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 Argon1,536.82Muse Wonder1,521.83Fable 5.11,518.34Opus 5.51,516.95Gemini 3.8 Flash1,515.8
···
86Qwen3 235B A22B Thinking 25071,399.987Grok 4.31,39988Grok 4.71,398.7

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
CheaperGemini 3 Flash Previewunstatedwins 61%-28%$0.50 / $3BetterGPT-5.6 Lunaxhighwins 54%-71%$0.085OpenKimi K3maxwins 62%+284%$2.00Sampling parameters are fixed+3CheaperMiMo v2.6 ProunstatedOpenwins 61%-65%$0.43 / $0.87Pass back reasoning_content+3CheaperGLM 5.3 FlashunstatedOpenwins 60%-85%$0.15 / $0.50Defaults to max · Self-hosted+4

History

8 versions
1,4001,4201,440Jul 25Oct 25Jan 26Apr 26Jul 26Oct 26Release dateArena Text · Russian44.34.54.64.7
1,4001,4201,440Jul 25Jan 26Jul 26Release dateArena Text · Russian44.34.54.64.7

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 235B A22B Thinking 2507?›

On Arena Text · Russian, Grok 4.3 scores 1,399 vs 1,399.9 — 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 It has been superseded by Grok 4.6.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?›

Gemini 3 Flash Preview (cheaper), GPT-5.6 Luna (better), Kimi K3 (open weights).