IPhO 2025
Seed2.1 Pro 79.3% Fading Models solve the theory problems of the 2025 International Physics Olympiad. Answers are graded against the official marking scheme.
Labs grade it themselves, so scores across labs may use different graders. Seed reports it for Seed2.1 Pro and Deep Think.
- Level
- Competition The strongest students, in olympiad-style contests
- Scored
- Graded by people Human experts grade or compare the outputs.
- Answers
- Written proof
Seed2.1 Pro leads with 79.3%
Best score per model as labs report them in their own cards. Labs pick their own settings, so these compare less cleanly than independent runs.
- 1 Seed2.1 Pro 79.3%
| # | Model | Score | Setting | Date | Source |
|---|---|---|---|---|---|
| 1 | Seed2.1 Pro | 79.3% | Jun 2026 | Model card |
Scores over time
All the scores we have, one dot each, so a model tested at several settings appears more than once.
Labs headline it less often now, last in Feb 2026
Launch posts from every lab that has listed it, one tick per post. Tall colored ticks include it, and short gray ones leave it out.
| Date | Launch post | Score | As the post writes it |
|---|---|---|---|
| 12 Feb 2026 |  Gemini 3 Deep Think | 2025 International Physics Olympiad written sections, gold medal-level |
One system card reports it
Besides launch posts, we read the system cards, model cards and technical reports labs publish with a release. They report far more, including safety and frontier-risk tests.
| Date | Document | Score | As the document writes it | Section |
|---|---|---|---|---|
| 23 Jun 2026 | Seed2.1 Pro model card | 79.3 | IPho 2025, Seed2.1 Pro column (Table 7). Deep Think 89.0 | Capabilities |
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