ERNIE 5.5 Flash Preview vs o1-preview
ERNIE 5.5 Flash Preview leads the LLM Stats Score 52.3 to 15.9. ERNIE 5.5 Flash Preview is 53.3x 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 15.9, ranking #13 overall.
On price, ERNIE 5.5 Flash Preview is roughly 53.3x 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
- cost matters — it's about 53.3x 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 o1-preview
- you want predictable pricing at $15.00/M input and $60.00/M output
At a glance
The differences that matter most.
Individual benchmarks
13 reported for ERNIE 5.5 Flash Preview · 8 for o1-preview
ERNIE 5.5 Flash Preview and o1-previewdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.
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 53.6x cheaper than o1-preview ($15.00/1M tokens).
For output processing, ERNIE 5.5 Flash Preview ($1.13/1M tokens) is 53.1x cheaper than o1-preview ($60.00/1M tokens).
In conclusion, o1-preview 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 o1-preview's 128,000 tokens. ERNIE 5.5 Flash Preview can generate longer responses up to 1,048,576 tokens, while o1-preview is limited to 32,768 tokens.
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 o1-preview was released on 2024-09-12.
ERNIE 5.5 Flash Preview is 26 months newer than o1-preview.
Nov 11, 2026
1 days ago
2.2yr newerSep 12, 2024
2.2 years ago
Knowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
ERNIE 5.5 Flash Preview is available from Baidu Qianfan. o1-preview is available from OpenAI, Azure.
ERNIE 5.5 Flash Preview
o1-preview
Outputs Comparison
Judge for yourself.
Run your own prompts against ERNIE 5.5 Flash Preview and o1-preview side-by-side, then vote on the output you prefer.
FAQ
Common questions about ERNIE 5.5 Flash Preview vs o1-preview.