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Claude 3 Opus vs GPT OSS 120B
Comprehensive side-by-side LLM comparison
Claude 3 Opus leads with 29.1% higher average benchmark score. Claude 3 Opus offers 137.9K more tokens in context window than GPT OSS 120B. GPT OSS 120B is $89.46 cheaper per million tokens. Claude 3 Opus supports multimodal inputs. GPT OSS 120B is available on 5 providers. Overall, Claude 3 Opus is the stronger choice for coding tasks.
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Anthropic
Claude 3 Opus is a multimodal language model developed by Anthropic. This model demonstrates exceptional performance with an average score of 81.6% across 11 benchmarks. It excels particularly in ARC-C (96.4%), HellaSwag (95.4%), GSM8k (95.0%). 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 OSS 120B is a language model developed by OpenAI. It achieves strong performance with an average score of 61.7% across 7 benchmarks. It excels particularly in MMLU (90.0%), CodeForces (87.4%), GPQA (80.1%). It supports a 262K token context window for handling large documents. The model is available through 5 API providers. It's licensed for commercial use, making it suitable for enterprise applications. Released in 2025, it represents OpenAI's latest advancement in AI technology.
1 year newer
Claude 3 Opus
Anthropic
2024-02-29
GPT OSS 120B
OpenAI
2025-08-05
Pricing Comparison
Cost per million tokens (USD)
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Claude 3 Opus
Input:$15.00
Output:$75.00
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GPT OSS 120B
Input:$0.09
Output:$0.45($89.46 cheaper)
Performance Metrics
Context window and performance specifications
Average performance across 16 common benchmarks
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Claude 3 Opus
Average Score:56.1%(+29.1%)
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GPT OSS 120B
Average Score:27.0%
Provider Availability & Performance
Available providers and their performance metrics
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Claude 3 Opus
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 Opus
Avg Score:56.1%(+29.1%)
Providers:3
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GPT OSS 120B
Avg Score:27.0%
Providers:5