deepseek logoDeepSeek V4 Flash 0423
Context window1M tokens1.05M tokens
Max output900K tokens944K tokens
Input typesFile, Image, TextText
Output typesTextText
Reasoning effort levelsHigh, Medium, Low, NoneExtra high, High
Default reasoning effortLowHigh
Release dateApril 30, 2026April 24, 2026

Features

Supported features

API features available for each model.

Metricx-ai logoGrok 4.3deepseek logoDeepSeek V4 Flash 0423
Tool callingSupportedSupported
Structured outputsSupportedSupported
JSON modeSupportedSupported
ReasoningSupportedSupported
TemperatureSupportedSupported
Stop sequencesNot supportedSupported
Deterministic seedSupportedSupported
Verbosity controlNot supportedNot supported

Our take

DeepSeek V4 Flash 0423 is 5.7x cheaper for a typical chat. Grok 4.3 scores higher on the Artificial Analysis Intelligence Index (24.9 vs 24.4). DeepSeek V4 Flash 0423 has the larger context window (1.05M vs 1M tokens). The right pick depends on your workload, so the quickest way to settle it is to send the same prompt to both and compare.

FAQ

Frequently asked questions

Is Grok 4.3 or DeepSeek V4 Flash 0423 cheaper?

DeepSeek V4 Flash 0423 is cheaper for a typical chat (2K input tokens and 500 output tokens). DeepSeek V4 Flash 0423 costs $0.01 per 1M input tokens and $1.28 per 1M output tokens, while Grok 4.3 costs $1.25 per 1M input tokens and $2.50 per 1M output tokens.

Which has a bigger context window, Grok 4.3 or DeepSeek V4 Flash 0423?

DeepSeek V4 Flash 0423 supports up to 1.05M tokens of context, compared with 1M for Grok 4.3.

Is Grok 4.3 smarter than DeepSeek V4 Flash 0423?

On the Artificial Analysis Intelligence Index, Grok 4.3 scores 24.9 and DeepSeek V4 Flash 0423 scores 24.4, putting Grok 4.3 ahead. Benchmarks don't capture everything, so the best test is running your own prompts through both.

Can I use Grok 4.3 and DeepSeek V4 Flash 0423 at the same time?

Yes. Shortcut Chat sends one prompt to multiple models at once, so you can see Grok 4.3 and DeepSeek V4 Flash 0423 answer side by side and keep the better response.

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Why choose? Ask both.

Send one prompt to Grok 4.3 and DeepSeek V4 Flash 0423 at the same time. Compare the answers side by side and keep the best one.

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