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Grok 4 vs o3
Comprehensive side-by-side LLM comparison
Grok 4 leads with 4.4% higher average benchmark score. o3 offers 21.5K more tokens in context window than Grok 4. Grok 4 is $20.00 cheaper per million tokens. Both models have their strengths depending on your specific coding needs.
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xAI
Grok 4, released by xAI on July 10, 2025, is a large language model featuring first-principles reasoning and comprehensive multimodal support. It features a 260K token context window and demonstrated strong performance on advanced reasoning and coding benchmarks. Grok 4 targets complex multi-step reasoning tasks, scientific analysis, and agentic workflows via the xAI API.
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OpenAI
OpenAI o3, released by OpenAI in April 2025, is a large reasoning model that applies extended chain-of-thought processing to deliver improved performance on complex math, science, and coding tasks. It features a 200K token context window and native image understanding, with demonstrated strong results on mathematics and software engineering benchmarks. o3 targets demanding analytical and engineering tasks where deliberate, multi-step reasoning produces significantly better outcomes than direct generation.
2 months newer
o3
OpenAI
2025-04-16
Grok 4
xAI
2025-07-10
Pricing Comparison
Cost per million tokens (USD)
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Grok 4
Input:$5.00
Output:$25.00($20.00 cheaper)
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o3
Input:$10.00
Output:$40.00
Performance Metrics
Context window and performance specifications
Average performance across 2 common benchmarks
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Grok 4
Average Score:54.3%(+4.4%)
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o3
Average Score:49.9%
Performance comparison across key benchmark categories
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Grok 4
Science87.5%(+18.4%)
Agents21.1%
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o3
Provider Availability & Performance
Available providers and their performance metrics
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Grok 4
1 providers
xAI
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o3
1 providers
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Grok 4
Avg Score:54.3%(+4.4%)
Providers:1
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o3
Avg Score:49.9%
Providers:1