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01.AIProprietary·16K context·— params

Yi Lightning01-ai/yi-lightning

Yi Lightning is 01.AI's cost-efficient flagship — consistently top-5 on LMArena Chinese leaderboards at a fraction of GPT-4o pricing. Fast inference makes it a strong candidate for chat agents.

Cheapest blended:$0.14 / 1M tokenson 01.AI · 1 provider listed

Pricing across providers

Sort by:
ProviderInput /1MOutput /1MBlended /1MLatency p50FormatFreshnessAction
01.AI
yi-lightning
$0.14$0.14$0.14—OpenAI-compatibleVerified 2d agoTry →

Affiliate disclosure: We may earn a commission from qualified signups. Pricing independence is enforced at the data layer — see our Editorial Independence Policy.

Works with

Point any of these clients at a hosting's base URL — they all speak at least one of this model's endpoint protocols (OPENAI_COMPATIBLE).

Capabilities

  • chat
  • reasoning

Languages: en, zh

Code samples

Example using 01.AI — the cheapest hosting for this model as of last verification. Swap base_url and model to use a different provider from the matrix above.

from openai import OpenAI

client = OpenAI(
    api_key="YOUR_API_KEY",
    base_url="https://api.example.com/v1",
)

response = client.chat.completions.create(
    model="yi-lightning",
    messages=[{"role": "user", "content": "Hello!"}],
)
print(response.choices[0].message.content)

Technical specs

Context
16K
Max output
4K
Parameters
—
Release
—
Training cutoff
—
License
—
Official blog →

Similar models

Compare with

  • Yi Lightning vs DeepSeek Chat V3.1
    Comparison planned — not yet published
  • Yi Lightning vs DeepSeek R1
    Comparison planned — not yet published
  • Yi Lightning vs DeepSeek V3
    Comparison planned — not yet published

Frequently asked

How much does Yi Lightning cost?+
The cheapest public hosting is $0.14 per 1M blended tokens on 01.AI. 1 total providers are listed above with per-input / per-output / cached pricing.
Is Yi Lightning open-source?+
No. Yi Lightning is a proprietary model from 01.AI. Access is only via API; weights are not published.
Is Yi Lightning OpenAI-compatible?+
Most listed hostings expose an OpenAI-compatible API, so you can point an existing openai SDK client at the Provider's base_url and use the Provider's model name. See the Code Samples above for a copy-pasteable example.
What's the maximum context window for Yi Lightning?+
The model supports up to 16,384 tokens of context (input + output). Some hosted versions may impose a smaller limit — check the "Context" column in the pricing matrix for each provider.