Grok 4.3
Grok 4.3Alternatives?
CheaperGPT-6.1 Sollow+70.7-11%$0.13Remove unsupported parameters+5BetterGPT-6 Lunalow+23.9-97%$0.005Function calling only with none · Chat Completions+3
OpenMuse Spark Openxhigh+57.7+477%$0.84Reasoning off leaves output unchanged · Self-hosted / llama.cpp+1CheaperGPT-6.1 Terrahigh+61.5-8%$0.13CheaperGPT-6 Sollow+59.6-9%$0.13GPT-6.1 Sollow+70.7-11%$0.13Remove unsupported parameters+5GPT-6.1 Terrahigh+61.5-8%$0.13GPT-6 Sollow+59.6-9%$0.13MMotif 3Open+43.3-44%$0.50 / $2Context: 1M → 262K+1
Gemini 3 Flash Previewthinking+43.2-28%$0.50 / $3GPT-6 Lunalow+23.9-97%$0.005Function calling only with none · Chat Completions+3
Granite 4.2 3BthinkingOpen+18.4-96%$0.006Context: 1M → 128K+1Gemma 4 E4BthinkingOpen+13.4-94%$0.008Context: 1M → 128KGPT-5.6 Lunalow+18.4-93%$0.01
Mistral Small 4thinkingOpen+2.7-88%$0.017Context: 1M → 262KMuse Spark OpenxhighOpen+57.7+477%$0.84Reasoning off leaves output unchanged · Self-hosted / llama.cpp+1
Kimi K3maxOpen+52.8+1,268%$2.00Sampling parameters are fixed+3
Step 5 PreviewthinkingOpen+49.5+602%$1.03web_search not available · Chat Completions+2
GLM 5.3maxOpen+47.4+1,272%$2.01No image input+4MMotif 3Open+43.3-44%$0.50 / $2Context: 1M → 262K+1History
8 versionsBenchmarks
in Chat & KnowledgeFAQ
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 $0.15 at default 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?›
#234 of 360 in Chat & Knowledge, #78 of 137 in Coding, #115 of 138 in Agents & Tool Use, #80 of 197 in Writing & Language, #83 of 132 in Vision & Documents.
Is Grok 4.3 better than Grok 4.20?›
On AA Omniscience Index, Grok 4.3 scores 18 vs 14.8 — 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 It has been superseded by Grok 4.6.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 Muse Spark Open.
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?›
GPT-6.1 Sol (cheaper), GPT-6 Luna (better), Muse Spark Open (open weights).