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xAI Grok 4.3 VS xAI Grok 4.5

✍️ Analysis by:the whichllmmodel Editorial Team|📅 Updated: June 2026

📊Our Take

Standardized reasoning and coding benchmarks are currently pending verification for one or both of these models. We recommend testing Grok 4.3 and Grok 4.5 directly in their respective provider playgrounds to see which fits your specific prompt styles best.
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Model Specs

Grok 4.3

Benchmarks & Scores

Coding (swe-bench-pro)
N/A

excellent at multi-file repositories, autonomous agents, and industrial codebases

Reasoning (gpqa-diamond)
90.1%

graduate-level science QA

Cost & Performance

Cost (per 1M tokens)1.9x cheaper
$1.56Input: $1.25 | Output: $2.50
Context WindowLarger
1.05M tokens
Model Specs

Grok 4.5

Benchmarks & Scores

Coding (swe-bench-pro)
64.7%

excellent at multi-file repositories, autonomous agents, and industrial codebases

Reasoning (gpqa-diamond)Winner (+2.9%)
93%

graduate-level science QA

Cost & Performance

Cost (per 1M tokens)
$3.00Input: $2.00 | Output: $6.00
Context Window
500k tokens

Frequently Asked Questions about Grok 4.3 vs Grok 4.5 comparison

Grok 4.3 is cheaper than Grok 4.5. Grok 4.3 has a blended cost of $1.56/1M tokens, which is about 1.9x cheaper than Grok 4.5 at $3.00/1M tokens.