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GPT-4.5 vs Grok Code Fast 1
Comprehensive side-by-side LLM comparison
Grok Code Fast 1 leads with 32.8% higher average benchmark score. Grok Code Fast 1 offers 133.9K more tokens in context window than GPT-4.5. Grok Code Fast 1 is $223.30 cheaper per million tokens. GPT-4.5 supports multimodal inputs. Overall, Grok Code Fast 1 is the stronger choice for coding tasks.
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OpenAI
GPT-4.5 was developed as an intermediate advancement between GPT-4 and GPT-5, designed to incorporate incremental improvements in reasoning, factuality, and instruction-following. Built to bridge generational capabilities while maintaining compatibility with existing applications, it represents a refinement of the GPT-4 architecture with enhanced performance characteristics.
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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.
6 months newer
GPT-4.5
OpenAI
2025-02-27
Grok Code Fast 1
xAI
2025-08-28
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Pricing Comparison
Cost per million tokens (USD)
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GPT-4.5
Input:$75.00
Output:$150.00
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Grok Code Fast 1
Input:$0.20
Output:$1.50($223.30 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 1 common benchmarks
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GPT-4.5
Average Score:38.0%
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Grok Code Fast 1
Average Score:70.8%(+32.8%)
Performance comparison across key benchmark categories
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GPT-4.5
Coding38.0%
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Grok Code Fast 1
Coding70.8%(+32.8%)
Provider Availability & Performance
Available providers and their performance metrics
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GPT-4.5
1 providers
OpenAI
Throughput: 50 tok/s
Latency: 20ms
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Grok Code Fast 1
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GPT-4.5
Avg Score:38.0%
Providers:1
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Grok Code Fast 1
Avg Score:70.8%(+32.8%)
Providers:1