Grok 4.3 vs o3
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
Grok 4.3 by xAI wins on 6 of 6 benchmarks against o3 by OpenAI, which leads on 0. This head-to-head comparison covers coding, math, reasoning, speed, and pricing metrics from our benchmark data.
Category-by-Category Breakdown
Coding: In coding, Grok 4.3 scores 1178 on Design Arena ELO compared to o3's 1074, while Grok 4.3 scores 1206 on Website Arena ELO compared to o3's 1048.
Context: In context, Grok 4.3 scores 1.0M on Context Length compared to o3's 200K.
Pricing Comparison
Grok 4.3 costs $1.3/1M input tokens and $2.5/1M output tokens, while o3 costs $2.0/1M input and $8.0/1M output. Grok 4.3 is the more affordable option for API usage.
Verdict
Grok 4.3 leads across the board in affordability, making it the stronger overall choice in this comparison.
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Grok 4.3 vs o3 — FAQ
Which is better, Grok 4.3 or o3?
Grok 4.3 wins on more benchmarks overall (6 vs 0). However, the best choice depends on your specific needs — each model excels in different areas.
How does Grok 4.3 compare to o3 for coding?
SWE-bench Verified data is not available for both models. Check the detailed comparison charts above for other coding-related metrics.
Is Grok 4.3 cheaper than o3?
Yes, Grok 4.3 is cheaper. Grok 4.3 costs $1.3/1M input and $2.5/1M output tokens. o3 costs $2.0/1M input and $8.0/1M output tokens.
Which is faster, Grok 4.3 or o3?
Output speed data is not available for both models. Check the speed section of the comparison above for available performance data.
What benchmarks does the Grok 4.3 vs o3 comparison cover?
This comparison covers 6 benchmarks including Input Cost, Output Cost, Context Length, Cached Input Cost, Design Arena ELO, Website Arena ELO. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.