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GPT-5 vs Grok 3
Comprehensive side-by-side LLM comparison
GPT-5 leads with 49.1% higher average benchmark score. Grok 3 offers 583.6K more tokens in context window than GPT-5. Grok 3 is $132.00 cheaper per million tokens. Overall, GPT-5 is the stronger choice for coding tasks.
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OpenAI
GPT-5, released by OpenAI on August 7, 2025, is a large language model that combines direct generation and extended reasoning in a single unified system with a built-in routing mechanism. It features a 400K token context window, 128K maximum output tokens, native multimodal support (text, image, audio, video), and demonstrated strong results across coding, mathematics, visual understanding, and health benchmarks at release. GPT-5 targets complex multi-step tasks including advanced coding, mathematical problem solving, and long-context analysis.
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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-5
OpenAI
2025-08-07
Pricing Comparison
Cost per million tokens (USD)
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GPT-5
Input:$30.00
Output:$120.00
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Grok 3
Input:$3.00
Output:$15.00($132.00 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 2 common benchmarks
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GPT-5
Average Score:49.3%(+49.1%)
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Grok 3
Average Score:0.1%
Performance comparison across key benchmark categories
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GPT-5
Agents20.1%(+18.8%)
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Grok 3
Agents1.3%
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Knowledge Cutoff
Training data recency comparison
GPT-5
2025-05
More recent knowledge cutoff means awareness of newer technologies and frameworks
Provider Availability & Performance
Available providers and their performance metrics
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GPT-5
1 providers
OpenAI
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Grok 3
1 providers
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GPT-5
Avg Score:49.3%(+49.1%)
Providers:1
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Grok 3
Avg Score:0.1%
Providers:1