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GPT-OSS-120B vs Grok 3
Comprehensive side-by-side LLM comparison
Both models show comparable benchmark performance. Grok 3 offers 884.3K more tokens in context window than GPT-OSS-120B. Grok 3 is $Infinity cheaper per million tokens. Grok 3 supports multimodal inputs. Both models have their strengths depending on your specific coding needs.
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OpenAI
GPT-OSS-120B, released by OpenAI in August 2025, is an open-weight large language model with 120 billion parameters distributed under the Apache 2.0 license. It represents OpenAI's entry into the open-source model space, enabling developers to self-host and fine-tune a GPT-5-generation-class model. GPT-OSS-120B targets research applications, on-premises deployments, and custom fine-tuning workflows requiring a large open-weight base model.
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xAI
Grok 3, released by xAI in February 2025, is a large language model trained on xAI's Colossus supercluster with substantially increased compute over previous generations. It features a 1M token context window, RL-enhanced Think mode for extended reasoning, and demonstrated strong results on mathematics, coding, and scientific benchmarks. Grok 3 targets complex reasoning, real-time information tasks via X platform integration, and agentic workflows via the xAI API.
5 months newer
Grok 3
xAI
2025-02-17
GPT-OSS-120B
OpenAI
2025-08
Pricing Comparison
Cost per million tokens (USD)
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GPT-OSS-120B
Input:$Infinity
Output:$Infinity
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Grok 3
Input:$3.00
Output:$15.00($Infinity cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 1 common benchmarks
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GPT-OSS-120B
Average Score:1.6%(+0.3%)
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Grok 3
Average Score:1.3%
Performance comparison across key benchmark categories
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GPT-OSS-120B
Agents1.6%(+0.3%)
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Grok 3
Agents1.3%
Provider Availability & Performance
Available providers and their performance metrics
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GPT-OSS-120B
1 providers
Hugging Face
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Grok 3
1 providers
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GPT-OSS-120B
Avg Score:1.6%(+0.3%)
Providers:1
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Grok 3
Avg Score:1.3%
Providers:1