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ERNIE 4.5 21B A3B Thinking vs o4 Mini Deep Research (Comparative Analysis)

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Comparative Analysis: ERNIE 4.5 21B A3B Thinking vs. o4 Mini Deep Research
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Overview

ERNIE 4.5 21B A3B Thinking was released 1 day before o4 Mini Deep Research.
ERNIE 4.5 21B A3B ThinkingERNIE 4.5 21B A3B Thinking
o4 Mini Deep Researcho4 Mini Deep Research
Model Provider
The organization behind this AI's development
Baidu logoBaidu
OpenAI logoOpenAI
Input Context Window
Maximum input tokens this model can process at once
131.1K
tokens
200K
tokens
Output Token Limit
Maximum output tokens this model can generate at once
65.5K
tokens
100K
tokens
Release Date
When this model first became publicly available
October 9th, 2025
October 10th, 2025

Capabilities & Features

Compare supported features, modalities, and advanced capabilities
ERNIE 4.5 21B A3B Thinking
o4 Mini Deep Research
Input Types
Supported input formats
📝Text
📁File🖼️Image📝Text
Output Types
Supported output formats
📝Text
📝Text
Tokenizer
Text encoding system
OtherGPT
Key Features
Advanced capabilities
Function CallingStructured OutputReasoning ModeContent Moderation
Function CallingStructured OutputReasoning ModeContent Moderation
Open Source
Model availability
Available on HuggingFace →Proprietary

Pricing

ERNIE 4.5 21B A3B Thinking is roughly 0.03x less expensive compared to o4 Mini Deep Research for input tokens and roughly 0.03x less expensive for output tokens.
ERNIE 4.5 21B A3B ThinkingERNIE 4.5 21B A3B Thinking
o4 Mini Deep Researcho4 Mini Deep Research
Input Token Cost
Cost per million input tokens
$0.06
per million tokens
$2.00
per million tokens
Output Token Cost
Cost per million outut tokens
$0.22
per million tokens
$8.00
per million tokens

Benchmarks

Compare relevant benchmarks between ERNIE 4.5 21B A3B Thinking and o4 Mini Deep Research.
ERNIE 4.5 21B A3B ThinkingERNIE 4.5 21B A3B Thinking
o4 Mini Deep Researcho4 Mini Deep Research
MMLU
Measures knowledge across 57 subjects like law, math, history, and science
Benchmark not available.
Benchmark not available.
MMMU
Measures understanding of combined text and images across various domains
Benchmark not available.
Benchmark not available.
HellaSwag
Measures common sense reasoning by having models complete sentences about everyday situations
Benchmark not available.
Benchmark not available.

At a Glance

Quick overview of what makes ERNIE 4.5 21B A3B Thinking and o4 Mini Deep Research unique.
Baidu logoERNIE 4.5 21B A3B Thinking by Baidu offers advanced reasoning. It can handle standard conversations with its 131.1K token context window. Very affordable at $0.06/M input and $0.22/M output tokens. Released October 9th, 2025.
OpenAI logoo4 Mini Deep Research by OpenAI understands both text and images, can use external tools and APIs, offers advanced reasoning, generates structured data. It can handle standard conversations with its 200K token context window. Reasonably priced at $2.00/M input and $8.00/M output tokens. Includes built-in content moderation for safer outputs. Released October 10th, 2025.

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