Model · Multimodal language model
o3-pro
A higher-compute version of the o3 reasoning line, served only through the Responses API under the OpenAI Services Agreement without downloadable model weights; OpenAI recommends the GPT-5.6 Sol line at reasoning.mode pro.
- Developer
- OpenAI
- Distribution
- Developer API
- Artifact licensing
- Proprietary access
- License scope
- Reviewed release artifacts and mandatory terms; not an assessment of training code or training data openness.
- Licenses
- OpenAI Services Agreement
- Boundary
- This record represents the o3-pro release identified by the dated snapshot o3-pro-2025-06-10, announced June 2025. OpenAI announced its deprecation and documents the shutdown date of December 11, 2026 with the GPT-5.6 Sol line at reasoning.mode pro as the recommended replacement. The o3 and o3-mini lines it derives from, the later GPT-5 family, the OpenAI platform, and ChatGPT remain separate product or service boundaries.
Risk statements
The developer publishes no risk-threshold statement for this release. Absence is not evidence of safety.
Page the reviewer checked ↗ · 2026-10-09 · Research confidence: Medium
Open in the directory → Open official model page ↗
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