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GPT-5.3 Codex vs InternS1
Comprehensive side-by-side LLM comparison
InternS1 supports multimodal inputs. Both models have their strengths depending on your specific coding needs.
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OpenAI
GPT-5.3 Codex, released by OpenAI in February 2026, is a coding-specialized large language model from the GPT-5.3 family. It targets software engineering workflows including automated code generation, test writing, and agentic multi-file editing, built on the incremental improvements of the GPT-5.3 generation.
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Shanghai AI Lab
InternS1, released by Shanghai AI Laboratory at WAIC 2025 on July 26, 2025, is a multimodal scientific reasoning large language model designed for advanced problem-solving across mathematics, physics, chemistry, and related domains. It supports text, image, and potentially other scientific data formats as input, and demonstrated strong performance on competition-level scientific benchmarks. InternS1 targets open-source scientific research, STEM education, and applications requiring deep domain reasoning across natural science disciplines.
6 months newer
InternS1
Shanghai AI Lab
2025-07-26
GPT-5.3 Codex
OpenAI
2026-02
Provider Availability & Performance
Available providers and their performance metrics
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GPT-5.3 Codex
0 providers
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InternS1
0 providers
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GPT-5.3 Codex
Avg Score:0.0%
Providers:0
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InternS1
Avg Score:0.0%
Providers:0