OpenAI should release GPT-OSS-48B, with 48B total parameters and 5B active.
It should be distilled from GPT-5.5 with reasoning effort high (and medium in some cases in data).
Should be trained on a filtered Common Crawl CC-MAIN-2026-17 and a lot of more data. So it’s knowledge cutoff would be April 23, 2026 (Note: Teacher has a knowledge cutoff of December 1, 2025.)
OpenAI should pretrain GPT-OSS-2-48B on 24T tokens.
OpenAI should support 96 languages for the model (32 core languages: high-quality chat, reasoning, coding help, summaries, 32 secondary languages: usable translation, QA, simple chat, retrieval-style tasks, 32 programming languages)
32 core languages
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English
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Spanish
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French
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German
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Italian
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Portuguese
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Dutch
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Polish
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Russian
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Ukrainian
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Turkish
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Arabic
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Hebrew
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Hindi
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Bengali
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Urdu
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Persian
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Indonesian
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Malay
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Vietnamese
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Thai
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Chinese
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Japanese
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Korean
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Catalan
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Basque
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Swedish
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Norwegian
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Danish
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Finnish
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Greek
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Czech
32 secondary supported languages
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Slovak
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Slovenian
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Croatian
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Serbian
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Bulgarian
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Romanian
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Hungarian
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Lithuanian
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Latvian
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Estonian
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Irish
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Welsh
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Icelandic
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Albanian
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Macedonian
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Georgian
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Armenian
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Azerbaijani
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Kazakh
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Uzbek
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Swahili
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Yoruba
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Hausa
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Afrikaans
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Amharic
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Tamil
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Telugu
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Marathi
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Gujarati
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Kannada
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Malayalam
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Tagalog
32 supported programming languages
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Python
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JavaScript
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TypeScript
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HTML
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CSS
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SQL
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Bash / Shell
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C
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C++
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C#
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Java
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Kotlin
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Swift
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Go
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Rust
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PHP
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Ruby
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R
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Lua
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Dart
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Scala
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Objective-C
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Perl
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PowerShell
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MATLAB
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Julia
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Haskell
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Elixir
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Erlang
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Zig
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Assembly
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Fortran