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DeepSeek-V3.1 vs ERNIE 5.5 Flash Preview

ERNIE 5.5 Flash Preview leads the LLM Stats Score 52.3 to 21.3. DeepSeek-V3.1 is 1.2x cheaper per token.

DeepSeek · Baidu · Updated for 2026

Which is better?

ERNIE 5.5 Flash Preview leads the overall LLM Stats Score 52.3 to 21.3, 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, DeepSeek-V3.1 is roughly 1.2x 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 DeepSeek-V3.1

  • cost matters — it's about 1.2x cheaper per token
  • you need open weights you can self-host or fine-tune

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
  • you process long inputs — it offers a 1,048,576 token context window
  • you want the most recent training data — it shipped Nov 2026

At a glance

The differences that matter most.

DeepSeek-V3.1
DeepSeek
ERNIE 5.5 Flash Preview
Baidu
Core performance indexes
LLM Stats Score
21.3
#224
52.3
#13
Reasoning
21.6
#213
50.7
#12
Coding
12.3
#181
37.9
#20
Agents
-0.9
#217
38.5
#11
Cost, coverage & limits
Benchmark wins
0 of 1
1 of 1
Input price
$0.25 / M
$0.28 / M
Output price
$0.95 / M
$1.13 / M
Context window
163,840
1,048,576

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
DeepSeek-V3.1
ERNIE 5.5 Flash Preview
Research
-0.6#90
29.8#6
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

16 reported for DeepSeek-V3.1 · 13 for ERNIE 5.5 Flash Preview

1 shared

DeepSeek-V3.1 outperforms in 0 benchmarks, while ERNIE 5.5 Flash Preview is better at 1 benchmark (BrowseComp).

ERNIE 5.5 Flash Preview significantly outperforms across most benchmarks.

Sat Nov 14 2026 • llm-stats.com

Human preference

Blind head-to-head votes and playground preference scores

Pricing Analysis

Price comparison per million tokens

DeepSeek-V3.1 costs less

For input processing, DeepSeek-V3.1 ($0.25/1M tokens) is 1.1x cheaper than ERNIE 5.5 Flash Preview ($0.28/1M tokens).

For output processing, DeepSeek-V3.1 ($0.95/1M tokens) is 1.2x cheaper than ERNIE 5.5 Flash Preview ($1.13/1M tokens).

In conclusion, ERNIE 5.5 Flash Preview is more expensive than DeepSeek-V3.1.*

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

Lowest available price from all providers
Sat Nov 14 2026 • llm-stats.com
DeepSeek
DeepSeek-V3.1
Input tokens$0.25
Output tokens$0.95
Best providerDeepinfra
Baidu
ERNIE 5.5 Flash Preview
Input tokens$0.28
Output tokens$1.13
Best providerBaidu
Notice missing or incorrect data?

Model Size

Parameter count comparison

391.0B diff

DeepSeek-V3.1 has 391.0B more parameters than ERNIE 5.5 Flash Preview, making it 139.6% larger.

DeepSeek
DeepSeek-V3.1
671.0Bparameters
Baidu
ERNIE 5.5 Flash Preview
280.0Bparameters
671.0B
DeepSeek-V3.1
280.0B
ERNIE 5.5 Flash Preview

Context Window

Maximum input and output token capacity

ERNIE 5.5 Flash Preview accepts 1,048,576 input tokens compared to DeepSeek-V3.1's 163,840 tokens. ERNIE 5.5 Flash Preview can generate longer responses up to 1,048,576 tokens, while DeepSeek-V3.1 is limited to 163,840 tokens.

DeepSeek
DeepSeek-V3.1
Input163,840 tokens
Output163,840 tokens
Baidu
ERNIE 5.5 Flash Preview
Input1,048,576 tokens
Output1,048,576 tokens
Sat Nov 14 2026 • llm-stats.com

License

Usage and distribution terms

DeepSeek-V3.1 is licensed under MIT, while ERNIE 5.5 Flash Preview uses a proprietary license.

License differences may affect how you can use these models in commercial or open-source projects.

DeepSeek-V3.1

MIT

Open weights

ERNIE 5.5 Flash Preview

Proprietary

Closed source

Release Timeline

When each model was launched

DeepSeek-V3.1 was released on 2025-01-10, while ERNIE 5.5 Flash Preview was released on 2026-11-11.

ERNIE 5.5 Flash Preview is 22 months newer than DeepSeek-V3.1.

DeepSeek-V3.1

Jan 10, 2025

1.8 years ago

ERNIE 5.5 Flash Preview

Nov 11, 2026

2 days ago

1.8yr 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

DeepSeek-V3.1 is available from DeepInfra, Novita. ERNIE 5.5 Flash Preview is available from Baidu Qianfan.

DeepSeek-V3.1

deepinfra logo
Deepinfra
Input Price:Input: $0.25/1MOutput Price:Output: $0.95/1M
novita logo
Novita
Input Price:Input: $0.27/1MOutput Price:Output: $1.00/1M

ERNIE 5.5 Flash Preview

baidu logo
Baidu
Input Price:Input: $0.28/1MOutput Price:Output: $1.13/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against DeepSeek-V3.1 and ERNIE 5.5 Flash Preview side-by-side, then vote on the output you prefer.

DeepSeek-V3.1
✓ Preferred
ERNIE 5.5 Flash Preview
Open in Playground

FAQ

Common questions about DeepSeek-V3.1 vs ERNIE 5.5 Flash Preview.

Which is better, DeepSeek-V3.1 or ERNIE 5.5 Flash Preview?

ERNIE 5.5 Flash Preview leads the LLM Stats Score 52.3 to 21.3. DeepSeek-V3.1 is made by DeepSeek and ERNIE 5.5 Flash Preview is made by Baidu. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does DeepSeek-V3.1 compare to ERNIE 5.5 Flash Preview in benchmarks?

DeepSeek-V3.1 scores SimpleQA: 93.4%, MMLU-Redux: 91.8%, MMLU-Pro: 83.7%, GPQA: 74.9%, CodeForces: 69.7%. ERNIE 5.5 Flash Preview scores BrowseComp: 87.4%, DRACO: 84.9%, MCP Atlas: 84.6%, DeepSWE 1.1: 71.2%, OfficeQA Pro: 67.9%.

Is DeepSeek-V3.1 cheaper than ERNIE 5.5 Flash Preview?

DeepSeek-V3.1 is 1.1x cheaper for input tokens. DeepSeek-V3.1 costs $0.25/M input and $0.95/M output via deepinfra. ERNIE 5.5 Flash Preview costs $0.28/M input and $1.13/M output via baidu.

What are the context window sizes for DeepSeek-V3.1 and ERNIE 5.5 Flash Preview?

DeepSeek-V3.1 supports 164K tokens and ERNIE 5.5 Flash Preview supports 1.0M tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between DeepSeek-V3.1 and ERNIE 5.5 Flash Preview?

Key differences include LLM Stats Score (21.3 vs 52.3), context window (164K vs 1.0M), input pricing ($0.25 vs $0.28/M), licensing (MIT vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes DeepSeek-V3.1 and ERNIE 5.5 Flash Preview?

DeepSeek-V3.1 is developed by DeepSeek and ERNIE 5.5 Flash Preview is developed by Baidu.

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