Yi-Lightning Base on MMMU: score, rank and what it means
Yi-Lightning Base scores 67.2 on MMMU, placing it #357 of 600 models in the index. The benchmark average is 67.1 and the leader is GPT-5.2 Max at 86.9.
Score distribution
The chart shows the top 10 models on MMMU, with Yi-Lightning Base highlighted. Longer bars mean higher scores.
Top 10 leaderboard
| # | Model | Provider | Context | Input / 1M | Avg score |
|---|---|---|---|---|---|
| 1 | GPT-5.2 Max | OpenAI | 1000000 | $21.39 | 89.2 |
| 2 | GPT-5.1 Reasoning | OpenAI | 400000 | $20.27 | 88.3 |
| 3 | GPT-5.2 | OpenAI | 2000000 | $19.71 | 88.0 |
| 4 | Claude Sonnet 4.5 Reasoning | Anthropic | 400000 | $19.48 | 87.7 |
| 5 | GPT-5.1 Max | OpenAI | 2000000 | $20.50 | 87.9 |
| 6 | Grok 4 Pro | xAI | 1000000 | $19.00 | 85.4 |
| 7 | Claude Opus 4.5 Reasoning | Anthropic | 2000000 | $20.91 | 88.2 |
| 8 | Claude Sonnet 4.5 Pro | Anthropic | 1000000 | $18.73 | 86.7 |
| 9 | GPT-5.2 Pro | OpenAI | 2000000 | $21.32 | 89.6 |
| 10 | GPT-5.2 Vision | OpenAI | 1000000 | $19.03 | 87.4 |
What this score means
On MMMU, Yi-Lightning Base sits at #357 of 600. The leader, GPT-5.2 Max, scores 86.9, so the gap to the top is 19.7 points. The median model in this index scores 70.0, which puts Yi-Lightning Base below the midpoint.
01.AI models average 63.2 on this benchmark. Yi-Lightning Base is 4.0 points above that provider line, so it is a stronger result than the average 01.AI model.
Among open-weight models, the average is 65.1. Yi-Lightning Base is 2.1 points above that group. This is the more useful comparison if you are shortlisting within the same tier rather than across the whole index.
Read a 67.2 as a relative signal, not an absolute guarantee. Benchmark scores depend on prompt format, evaluation harness and contamination controls. Use this page to narrow the shortlist, then test the model on your own data.
Price context
At $3.31 per million input tokens, Yi-Lightning Base is below the median input price of $4.00 across the 600 models scored on MMMU. The models immediately around it in the ranking are shown below so you can compare score and price together.
| Model | Provider | Context | Input / 1M | Avg score |
|---|---|---|---|---|
| Firesearch | Fireworks AI | 32768 | $7.03 | 68.5 |
| Firefunction Reasoning | Fireworks AI | 8192 | $9.08 | 72.5 |
| Firesearch Max | Fireworks AI | 8192 | $7.80 | 69.9 |
| Sonar Pro Mini | Perplexity | 8192 | $8.02 | 70.3 |
| Yi-Lightning Base | 01.AI | 16384 | $3.31 | 72.7 |
| Llama 3.1 Turbo Base | Together AI | 16384 | $3.30 | 73.0 |
| Phi-4 Base | Microsoft | 32768 | $3.15 | 71.2 |
Other benchmarks for Yi-Lightning Base
| Benchmark | Score | Rank | Percentile | Relative |
|---|---|---|---|---|
| MMLU-Pro | 78.5 | 227 | 62th | |
| GPQA Diamond | 65.7 | 348 | 42th | |
| SWE-bench Verified | 62.0 | 282 | 53th | |
| HumanEval | 77.5 | 299 | 50th | |
| MATH-500 | 77.0 | 282 | 53th | |
| AIME 2025 | 70.6 | 247 | 59th | |
| LiveCodeBench | 61.5 | 356 | 41th | |
| IFEval | 80.0 | 333 | 45th | |
| TruthfulQA | 77.9 | 257 | 57th | |
| HellaSwag | 81.9 | 353 | 41th | |
| Arena Elo | 1369.2 | 321 | 47th |
FAQ
What score does Yi-Lightning Base get on MMMU?
Yi-Lightning Base scores 67.2 on MMMU in this index. The benchmark average is 67.1 and the top score is 86.9.
How does Yi-Lightning Base rank on MMMU?
It ranks #357 of 600 models, in the 41st percentile. The leader is GPT-5.2 Max at 86.9.
Is Yi-Lightning Base good at MMMU?
It is below the median for this benchmark, so test it carefully before relying on it for this capability. The result should be read alongside its price and context window.
How is the MMMU score calculated?
MMMU is a multimodal benchmark. Scores in this index are modelled estimates on a 0–100 scale (or Elo for Arena), derived from capability tier and benchmark difficulty. They are not official leaderboard results.
What does Yi-Lightning Base cost?
Yi-Lightning Base costs $3.31 per million input tokens and $16.31 per million output tokens.