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OpenAI: gpt-oss-120b (exacto)

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Match confidence: UnmatchedSource type: openrouter_only
Context window
131.1K
Arena overall rank
Input price
$0.000 / 1M
Output price
$0.000 / 1M

Identifiers & provenance

Primary ID
openai/gpt-oss-120b:exacto
OpenRouter ID
openai/gpt-oss-120b:exacto
Canonical slug
openai/gpt-oss-120b

Source semantics

  • Arena rank is a human-preference leaderboard signal, not a universal truth metric.
  • OpenRouter usage/popularity reflects adoption/traffic, not benchmark quality.
  • Pricing fields may differ by provider and can include extra modes beyond prompt/completion.

Read more on Methodology & data sources.

Description

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 to run on a single H100 GPU with native MXFP4 quantization. The model supports configurable reasoning depth, full chain-of-thought access, and native tool use, including function calling, browsing, and structured output generation.

Raw fields snapshot

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OpenAI: gpt-oss-120b (exacto) · NNZen