OpenAI: gpt-oss-120bModel25/100 via “instruction-following with structured output formatting”
gpt-oss-120b is an open-weight, 117B-parameter Mixture-of-Experts (MoE) language model from OpenAI designed for high-reasoning, agentic, and general-purpose production use cases. It activates 5.1B parameters per forward pass and is optimized...
Unique: Trained with instruction-following fine-tuning that emphasizes schema adherence and format consistency, using MoE expert specialization where certain experts are optimized for structured output generation vs. free-form text, enabling reliable structured output without requiring external schema validation frameworks
vs others: More reliable structured output than GPT-3.5 with lower cost than GPT-4, while being faster than Claude due to sparse activation and more consistent than open-source models due to OpenAI's supervised fine-tuning on instruction-following tasks