GPT OSS 120B vs Grok Code Fast 1
Compare GPT OSS 120B by OpenAI against Grok Code Fast 1 by xAI, in 17 community votes, grok code fast 1 wins 54% of head-to-head duels, context windows of 131K vs 256K, tested across 54 shared challenges. Updated April 2026.
Which is better, GPT OSS 120B or Grok Code Fast 1?
Grok Code Fast 1 is the better choice overall, winning 54% of 17 blind community votes on Rival. GPT OSS 120B costs $0.18/M input tokens vs $0.2/M for Grok Code Fast 1. Context windows: 131K vs 256K tokens. Compare their real outputs side by side below.
Key Differences Between GPT OSS 120B and Grok Code Fast 1
GPT OSS 120B is made by openai while Grok Code Fast 1 is from xai. GPT OSS 120B has a 131K token context window compared to Grok Code Fast 1's 256K. On pricing, GPT OSS 120B costs $0.18/M input tokens vs $0.2/M for Grok Code Fast 1. In community voting, In 17 community votes, Grok Code Fast 1 wins 54% of head-to-head duels.
In 17 community votes, Grok Code Fast 1 wins 54% of head-to-head duels. GPT OSS 120B leads in Reasoning, while Grok Code Fast 1 leads in Web Design. Based on blind community voting from the Rival open dataset of 17+ human preference judgments for this pair.
Grok Code Fast 1 has the edge overall. In 17 blind votes, Grok Code Fast 1 wins 54% of the time.
Pick GPT OSS 120B for Reasoning. Pick Grok Code Fast 1 for Web Design.
Style Comparison
Grok Code Fast 1 uses 3.5x more hedging
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