Yi-Lightning Base on MMLU-Pro: score, rank and what it means
Yi-Lightning Base scores 78.5 on MMLU-Pro, placing it #227 of 600 models in the index. The benchmark average is 73.5 and the leader is GPT-5.2 Pro at 91.6.
Score distribution
The chart shows the top 10 models on MMLU-Pro, with Yi-Lightning Base highlighted. Longer bars mean higher scores.
Top 10 leaderboard
| # | Model | Provider | Context | Input / 1M | Avg score |
|---|---|---|---|---|---|
| 1 | GPT-5.2 Pro | OpenAI | 2000000 | $21.32 | 89.6 |
| 2 | GPT-5.1 Max | OpenAI | 2000000 | $20.50 | 87.9 |
| 3 | Claude Opus 4.5 Pro | Anthropic | 200000 | $20.98 | 89.1 |
| 4 | Claude Opus 4.5 Reasoning | Anthropic | 2000000 | $20.91 | 88.2 |
| 5 | Gemini 3 Pro Reasoning | Google DeepMind | 200000 | $19.69 | 87.5 |
| 6 | GPT-5.1 Reasoning | OpenAI | 400000 | $20.27 | 88.3 |
| 7 | GPT-5.2 | OpenAI | 2000000 | $19.71 | 88.0 |
| 8 | Claude Opus 4.5 Max | Anthropic | 1000000 | $20.90 | 87.8 |
| 9 | GPT-5.2 Vision | OpenAI | 1000000 | $19.03 | 87.4 |
| 10 | Gemini 3 Pro Max | Google DeepMind | 2000000 | $20.57 | 87.9 |
What this score means
On MMLU-Pro, Yi-Lightning Base sits at #227 of 600. The leader, GPT-5.2 Pro, scores 91.6, so the gap to the top is 13.1 points. The median model in this index scores 76.1, which puts Yi-Lightning Base above the midpoint.
01.AI models average 70.0 on this benchmark. Yi-Lightning Base is 8.5 points above that provider line, so it is a stronger result than the average 01.AI model.
Among open-weight models, the average is 72.1. Yi-Lightning Base is 6.4 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 78.5 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 MMLU-Pro. 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 |
|---|---|---|---|---|
| Nova Lite Reasoning | Amazon | 32768 | $9.92 | 74.3 |
| Sonar Pro | Perplexity | 128000 | $13.01 | 79.1 |
| Llama 3 Lambda | Lambda | 65536 | $3.90 | 75.6 |
| Seed-OSS Instruct | ByteDance | 128000 | $3.79 | 76.0 |
| Yi-Lightning Base | 01.AI | 16384 | $3.31 | 72.7 |
| Codestral Instruct | Mistral AI | 65536 | $4.01 | 75.1 |
| DeepSeek-Coder | DeepSeek | 32768 | $4.55 | 78.1 |
Other benchmarks for Yi-Lightning Base
| Benchmark | Score | Rank | Percentile | Relative |
|---|---|---|---|---|
| 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 | |
| MMMU | 67.2 | 357 | 41th | |
| Arena Elo | 1369.2 | 321 | 47th |
FAQ
What score does Yi-Lightning Base get on MMLU-Pro?
Yi-Lightning Base scores 78.5 on MMLU-Pro in this index. The benchmark average is 73.5 and the top score is 91.6.
How does Yi-Lightning Base rank on MMLU-Pro?
It ranks #227 of 600 models, in the 62nd percentile. The leader is GPT-5.2 Pro at 91.6.
Is Yi-Lightning Base good at MMLU-Pro?
Yes, relative to the index: it is above the median and inside the top half of scores. The result should be read alongside its price and context window.
How is the MMLU-Pro score calculated?
MMLU-Pro is a knowledge 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.