Grok 4.3

Apr 2026
Grok 4.3
Compare in
on
$0.21per task?
$1.25 / $2.50per 1M in / outcache $0.20
96 tok/sfirst token in 27 s?
1Mcontext

Rankingat high effort?

Full ranking →
1MiniMax M382.92Nemotron 3 Ultra81.43Grok 4.381.34Qwen3.7 Max80.55Nemotron Cascade 2 30B A3B80.4

Strong at

S
Tool calling#9 of 242Knowledge#29 of 320Instructions#3 of 245
A
Reasoning#58 of 336Science#34 of 312
B
Agents & work tasks#79 of 177Long context#103 of 314Vision#35 of 125
C
Coding#77 of 134

History

8 versions
50607080Jul 25Oct 25Jan 26Apr 26Release dateIFBench44.20 · Mar4.20 · Apr4.3
50607080Jul 25Oct 25Jan 26Apr 26Release dateIFBench44.20 · Mar4.3

Benchmarks

in Chat & Knowledge
AA Intelligence Index 4.3.224.9#87
AA Omniscience Index18#29
AA Omniscience · Accuracy34.8#62
AA Omniscience · Hallucination Rate25.8#22
Humanity's Last Exam37.2#58
GPQA Diamond90.1#34
AA-LCR (long context) 1.173#103
IFBench (instructions)81.3#3
CritPt (physics)8#71
GDP.pdf · AA all-pass5.8#82
MLCR-AA8.3#66
GPQA Diamond · Epoch88.8#39
OTIS Mock AIME 2024 202593.3#39
FrontierMath Tiers 1–3 (v2)42.8#51
FrontierMath Tier 4 (v2)14.6#47
SimpleQA Verified v133.2#54
Chess Puzzles18#57

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. A typical benchmark task costs about $0.21 at high effort.

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?›

#58 of 336 in Chat & Knowledge, #77 of 134 in Coding, #108 of 135 in Agents & Tool Use, #80 of 197 in Writing & Language, #35 of 125 in Vision & Documents. Strongest at: Tool calling, Reasoning, Science, Knowledge, Instructions.

Is Grok 4.3 better than Grok 4.20?›

On IFBench (instructions), Grok 4.3 scores 83.3 vs 81.2 — higher.

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 It has been superseded by Grok 4.6.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 MiniMax M3.

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 v2.5 Pro (cheaper), MiniMax M3 (open weights).