Together AI
openai/gpt-oss-20b model retirement
Stopped workingSubscribe to Together AIShare
Together AI retired model openai/gpt-oss-20b on September 14, 2026. Calls specifying this model fail since that date. The removal impacts any requests made using model openai/gpt-oss-20b on api.together.xyz.
What to use instead of openai/gpt-oss-20b
Move to Qwen/Qwen3.5-9B, recommended by Together AI.
In Together AI's words
Removal date: 2026-09-14; Model: openai/gpt-oss-20b; Recommended replacement: Qwen/Qwen3.5-9B; Supported by on-demand dedicated endpoints: Yes
Facts
- API
- Together AI
api.together.xyz - Model
openai/gpt-oss-20b- Released
- August 5, 2025 (models.dev)
- Kind
- Model retirement
- Takes effect
- September 14, 2026
- Calls after that day
- Fail
- Source
- Deprecations page
- Last updated
- Verified
- , against Together AI's own pages
Questions
When does openai/gpt-oss-20b shut down?
Calls to the model openai/gpt-oss-20b on Together AI stopped working on September 14, 2026.
What happens to calls after September 14, 2026?
They have failed since September 14, 2026.
When was openai/gpt-oss-20b released?
openai/gpt-oss-20b was released on August 5, 2025, according to models.dev.
How do I find the calls this hits in my code?
Okapi reads your repository, finds the calls this change hits and opens a pull request with the fix. It never commits to your branches: every change comes as a pull request you review.
openai/gpt-oss-20b on other APIs 1
-
Novita AI
openai/gpt-oss-20bModel retirement Stopped working
More from Together AI 10
-
deepseek-ai/deepseek-v4-proModel retirement Stopped working -
moonshotai/kimi-k2.7-codeModel retirement Stopped working -
nvidia/nemotron-3-ultra-550b-a55bModel retirement Stopped working -
pearl-ai/gemma-4-31b-itModel retirement Stopped working -
nvidia/nemotron-3-nano-omni-30b-a3b-reasoning-bf16Model retirement Stopped working -
nvidia/nvidia-nemotron-3-super-120b-a12b-bf16Model retirement Stopped working -
qwen/qwen3.5-35b-a3b-baseModel retirement Stopped working -
google/gemma-4-31b-itModel retirement Stopped working -
intfloat/multilingual-e5-large-instructModel retirement Stopped working -
thinkingmachines/inkling-smallModel retirement Stopped working
You fixed this one by hand.
Okapi opens the pull request with the fix before the next breaking change reaches your code.