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Open-Weight Models

33 summarised stories about Open-Weight Models, each linking back to the original source. Browse all topics →

Tuesday, 5 August 2025

Announcing the Availability of OpenAI's Open Models on Together AI

Together AI 11 months ago 2 sources

OpenAI released gpt-oss-120B and gpt-oss-20B open-weight reasoning models under Apache 2.0 licensing, now available on Together AI's infrastructure. The 120B model is priced at $0.15 per 1M input tokens and $0.60 per 1M output tokens with 99.9% uptime SLA. Organizations can deploy these models without vendor lock-in, fine-tune for specialized domains, and build commercial applications with full ownership.

Introducing gpt-oss

OpenAI Blog 11 months ago 2 sources

OpenAI released two open-weight language models called gpt-oss-120b and gpt-oss-20b under the Apache 2.0 license. The larger model contains 120 billion parameters while the smaller contains 20 billion parameters, both optimized to run on consumer hardware. Users can now deploy these models without licensing restrictions and benchmark them against similarly sized open alternatives on reasoning and tool-use tasks.

Estimating worst case frontier risks of open weight LLMs

OpenAI Blog 11 months ago

Researchers tested open-weight large language models by fine-tuning them to maximize capabilities in biology and cybersecurity to identify potential worst-case risks. They evaluated performance across both domains to establish a frontier of what malicious actors could achieve with publicly available model weights. The findings inform decisions about which models should remain restricted versus released as open weights.

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