Ko-AIME 2025 (Upstage)
Solar Open 2 97.7% leads since Jul 2026 Fading Models solve AIME 2025 competition problems in Korean. Upstage built the set in house.
The technical report lists it only as an in-house Korean math benchmark. The Korean framing is read from its name.
- Level
- Competition The strongest students, in olympiad-style contests
- Scored
- Checked automatically A program checks the result against an answer key, unit tests or the expected final state.
- Answers
- Short answer A number, word or short string matched to a key.
Solar Open 2 leads with 97.7%
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 Solar Open 2 97.7%
- 2 Solar Open 100B 80%
| # | Model | Score | Setting | Date | Source |
|---|---|---|---|---|---|
| 1 | Solar Open 2 | 97.7% | Jul 2026 | Model card | |
| 2 | Solar Open 100B | 80% | Dec 2025 | Model card |
2 models have held number one since its release in Jul 2026
Lab claims count from the day the card came out, independent runs from the model’s release.
The best score passed 85% in Jul 2026
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 Jul 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 |
|---|---|---|---|
| 22 Jul 2026 | Solar Open 2 | 97.7 | Ko-AIME’25 (in-house) |
| 31 Dec 2025 | Solar Open 100B | 80 | Ko-AIME 2025 (in-house) |
2 system cards report it, from 1 lab
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 |
|---|---|---|---|---|
| 22 Jul 2026 | Solar Open 2 technical report | 97.7 | Ko-AIME'25, in-house (Table 4) | Capabilities |
| 11 Jan 2026 | Solar Open 100B technical report | 80 | Ko-AIME 2025 (in-house) (Table 5) | Capabilities |
More in Math
- IMO-AnswerBench In use 400 olympiad problems with short verifiable answers, robustified against memorization. Scored by answer match. GLM-5.2 91%
- AIME 2026 In use Models solve the 30 integer-answer problems from the 2026 AIME I and II math competitions. Scored by exact answer match. GPT-5.5 100%
- HMMT 2026 In use Models solve the 33 final-answer problems from the February 2026 Harvard-MIT Mathematics Tournament. Scored by exact answer match. GPT-5.5 98.5%
- MathArena (Apex, IMO, USAMO) In use Evaluates models on newly released math competitions after release. Final-answer or human/LLM-judged proof scores. Claude Opus 4.8 81.3%
- PolyMath In use Models solve 9,000 parallel math problems in 18 languages across four difficulty levels, from school math to frontier math. Final answers are checked.
Qwen3.7-Max 86.5% - USAMO 2026 In use Models write full proofs for the six problems of the 2026 USA Mathematical Olympiad. Judges grade each proof from 0 to 7 against rubrics. GPT-5.5 98.2%