# openai/gpt-oss-20b

Calls to the model openai/gpt-oss-20b on Together AI stopped working on September 14, 2026.

- API: Together AI (api.together.xyz)
- Model: openai/gpt-oss-20b
- Kind: Model retirement
- Takes effect: September 14, 2026
- Calls after that day: fail
- Calls it hits: `model openai/gpt-oss-20b`
- Source: [Deprecations page](https://docs.together.ai/docs/deprecations)
- Page: https://www.okapi.bot/models/together-ai/openai/gpt-oss-20b/

## What to use instead

Move to Qwen/Qwen3.5-9B, recommended by Together AI.