Grok 4

Jul 2025
Retired 2026-05-15Replace withGrok 4.7Newer versionGemini 4 ArgonCheaper, as goodGPT-6 LunaBetterMiMo v2.6 ProOpen weights
Grok 4
Compare in
on
—per task?
$3 / $15per 1M in / out?
83 tok/sfirst token in 9.5 s?
256Kcontext

Rankingin thinking mode?

Retired models are left out of the current rankings.

Alternatives?

ModelScoreCostPer taskWhat changes
CheaperClaude Sonnet 5.5max×2.5-33%$5.46No forced tool use+5BetterGPT-5.6 Lunamedium+11%-93%$0.016OpenMiMo v2.6 Prothinking×2.1-91%$0.13Pass back reasoning_content+3CheaperGemini 4 Argonhigh×2.3-33%*$1.99Synchronous output stops at 65,536+2CheaperGPT-6.1 Solmax×2.3-33%$0.72Remove unsupported parameters+5

History

8 versions
20304050Jul 25Oct 25Jan 26Apr 26Jul 26Oct 26Release dateAA Intelligence Index 4.3.244.20 · Mar4.20 · Apr4.34.54.64.7
20304050Jul 25Jan 26Jul 26Release dateAA Intelligence Index 4.3.244.20 · Mar4.20 · Apr4.54.64.7

Benchmarks

all categories
Chat & Knowledge
Humanity's Last Exam26.7
AA Omniscience Index2.1
CritPt (physics)2
AA Intelligence Index 4.3.2≈22.5
AA Omniscience · Accuracy40.5
AA Omniscience · Hallucination Rate64.5
AA-LCR (long context) 1.168
MMLU-Pro · official boardlab87
GPQA Diamond87.7
AIME 2025 · AA archived92.7
Coding
Terminal-Bench Hard (version unstated)37.9
LiveCodeBench · AA archived81.9
Agents & Tool Use
τ²-bench · AA74.9
Writing & Language
IFBench (instructions)53.7
Vision & Documents
MMMU-Pro (vision)68.8

FAQ

How much does Grok 4 cost?›

$3 per 1M input tokens and $15 per 1M output tokens (cheapest host: Azure AI Foundry).

Is Grok 4 free to use?›

There is no free API; the cheapest paid price is $3 per 1M input tokens.

How can I use Grok 4?›

Through the API of Azure AI Foundry.

What is the context window of Grok 4?›

256K tokens.

When was Grok 4 released? Is there a newer version?›

Released 2025-07-10. It has been superseded by Grok 4.3.

Is Grok 4 open source?›

No, Grok 4 is a closed model available through an API. The closest open-weights option here is MiMo v2.6 Pro.

Can Grok 4 read images?›

It accepts text and images as input.

What is Grok 4?›

Grok 4 is a closed language model from xAI, released Jul 2025.

What are the best alternatives to Grok 4?›

Claude Sonnet 5.5 (cheaper), GPT-5.6 Luna (better), MiMo v2.6 Pro (open weights).