ERNIE 5.5 Flash Preview vs o4-mini
ERNIE 5.5 Flash Preview leads the LLM Stats Score 52.3 to 26.7. ERNIE 5.5 Flash Preview is 3.9x cheaper per token.
Baidu · OpenAI · Updated for 2026
Which is better?
ERNIE 5.5 Flash Preview leads the overall LLM Stats Score 52.3 to 26.7, ranking #13 overall.
In the 1 individual benchmarks reported for both models, ERNIE 5.5 Flash Preview wins 1; this is a narrower head-to-head signal than the composite indexes.
On price, ERNIE 5.5 Flash Preview is roughly 3.9x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
ERNIE 5.5 Flash Preview also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose ERNIE 5.5 Flash Preview
- overall performance matters — it scores 52.3 and ranks #13 on LLM Stats
- your work emphasizes reasoning and coding — it leads those capability indexes
- you value its reported benchmark strengths — it wins 1 of 1 exact shared results
- cost matters — it's about 3.9x cheaper per token
- you process long inputs — it offers a 1,048,576 token context window
- you want the most recent training data — it shipped Nov 2026
Choose o4-mini
- you want predictable pricing at $1.10/M input and $4.40/M output
At a glance
The differences that matter most.
Capability indexes
Additional strengths measured across groups of related public benchmarks
Individual benchmarks
13 reported for ERNIE 5.5 Flash Preview · 14 for o4-mini
ERNIE 5.5 Flash Preview outperforms in 1 benchmarks (BrowseComp), while o4-mini is better at 0 benchmarks.
ERNIE 5.5 Flash Preview significantly outperforms across most benchmarks.
Human preference
Blind head-to-head votes and playground preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, ERNIE 5.5 Flash Preview ($0.28/1M tokens) is 3.9x cheaper than o4-mini ($1.10/1M tokens).
For output processing, ERNIE 5.5 Flash Preview ($1.13/1M tokens) is 3.9x cheaper than o4-mini ($4.40/1M tokens).
In conclusion, o4-mini is more expensive than ERNIE 5.5 Flash Preview.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
ERNIE 5.5 Flash Preview accepts 1,048,576 input tokens compared to o4-mini's 200,000 tokens. ERNIE 5.5 Flash Preview can generate longer responses up to 1,048,576 tokens, while o4-mini is limited to 100,000 tokens.
Input capabilities
Documented input modalities across available providers
o4-mini supports multimodal inputs, whereas ERNIE 5.5 Flash Preview does not.
o4-mini can handle both text and other forms of data like images, making it suitable for multimodal applications.
ERNIE 5.5 Flash Preview
o4-mini
License
Usage and distribution terms
Both models are licensed under proprietary licenses.
Both models have usage restrictions defined by their respective organizations.
Proprietary
Closed source
Proprietary
Closed source
Release Timeline
When each model was launched
ERNIE 5.5 Flash Preview was released on 2026-11-11, while o4-mini was released on 2025-04-16.
ERNIE 5.5 Flash Preview is 19 months newer than o4-mini.
Nov 11, 2026
1 days ago
1.6yr newerApr 16, 2025
1.6 years ago
Knowledge Cutoff
When training data ends
o4-mini has a documented knowledge cutoff of 2024-05-31, while ERNIE 5.5 Flash Preview's cutoff date is not specified.
We can confirm o4-mini's training data extends to 2024-05-31, but cannot make a direct comparison without ERNIE 5.5 Flash Preview's cutoff date.
—
May 2024
Provider Availability
ERNIE 5.5 Flash Preview is available from Baidu Qianfan. o4-mini is available from OpenAI.
ERNIE 5.5 Flash Preview
o4-mini
Outputs Comparison
Judge for yourself.
Run your own prompts against ERNIE 5.5 Flash Preview and o4-mini side-by-side, then vote on the output you prefer.
FAQ
Common questions about ERNIE 5.5 Flash Preview vs o4-mini.