Model Comparison

o3-mini vs ERNIE 4.5Which is better in 2026?

o3-mini significantly outperforms across most benchmarks. ERNIE 4.5 is 1.5x cheaper per token.

Verdict: o3-mini vs ERNIE 4.5 — which is better?

o3-mini (by OpenAI) and ERNIE 4.5 (by Baidu) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

o3-mini outperforms in 4 benchmarks (GPQA, MATH, MMLU, SimpleQA), while ERNIE 4.5 is better at 0 benchmarks. o3-mini significantly outperforms across most benchmarks.

On price, ERNIE 4.5 is roughly 1.5x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

o3-mini also accepts a larger context window (200,000 input tokens), making it the stronger choice for long documents and large codebases.

Choose o3-mini if…

  • you want the strongest raw capability — it leads on 4 of 4 shared benchmarks
  • you process long inputs — it offers a 200,000 token context window

Choose ERNIE 4.5 if…

  • cost matters — it's about 1.5x cheaper per token
  • you want the most recent training data — it shipped Jun 2025
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Performance Benchmarks

Comparative analysis across standard metrics

4 benchmarks

o3-mini outperforms in 4 benchmarks (GPQA, MATH, MMLU, SimpleQA), while ERNIE 4.5 is better at 0 benchmarks.

o3-mini significantly outperforms across most benchmarks.

Mon Jun 15 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

ERNIE 4.5 costs less

For input processing, o3-mini ($1.10/1M tokens) is 2.8x more expensive than ERNIE 4.5 ($0.40/1M tokens).

For output processing, o3-mini ($4.40/1M tokens) is 1.1x more expensive than ERNIE 4.5 ($4.00/1M tokens).

In conclusion, o3-mini is more expensive than ERNIE 4.5.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Mon Jun 15 2026 • llm-stats.com
OpenAI
o3-mini
Input tokens$1.10
Output tokens$4.40
Best providerAzure
Baidu
ERNIE 4.5
Input tokens$0.40
Output tokens$4.00
Best providerNovita
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

o3-mini accepts 200,000 input tokens compared to ERNIE 4.5's 128,000 tokens. o3-mini can generate longer responses up to 100,000 tokens, while ERNIE 4.5 is limited to 65,536 tokens.

OpenAI
o3-mini
Input200,000 tokens
Output100,000 tokens
Baidu
ERNIE 4.5
Input128,000 tokens
Output65,536 tokens
Mon Jun 15 2026 • llm-stats.com

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

o3-mini

Proprietary

Closed source

ERNIE 4.5

Proprietary

Closed source

Release Timeline

When each model was launched

o3-mini was released on 2025-01-30, while ERNIE 4.5 was released on 2025-06-25.

ERNIE 4.5 is 5 months newer than o3-mini.

o3-mini

Jan 30, 2025

1.4 years ago

ERNIE 4.5

Jun 25, 2025

11 months ago

4mo newer

Knowledge Cutoff

When training data ends

o3-mini has a documented knowledge cutoff of 2023-09-30, while ERNIE 4.5's cutoff date is not specified.

We can confirm o3-mini's training data extends to 2023-09-30, but cannot make a direct comparison without ERNIE 4.5's cutoff date.

o3-mini

Sep 2023

ERNIE 4.5

—

Provider Availability

o3-mini is available from Azure, OpenAI. ERNIE 4.5 is available from Novita.

o3-mini

azure logo
Azure
Input Price:Input: $1.10/1MOutput Price:Output: $4.40/1M
openai logo
OpenAI
Input Price:Input: $1.10/1MOutput Price:Output: $4.40/1M

ERNIE 4.5

novita logo
Novita
Input Price:Input: $0.40/1MOutput Price:Output: $4.00/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

OpenAI
Larger context window (200,000 tokens)
Higher GPQA score (77.2% vs 74.0%)
Higher MATH score (97.9% vs 12.4%)
Higher MMLU score (86.9% vs 41.9%)
Higher SimpleQA score (15.0% vs 1.8%)
Baidu
Less expensive input tokens
Less expensive output tokens

Detailed Comparison

AI Model Comparison Table
Feature
OpenAI
o3-mini
Baidu
ERNIE 4.5

FAQ

Common questions about o3-mini vs ERNIE 4.5.

Which is better, o3-mini or ERNIE 4.5?

o3-mini significantly outperforms across most benchmarks. o3-mini is made by OpenAI and ERNIE 4.5 is made by Baidu. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does o3-mini compare to ERNIE 4.5 in benchmarks?

o3-mini scores COLLIE: 98.7%, MATH: 97.9%, IFEval: 93.9%, MGSM: 92.0%, AIME 2024: 87.3%. ERNIE 4.5 scores GPQA: 74.0%, ARC-E: 60.7%, PIQA: 55.2%, Winogrande: 51.3%, CLUEWSC: 48.6%.

Is o3-mini cheaper than ERNIE 4.5?

ERNIE 4.5 is 2.8x cheaper for input tokens. o3-mini costs $1.10/M input and $4.40/M output via azure. ERNIE 4.5 costs $0.40/M input and $4.00/M output via novita.

What are the context window sizes for o3-mini and ERNIE 4.5?

o3-mini supports 200K tokens and ERNIE 4.5 supports 128K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between o3-mini and ERNIE 4.5?

Key differences include context window (200K vs 128K), input pricing ($1.10 vs $0.40/M). See the full comparison above for benchmark-by-benchmark results.

Who makes o3-mini and ERNIE 4.5?

o3-mini is developed by OpenAI and ERNIE 4.5 is developed by Baidu.

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