GPT-OSS 120B vs Grok 4
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
GPT-OSS 120B by OpenAI wins on 2 of 3 benchmarks against Grok 4 by xAI, which leads on 1. This head-to-head comparison covers coding, math, reasoning, speed, and pricing metrics from the AI Value Index.
Category-by-Category Breakdown
Context: In context, Grok 4 scores 256K on Context Length compared to GPT-OSS 120B's 131K.
Speed Comparison
GPT-OSS 120B generates output at 339 tok/s compared to Grok 4's 55 tok/s, and the time to first token is 440 ms for GPT-OSS 120B versus 500 ms for Grok 4. GPT-OSS 120B delivers faster throughput.
Verdict
GPT-OSS 120B leads across the board in speed, making it the stronger overall choice in this comparison.
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GPT-OSS 120B vs Grok 4 — FAQ
Which is better, GPT-OSS 120B or Grok 4?
GPT-OSS 120B wins on more benchmarks overall (2 vs 1). However, the best choice depends on your specific needs — each model excels in different areas.
How does GPT-OSS 120B compare to Grok 4 for coding?
SWE-bench Verified data is not available for both models. Check the detailed comparison charts above for other coding-related metrics.
Is GPT-OSS 120B cheaper than Grok 4?
Complete pricing data is not available for both models. Check the pricing section of the comparison above for available cost information.
Which is faster, GPT-OSS 120B or Grok 4?
GPT-OSS 120B is faster, generating output at 339 tok/s compared to 55 tok/s. Faster output speed means shorter wait times for API responses.
What benchmarks does the GPT-OSS 120B vs Grok 4 comparison cover?
This comparison covers 3 benchmarks including Output Speed, Time to First Token, Context Length. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.