Yi-Lightning Chat: pricing, context window and benchmarks
Yi-Lightning Chat is a multimodal model from 01.AI. It offers a 32,768-token context window, costs $3.79 per million input tokens and $19.14 per million output tokens, and averages 75.5 across the index's benchmark suite.
Pricing
Yi-Lightning Chat costs $3.79 per million input tokens and $19.14 per million output tokens. A blended 3:1 input-to-output mix works out to about $7.63 per million tokens. Cached input is listed at $0.30 per million tokens.
| Item | Price | Notes |
|---|---|---|
| Input | $3.79 | per 1M tokens |
| Output | $19.14 | per 1M tokens |
| Cached input | $0.30 | per 1M tokens |
| Blended 3:1 | $7.63 | estimate per 1M tokens |
| 1M in + 1M out | $22.93 | estimate |
Benchmarks
Scores below are modelled estimates on a 0–100 scale. Use them to compare relative position, not as official vendor results.
| Benchmark | Score | Rank | Percentile | Relative |
|---|---|---|---|---|
| MMLU-Pro | 77.3 | 270 | 55th | |
| GPQA Diamond | 69.8 | 274 | 54th | |
| SWE-bench Verified | 62.6 | 266 | 56th | |
| HumanEval | 80.0 | 234 | 61th | |
| MATH-500 | 81.3 | 184 | 69th | |
| AIME 2025 | 69.4 | 270 | 55th | |
| LiveCodeBench | 67.5 | 239 | 60th | |
| IFEval | 83.5 | 234 | 61th | |
| TruthfulQA | 77.8 | 262 | 56th | |
| HellaSwag | 86.7 | 189 | 69th | |
| MMMU | 74.2 | 182 | 70th | |
| Arena Elo | 1378.6 | 279 | 54th |
What Yi-Lightning Chat is good for
Yi-Lightning Chat is an open-weight model, so it can be self-hosted or run through a third-party inference provider. That matters for data residency, fine-tuning and long-run cost control. At $3.79 per million input tokens (hosted list price) and a 32,768-token context window, it is a practical option for teams that want more control than a closed API allows.
Strengths
- Input price of $3.79 per million tokens is at or below the index median.
- Open weights make self-hosting, fine-tuning and data-residency review possible.
- Accepts more than text, including image input where the provider supports it.
Trade-offs
- No standout weakness in the indexed specifications, but real-world behaviour still needs testing.
How it compares
| Model | Provider | Context | Input / 1M | Avg score |
|---|---|---|---|---|
| Llama 3 Lambda | Lambda | 65536 | $3.90 | 75.6 |
| Llama 3 Novita Instruct | Novita AI | 32768 | $3.94 | 75.6 |
| Magistral Base | Mistral AI | 65536 | $3.86 | 75.6 |
| Reka Flash Reasoning | Reka AI | 32768 | $10.70 | 75.6 |
| Llama 3 DeepInfra Instruct | DeepInfra | 65536 | $3.84 | 75.5 |
| Yi-Lightning Chat | 01.AI | 32768 | $3.79 | 75.5 |
FAQ
How much does Yi-Lightning Chat cost?
Yi-Lightning Chat is listed at $3.79 per million input tokens and $19.14 per million output tokens. Cached input is $0.30 per million tokens. A blended 3:1 input-to-output mix is about $7.63 per million tokens.
What is the context window of Yi-Lightning Chat?
Yi-Lightning Chat has a context window of 32,768 tokens and can emit up to 32,768 output tokens per request in this index.
Is Yi-Lightning Chat open weights?
Yes. Yi-Lightning Chat is listed as an open-weight model under a open weights licence.
How does Yi-Lightning Chat score on benchmarks?
Yi-Lightning Chat averages 75.5 across the scored benchmarks in this index, ranking #239 of 600 models. Its strongest relative result is Arena Elo at 1378.6.
What is Yi-Lightning Chat best for?
Yi-Lightning Chat is an open-weight model, so it can be self-hosted or run through a third-party inference provider. That matters for data residency, fine-tuning and long-run cost control. At $3.79 per million input tokens (hosted list price) and a 32,768-token context window, it is a practical option for teams that want more control than a closed API allows.