Grok 4.3

Apr 2026
Grok 4.3
Compare in
on
—per task?
$1.25 / $2.50per 1M in / outcache $0.20
104 tok/sfirst token in 17 s?
1Mcontext

Rankingat medium effort?

Full ranking →
1Gemini 4 Argon1,5242Muse Wonder1,5093Opus 5.51,5084Fable 51,5045Opus 4.61,503
···
59Qwen3.6 Plus1,44361Grok 4.31,44261Qwen3.5 397B A17B1,442

Strong at

S
Knowledge#29 of 320Instructions#1 of 245
A
Tool calling#38 of 242Reasoning#82 of 336Science#46 of 312
B
Agents & work tasks#79 of 177Long context#90 of 314Vision#42 of 125
C
Coding#77 of 134

Alternatives?

ModelScoreCostPer taskWhat changes
CheaperMiMo v2.6 ProunstatedOpenwins 55%-65%$0.43 / $0.87Pass back reasoning_content+3BetterGPT-5.6 Terraxhighwins 53%+188%$0.63Prompts with >272K input tokensOpenKimi K3maxwins 56%+284%$2.00Sampling parameters are fixed+3CheaperGLM 5.3 FlashunstatedOpenwins 55%-85%$0.15 / $0.50Defaults to max · Self-hosted+4CheaperGemini 3 Flash Previewunstatedwins 54%-28%$0.50 / $3

History

8 versions
1,4201,4401,460Jul 25Oct 25Jan 26Apr 26Jul 26Oct 26Release dateArena Text44.34.54.64.7
1,4201,4401,460Jul 25Jan 26Jul 26Release dateArena Text44.34.54.64.7

Benchmarks

in Chat & Knowledge
AA Intelligence Index 4.3.2≈24.8#87
AA Omniscience Index16.7#29
AA Omniscience · Accuracy28.8#87
AA Omniscience · Hallucination Rate16.9#7
Humanity's Last Exam30#82
GPQA Diamond89#46
AA-LCR (long context) 1.175#90
IFBench (instructions)83.3#1
CritPt (physics)4.9#80

FAQ

How much does Grok 4.3 cost?›

$1.25 per 1M input tokens and $2.50 per 1M output tokens; cached input $0.20 per 1M.

Is Grok 4.3 free to use?›

There is no free API; the cheapest paid price is $1.25 per 1M input tokens.

How good is Grok 4.3, and what is it best at?›

#82 of 336 in Chat & Knowledge, #77 of 134 in Coding, #108 of 135 in Agents & Tool Use, #80 of 197 in Writing & Language, #42 of 125 in Vision & Documents. Strongest at: Tool calling, Reasoning, Science, Knowledge, Instructions.

Is Grok 4.3 better than Qwen3.5 397B A17B?›

On Arena Text · overall, Grok 4.3 scores 1,442 vs 1,442 — about the same.

How can I use Grok 4.3?›

Through the API of AWS Bedrock, xAI.

What is the context window of Grok 4.3?›

1M tokens, with up to 900K output tokens.

When was Grok 4.3 released? Is there a newer version?›

Released 2026-04-17. It has been superseded by Grok 4.6.

Is Grok 4.3 open source?›

No, Grok 4.3 is a closed model available through an API. The closest open-weights option here is Kimi K3.

Can Grok 4.3 read images?›

It accepts text and images, PDF files as input.

What is Grok 4.3?›

Grok 4.3 is a closed language model from xAI, released Apr 2026, the successor to Grok 4.20.

What are the best alternatives to Grok 4.3?›

MiMo v2.6 Pro (cheaper), GPT-5.6 Terra (better), Kimi K3 (open weights).