Grok 4.3

Apr 2026
Grok 4.3
Compare in
on
$0.21per task?
$1.25 / $2.50per 1M in / outcache $0.20
188 tok/sfirst token in 18 s?
1Mcontext

Rankingat high effort?

Full ranking →
1Sonnet 5.563.62Opus 5.559.62GPT-6 Astra59.64Gemini 4 Argon57.14Muse Wonder Full57.1
···
63Ring 2.6 1T0.575Grok 4.3075Haiku 4.50

Strong at

S
Tool calling#9 of 242Knowledge#28 of 318Instructions#3 of 245
A
Reasoning#56 of 334Science#34 of 312
B
Long context#101 of 273Vision#34 of 124
C
Coding#75 of 132Agents & work tasks#89 of 175

Alternatives?

ModelScoreCostPer taskWhat changes
CheaperMiMo v2.6 ProthinkingOpen+34.8-35%$0.13Pass back reasoning_content+3BetterGPT-6 Lunamedium+2.5-91%$0.017Function calling only with none · Chat Completions+3OpenGLM 5.3max+41.9+877%$2.01No image input+4Lower effortSame modelnon-thinkingsame-17%$0.17CheaperGPT-6.1 Sollow+30.8-36%$0.13Remove unsupported parameters+5

History

8 versions
0102030Jul 26Release dateTerminal-Bench 4.04.34.54.64.7
0102030Jul 26Release dateTerminal-Bench 4.04.34.54.64.7

Benchmarks

in Coding
Terminal-Bench 2.139.7#85
Terminal-Bench 4.00#75
Terminal-Bench Hard (version unstated)37.9#36
SciCode48.3#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?›

#56 of 334 in Chat & Knowledge, #75 of 132 in Coding, #106 of 133 in Agents & Tool Use, #52 of 195 in Writing & Language, #34 of 124 in Vision & Documents. Strongest at: Tool calling, Reasoning, Science, Knowledge, Instructions.

Is Grok 4.3 better than Solar Pro 4?›

On Terminal-Bench 4.0, Grok 4.3 scores 0 vs 0 — about the same. It is 71% cheaper per task.

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 It has been superseded by Grok 4.6.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 GLM 5.3.

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-6 Luna (better), GLM 5.3 (open weights).