+
+
+
+
+
+
+
+
VS
VS
VS
VS
VS
VS
Claude Opus 4.1 vs GPT-OSS-120B
Comprehensive side-by-side LLM comparison
Both models show comparable benchmark performance. Claude Opus 4.1 offers 99.9K more tokens in context window than GPT-OSS-120B. Claude Opus 4.1 is $Infinity cheaper per million tokens. Claude Opus 4.1 supports multimodal inputs. Claude Opus 4.1 is available on 3 providers. Both models have their strengths depending on your specific coding needs.
+
+
+
+
Anthropic
Claude Opus 4.1, released by Anthropic in August 2025, is a large language model from the Claude 4 family optimized for demanding reasoning, multi-step coding, and extended analysis tasks. It features a 200K token context window, 32K maximum output tokens, native image understanding, and extended thinking capabilities. Opus 4.1 targets complex problem-solving, multi-turn reasoning workflows, and applications requiring deep analysis with integrated tool use.
+
+
+
+
OpenAI
GPT-OSS-120B, released by OpenAI in August 2025, is an open-weight large language model with 120 billion parameters distributed under the Apache 2.0 license. It represents OpenAI's entry into the open-source model space, enabling developers to self-host and fine-tune a GPT-5-generation-class model. GPT-OSS-120B targets research applications, on-premises deployments, and custom fine-tuning workflows requiring a large open-weight base model.
4 days newer
GPT-OSS-120B
OpenAI
2025-08
Claude Opus 4.1
Anthropic
2025-08-05
Pricing Comparison
Cost per million tokens (USD)
+
+
+
+
Claude Opus 4.1
Input:$15.00
Output:$75.00($Infinity cheaper)
+
+
+
+
GPT-OSS-120B
Input:$Infinity
Output:$Infinity
Performance Metrics
Context window and performance specifications
Average performance across 2 common benchmarks
+
+
+
+
Claude Opus 4.1
Average Score:40.9%(+1.0%)
+
+
+
+
GPT-OSS-120B
Average Score:39.9%
Performance comparison across key benchmark categories
+
+
+
+
Claude Opus 4.1
Science80.9%(+2.6%)
Agents0.9%
+
+
+
+
GPT-OSS-120B
+
+
+
+
Knowledge Cutoff
Training data recency comparison
Claude Opus 4.1
2025-01
More recent knowledge cutoff means awareness of newer technologies and frameworks
Provider Availability & Performance
Available providers and their performance metrics
+
+
+
+
Claude Opus 4.1
3 providers
Anthropic
AWS Bedrock
Google Cloud Vertex AI
+
+
+
+
GPT-OSS-120B
+
+
+
+
Claude Opus 4.1
Avg Score:40.9%(+1.0%)
Providers:3
+
+
+
+
GPT-OSS-120B
Avg Score:39.9%
Providers:1