OpenAI· GPT / ChatGPT / APIOpen-weight release

Introducing gpt-oss

OpenAI released two open-weight language models, gpt-oss-120b and gpt-oss-20b, under the Apache 2.0 license, claiming strong real-world performance at low cost.

From the source

We’re releasing gpt-oss-120b and gpt-oss-20b—two state-of-the-art open-weight language models that deliver strong real-world performance at low cost. Available under the flexible Apache 2.0 license

openai.com

Announced

05 Aug 2025 00:00 UTC

Detected

03 Aug 2026 21:11 UTC (+363d after)

License

Apache 2.0