Model Comparison

ERNIE 4.5 vs GPT-5.1 Thinking

GPT-5.1 Thinking significantly outperforms across most benchmarks. ERNIE 4.5 is 2.6x cheaper per token.

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Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

ERNIE 4.5 outperforms in 0 benchmarks, while GPT-5.1 Thinking is better at 1 benchmark (GPQA).

GPT-5.1 Thinking significantly outperforms across most benchmarks.

Thu Apr 16 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

ERNIE 4.5 costs less

For input processing, ERNIE 4.5 ($0.40/1M tokens) is 3.1x cheaper than GPT-5.1 Thinking ($1.25/1M tokens).

For output processing, ERNIE 4.5 ($4.00/1M tokens) is 2.5x cheaper than GPT-5.1 Thinking ($10.00/1M tokens).

In conclusion, GPT-5.1 Thinking is more expensive than ERNIE 4.5.*

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

Lowest available price from all providers
Thu Apr 16 2026 • llm-stats.com
Baidu
ERNIE 4.5
Input tokens$0.40
Output tokens$4.00
Best providerNovita
OpenAI
GPT-5.1 Thinking
Input tokens$1.25
Output tokens$10.00
Best providerOpenAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

GPT-5.1 Thinking accepts 400,000 input tokens compared to ERNIE 4.5's 128,000 tokens. GPT-5.1 Thinking can generate longer responses up to 128,000 tokens, while ERNIE 4.5 is limited to 65,536 tokens.

Baidu
ERNIE 4.5
Input128,000 tokens
Output65,536 tokens
OpenAI
GPT-5.1 Thinking
Input400,000 tokens
Output128,000 tokens
Thu Apr 16 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

GPT-5.1 Thinking supports multimodal inputs, whereas ERNIE 4.5 does not.

GPT-5.1 Thinking can handle both text and other forms of data like images, making it suitable for multimodal applications.

ERNIE 4.5

Text
Images
Audio
Video

GPT-5.1 Thinking

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

ERNIE 4.5

Proprietary

Closed source

GPT-5.1 Thinking

Proprietary

Closed source

Release Timeline

When each model was launched

ERNIE 4.5 was released on 2025-06-25, while GPT-5.1 Thinking was released on 2025-11-12.

GPT-5.1 Thinking is 5 months newer than ERNIE 4.5.

ERNIE 4.5

Jun 25, 2025

9 months ago

GPT-5.1 Thinking

Nov 12, 2025

5 months ago

4mo newer

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Provider Availability

ERNIE 4.5 is available from Novita. GPT-5.1 Thinking is available from OpenAI.

ERNIE 4.5

novita logo
Novita
Input Price:Input: $0.40/1MOutput Price:Output: $4.00/1M

GPT-5.1 Thinking

openai logo
OpenAI
Input Price:Input: $1.25/1MOutput Price:Output: $10.00/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

Baidu
Less expensive input tokens
Less expensive output tokens
OpenAI
Larger context window (400,000 tokens)
Supports multimodal inputs
Higher GPQA score (88.1% vs 74.0%)

Detailed Comparison

AI Model Comparison Table
Feature
Baidu
ERNIE 4.5
OpenAI
GPT-5.1 Thinking

FAQ

Common questions about ERNIE 4.5 vs GPT-5.1 Thinking

GPT-5.1 Thinking significantly outperforms across most benchmarks. ERNIE 4.5 is made by Baidu and GPT-5.1 Thinking is made by OpenAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.
ERNIE 4.5 scores GPQA: 74.0%, ARC-E: 60.7%, PIQA: 55.2%, Winogrande: 51.3%, CLUEWSC: 48.6%. GPT-5.1 Thinking scores Tau2 Telecom: 95.6%, AIME 2025: 94.0%, BrowseComp Long Context 128k: 90.0%, GPQA: 88.1%, MMMU: 85.4%.
ERNIE 4.5 is 3.1x cheaper for input tokens. ERNIE 4.5 costs $0.40/M input and $4.00/M output via novita. GPT-5.1 Thinking costs $1.25/M input and $10.00/M output via openai.
ERNIE 4.5 supports 128K tokens and GPT-5.1 Thinking supports 400K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.
Key differences include context window (128K vs 400K), input pricing ($0.40 vs $1.25/M), multimodal support (no vs yes). See the full comparison above for benchmark-by-benchmark results.
ERNIE 4.5 is developed by Baidu and GPT-5.1 Thinking is developed by OpenAI.