openai/harmony
View on GitHub ↗ ★ 4,539 Rust
Renderer for the harmony response format to be used with gpt-oss
8 mentions on Hacker News by 8 people: 1 story, 7 comments · first 2025-08-05 · latest 2026-08-09
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…approach is to use delimiters that are special tokens that can't be represented in regular text: https://github.com/openai/harmony/blob/main/docs/format.md#s... Then you train your model to take those tokens into account. Which sounds…
comment by simonw · 2026-08-09 · in Timeline of the OpenAI accidental attack against Hugging Face -
…the internal OpenAI format - the effort level is specified in the context after the <|start|> tag - https://github.com/openai/harmony Note that inference libs also have parsers that put hard limits on reasoning tokens with separate…
comment by pyentropy · 2026-06-07 · in Ask HN: How are thinking efforts implemented? -
Since GPS-OSS there is also the Harmony response format ( https://github.com/openai/harmony ) that instead of just having a system/assistant/user split in the roles, instead have system/developer/user/assistant/tool, and it seems to do a…
comment by embedding-shape · 2026-04-09 · in Claude mixes up who said what -
…seem like a snowflake, but they also decided to invent a new prompting/conversation format ( https://github.com/openai/harmony ) which definitely makes it a bit of a snowflake today, can't just use what worked a couple of days ago, but…
comment by diggan · 2025-08-07 · in Running GPT-OSS-120B at 500 tokens per second on Nvidia GPUs -
Related, link to the GH repo: https://github.com/openai/harmony
comment by sabakhoj · 2025-08-05 · in OpenAI Harmony Response Format -
…written in Rust. It looks like OpenAI is increasingly adopting Rust (at least for inference). [1] https://github.com/openai/harmony [2] https://github.com/openai/tiktoken [3] https://github.com/openai/codex
comment by lukax · 2025-08-05 · in Open models by OpenAI -
…interesting and I wonder how much of an impact it might have in performance of these models. [1] https://github.com/openai/harmony
comment by rmonvfer · 2025-08-05 · in Open models by OpenAI