How much does ERNIE 5.1 cost?

ERNIE 5.1 costs $0.56 per million input tokens and $2.54 per million output tokens, using the list price from Aihubmix as of 26 Oct 2026. That is about $0.18 for 100 chats of about 1,000 tokens in and 500 tokens back. Confirm on the maker's site before you buy, because prices change.

What is the context window of ERNIE 5.1?

ERNIE 5.1 has a context window of 119K tokens, roughly 89,000 words of text read at once. A single answer can be up to 66K tokens long.

Is ERNIE 5.1 open source?

We list ERNIE 5.1 as closed: it is used through its maker's apps or API and its weights are not published.

How current are these numbers for ERNIE 5.1?

The newest data on this page is dated 26 Oct 2026. Scores come from Epoch AI and Arena, prices from the open LiteLLM price list.

AI Rankings

ERNIE 5.1: Score, Price and Context Window

Where ERNIE 5.1 from Baidu ranks, what it costs and how much text it can read, in plain numbers with the sources.

Data updated 26 Oct 2026

Baidu
Closed weights

Key facts

Human preference: chat: 1467; Rank 43 of 166. 39,474 votes.
Human preference: coding: 1512; Rank 47 of 166. 10,918 votes.
Price per million tokens: $0.56 in / $2.54 out; Blended $1.06. Cached input $0.56. List price from Aihubmix, checked 26 Oct 2026.
Context window: 119K tokens; About 89,000 words at once. One answer up to 66K tokens.
Weights: Closed; Used through the maker's apps or API.

Features listed by the price list: Reasoning, Prompt caching.

We do not have an Epoch Capabilities Index score and benchmark results for ERNIE 5.1 yet. It is shown as "Not measured" rather than guessed.

How ERNIE 5.1 stacks up

Each strip shows every model we track as faint bars. The dot is this model. Better is always to the right, even for price.

ERNIE 5.1 compared with all models we trackHuman preference: chat: 1467. Better than 74% of the other 165 models. Human preference: coding: 1512. Better than 72% of the other 165 models. Price: $1.06 per 1M. Cheaper than 52% of the other 200 priced models. Context window: 119K tokens. Larger context window than 18% of the other 198 models.

Human preference: chat1467
Better than 74% of the other 165 modelsUpper half
How often people pick its answers over another model's on Arena.
Human preference: coding1512
Better than 72% of the other 165 modelsUpper half
How often people pick its answers to coding questions on Arena.
Price$1.06 per 1M
Cheaper than 52% of the other 200 priced modelsUpper half
Blended price per million tokens. Lower is better, so the cheapest models sit on the right.
Context window119K tokens
Larger context window than 18% of the other 198 models
How much text it can read at once. Bigger suits long documents.

Compared with the other published models that have each measure. Data updated 26 Oct 2026.

Where ERNIE 5.1 ranks

Leaderboards it appears on, best placing first.

See all leaderboards

What it costs in everyday terms

List prices turned into amounts you can picture. Real bills depend on how you use it.

100 chats: $0.18; Cost of 100 chats assumes each chat sends 1,000 tokens (about 750 words) and gets 500 tokens (about 375 words) back.
A 300-page book: $0.06; Cost to read a 300-page book assumes about 100,000 input tokens and no reply. A real book varies with page size and language.
Blended price: $1.06 per 1M; Three parts input to one part output. Our own calculation for comparing models.

Learn more

Questions about ERNIE 5.1

How much does ERNIE 5.1 cost?: ERNIE 5.1 costs $0.56 per million input tokens and $2.54 per million output tokens, using the list price from Aihubmix as of 26 Oct 2026. That is about $0.18 for 100 chats of about 1,000 tokens in and 500 tokens back. Confirm on the maker's site before you buy, because prices change.
What is the context window of ERNIE 5.1?: ERNIE 5.1 has a context window of 119K tokens, roughly 89,000 words of text read at once. A single answer can be up to 66K tokens long.
Is ERNIE 5.1 open source?: We list ERNIE 5.1 as closed: it is used through its maker's apps or API and its weights are not published.
How current are these numbers for ERNIE 5.1?: The newest data on this page is dated 26 Oct 2026. Scores come from Epoch AI and Arena, prices from the open LiteLLM price list.

Where this data comes from

Arena (formerly LMArena): Human-preference ratings: Arena (arena.ai) leaderboard dataset, CC BY 4.0. We keep the latest published ratings, match them to models from other sources and rank them. Ratings are not changed. Arena does not endorse this site.
LiteLLM model price list: Prices and context windows: LiteLLM model price list (github.com/BerriAI/litellm, MIT licence). We use the model maker's own price entry when there is one. Prices change often, so always confirm on the maker's site before you buy.

Newest data on this page: 26 Oct 2026. Prices are list prices and change often, so confirm on the maker's site before you buy. Sponsors never change a score or an order. How we calculate this · Report a mistake