Models
gpt-oss for Engineers: OpenAI's Apache-Licensed Reasoning Models, and Why That's Newsworthy
An engineer's briefing on OpenAI's gpt-oss-120b and gpt-oss-20b — genuinely Apache 2.0-licensed open-weight reasoning models from a lab known for closed models, the MXFP4 quantisation story, and how to evaluate them against both closed OpenAI tiers and other open-weight competitors.
AI Playbook2026-07-2911 min readadvanced
Executive takeaway
An engineer's briefing on OpenAI's gpt-oss-120b and gpt-oss-20b — genuinely Apache 2.0-licensed open-weight reasoning models from a lab known for closed models, the MXFP4 quantisation story, and how to evaluate them against both closed OpenAI tiers and other open-weight competitors.
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