Yi-Lightning 1.5B on HumanEval: score, rank and what it means
Yi-Lightning 1.5B scores 51.0 on HumanEval, placing it #567 of 600 models in the index. The benchmark average is 74.0 and the leader is GPT-5.2 Pro at 96.8.
Score distribution
The chart shows the top 10 models on HumanEval, with Yi-Lightning 1.5B 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 | Gemini 3 Pro Pro | Google DeepMind | 200000 | $19.80 | 87.3 |
| 3 | o4 Max | OpenAI | 2000000 | $19.51 | 86.2 |
| 4 | Grok 4 Reasoning | xAI | 2000000 | $19.67 | 87.8 |
| 5 | Claude Opus 4.5 | Anthropic | 400000 | $19.42 | 87.7 |
| 6 | GPT-5.2 Max | OpenAI | 1000000 | $21.39 | 89.2 |
| 7 | Claude Opus 4.5 Pro | Anthropic | 200000 | $20.98 | 89.1 |
| 8 | Grok 4 Max | xAI | 2000000 | $19.70 | 86.6 |
| 9 | GPT-5.2 Turbo | OpenAI | 1000000 | $20.73 | 87.4 |
| 10 | GPT-5.1 Reasoning | OpenAI | 400000 | $20.27 | 88.3 |
What this score means
On HumanEval, Yi-Lightning 1.5B sits at #567 of 600. The leader, GPT-5.2 Pro, scores 96.8, so the gap to the top is 45.8 points. The median model in this index scores 77.4, which puts Yi-Lightning 1.5B below the midpoint.
01.AI models average 69.1 on this benchmark. Yi-Lightning 1.5B is 18.1 points below that provider line, so it is a weaker result than the average 01.AI model.
Among small open-weight models, the average is 56.7. Yi-Lightning 1.5B is 5.7 points below that group. This is the more useful comparison if you are shortlisting within the same tier rather than across the whole index.
Read a 51.0 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 $0.54 per million input tokens, Yi-Lightning 1.5B is below the median input price of $4.00 across the 600 models scored on HumanEval. 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 |
|---|---|---|---|---|
| Arctic 7B | Snowflake | 8192 | $0.49 | 50.3 |
| Molmo 7B | Allen Institute for AI | 32768 | $0.42 | 49.3 |
| Nemotron Nano 8B | NVIDIA | 8192 | $0.46 | 48.1 |
| Mixtral 1.5B | Mistral AI | 16384 | $0.36 | 47.7 |
| Yi-Lightning 1.5B | 01.AI | 4096 | $0.54 | 50.0 |
| Mistral Small 3 1.5B | Mistral AI | 32768 | $0.42 | 49.2 |
| Phi-4 1.5B | Microsoft | 8192 | $0.42 | 48.1 |
Other benchmarks for Yi-Lightning 1.5B
| Benchmark | Score | Rank | Percentile | Relative |
|---|---|---|---|---|
| MMLU-Pro | 58.2 | 549 | 9th | |
| GPQA Diamond | 48.1 | 538 | 10th | |
| SWE-bench Verified | 35.8 | 547 | 9th | |
| MATH-500 | 49.2 | 561 | 7th | |
| AIME 2025 | 35.0 | 570 | 5th | |
| LiveCodeBench | 35.8 | 566 | 6th | |
| IFEval | 62.0 | 554 | 8th | |
| TruthfulQA | 56.6 | 560 | 7th | |
| HellaSwag | 69.7 | 539 | 10th | |
| MMMU | 48.4 | 560 | 7th | |
| Arena Elo | 1209.1 | 544 | 9th |
FAQ
What score does Yi-Lightning 1.5B get on HumanEval?
Yi-Lightning 1.5B scores 51.0 on HumanEval in this index. The benchmark average is 74.0 and the top score is 96.8.
How does Yi-Lightning 1.5B rank on HumanEval?
It ranks #567 of 600 models, in the 6th percentile. The leader is GPT-5.2 Pro at 96.8.
Is Yi-Lightning 1.5B good at HumanEval?
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 HumanEval score calculated?
HumanEval is a coding 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 1.5B cost?
Yi-Lightning 1.5B costs $0.54 per million input tokens and $2.52 per million output tokens.