GPT-OSS 120B
OpenAI's first open-weight model — 120B params, fully downloadable
Verdict
OpenAI's 2025 open-weight release. Competitive with Llama 4 and Mistral Large 3. Fine-tunable and self-hostable, which matters more now that OpenAI is winding down its hosted fine-tuning platform. A good fit for teams that want an OpenAI-lineage model with full control.
Other Text Generation & Reasoning
- GPT-6 AstraProduction
OpenAI's most capable model — 1.05M context, 128K output
- GPT-6.1 SolProduction
The OpenAI default — near-Astra quality at a fifth of the price
- GPT-6 LunaProduction
OpenAI's efficient tier — $0.10/$0.50 with the full 1.05M context
- GPT-5.6Superseded
Previous OpenAI family — Sol/Terra/Luna tiers, superseded by GPT-6
- GPT-5Superseded
OpenAI's 2025 flagship — two families back now
- GPT-5 miniSuperseded
OpenAI's 2025 cost-efficient model — superseded by GPT-6 Luna