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GPT-5 vs Grok Code Fast 1
Comprehensive side-by-side LLM comparison
GPT-5 leads with 4.1% higher average benchmark score. GPT-5 offers 262.0K more tokens in context window than Grok Code Fast 1. Grok Code Fast 1 is $9.55 cheaper per million tokens. GPT-5 supports multimodal inputs. Both models have their strengths depending on your specific coding needs.
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OpenAI
GPT-5 represents the next generation of OpenAI's foundational models, developed to advance the frontier of AI capabilities in reasoning, knowledge, and general intelligence. Built to push beyond the limitations of GPT-4, it incorporates architectural and training improvements designed to enhance performance across diverse tasks and domains.
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xAI
Grok Code Fast was developed as a specialized coding model optimized for speed, designed to provide rapid code completion, generation, and assistance. Built to serve developers requiring quick feedback and iterative coding support, it combines programming expertise with low-latency responses.
21 days newer
GPT-5
OpenAI
2025-08-07
Grok Code Fast 1
xAI
2025-08-28
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Pricing Comparison
Cost per million tokens (USD)
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GPT-5
Input:$1.25
Output:$10.00
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Grok Code Fast 1
Input:$0.20
Output:$1.50($9.55 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 1 common benchmarks
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GPT-5
Average Score:74.9%(+4.1%)
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Grok Code Fast 1
Average Score:70.8%
Performance comparison across key benchmark categories
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GPT-5
Coding74.9%(+4.1%)
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Grok Code Fast 1
Coding70.8%
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Knowledge Cutoff
Training data recency comparison
GPT-5
2024-09-30
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
2 providers
OpenAI
Throughput: 100 tok/s
Latency: 2ms
ZeroEval
Throughput: 100 tok/s
Latency: 2ms
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GPT-5
Avg Score:74.9%(+4.1%)
Providers:2
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Grok Code Fast 1
Avg Score:70.8%
Providers:1