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o3 vs UI-TARS-2
Comprehensive side-by-side LLM comparison
UI-TARS-2 leads with 30.1% higher average benchmark score. Overall, UI-TARS-2 is the stronger choice for coding tasks.
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OpenAI
OpenAI o3, released by OpenAI in April 2025, is a large reasoning model that applies extended chain-of-thought processing to deliver improved performance on complex math, science, and coding tasks. It features a 200K token context window and native image understanding, with demonstrated strong results on mathematics and software engineering benchmarks. o3 targets demanding analytical and engineering tasks where deliberate, multi-step reasoning produces significantly better outcomes than direct generation.
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ByteDance
UI-TARS-2, released by ByteDance in September 2025, is a major generational upgrade of the UI-TARS family of GUI interaction models, with enhanced capabilities across computer control, game environments, code generation, and tool use. It targets agentic workflows requiring robust multimodal understanding of graphical interfaces across diverse application domains.
4 months newer
o3
OpenAI
2025-04-16
UI-TARS-2
ByteDance
2025-09-04
Performance Metrics
Context window and performance specifications
Average performance across 1 common benchmarks
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o3
Average Score:23.0%
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UI-TARS-2
Average Score:53.1%(+30.1%)
Performance comparison across key benchmark categories
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o3
Agents23.0%
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UI-TARS-2
Agents53.1%(+30.1%)
Provider Availability & Performance
Available providers and their performance metrics
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o3
1 providers
OpenAI
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UI-TARS-2
0 providers
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o3
Avg Score:23.0%
Providers:1
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UI-TARS-2
Avg Score:53.1%(+30.1%)
Providers:0