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Claude 3 Sonnet vs GPT-5 Codex
Comprehensive side-by-side LLM comparison
Claude 3 Sonnet leads with 61.5% higher average benchmark score. Claude 3 Sonnet supports multimodal inputs. Claude 3 Sonnet is available on 3 providers. Overall, Claude 3 Sonnet is the stronger choice for coding tasks.
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Anthropic
Claude 3 Sonnet is a multimodal language model developed by Anthropic. It achieves strong performance with an average score of 73.8% across 11 benchmarks. It excels particularly in ARC-C (93.2%), GSM8k (92.3%), HellaSwag (89.0%). It supports a 400K token context window for handling large documents. The model is available through 3 API providers. As a multimodal model, it can process and understand text, images, and other input formats seamlessly. Released in 2024, it represents Anthropic's latest advancement in AI technology.
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OpenAI
GPT-5 Codex is a language model developed by OpenAI. It achieves strong performance with an average score of 74.5% across 1 benchmarks. Notable strengths include SWE-Bench Verified (74.5%). Released in 2025, it represents OpenAI's latest advancement in AI technology.
1 year newer
Claude 3 Sonnet
Anthropic
2024-02-29
GPT-5 Codex
OpenAI
2025-09-15
Performance Metrics
Context window and performance specifications
Average performance across 12 common benchmarks
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Claude 3 Sonnet
Average Score:67.7%(+61.5%)
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GPT-5 Codex
Average Score:6.2%
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Knowledge Cutoff
Training data recency comparison
GPT-5 Codex
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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Claude 3 Sonnet
3 providers
Anthropic
Throughput: 100 tok/s
Latency: 0.5ms
Bedrock
Throughput: 120 tok/s
Latency: 0.5ms
Throughput: 42 tok/s
Latency: 0.4ms
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Claude 3 Sonnet
Avg Score:67.7%(+61.5%)
Providers:3
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GPT-5 Codex
Avg Score:6.2%
Providers:0