Identity
- Status
- active
- Developer ID
ernie-5.1- Released
- Not reported
- Version
- ERNIE 5.1
- License
- Unknown
BaiduERNIE 5.1
ERNIE 5.1 is Baidu's current flagship text model with a 128K context window and up to 64K output tokens.
- Token context
- 131K tokens
- Inputs
- Text
- Outputs
- Text
- Released
- Not reported
Benchmark Market Position
Intelligence, Cost, and Efficiency
Rank #12 of 57
Claude Opus 5.5
GPT-5.5 Pro
Gemini 3.8 Flash- GPT-6.1 Sol
- GPT-6 Astra
Qwen3.8 Max
DeepSeek V4.1 Flash- Gemini 3.1 Pro
- GPT-5.6 Terra
Grok 4.7
- ERNIE 5.1
Kimi K3
GLM 5.3- Qwen3.8 Flash
- Qwen3.7 Plus
- DeepSeek V4 Pro
- GLM 5.3 Flash
Mistral Large 4- Gemma 4 31B
- Qwen3.8 27B
- Qwen3.5 397B A17B
Hy3- Gemma 4 26B A4B
Inkling- Mistral Large 3
- GPT-6 Luna
NVIDIA Nemotron 3 Ultra 550B A55B BF16- Inkling Small
MiniMax M3- Kimi K2.7 Code
- GPT-5.4 Mini
- Gemini 3.5 Flash Lite
- Qwen3.5 35B A3B
- GPT-5.4 Nano
Muse Glimmer 30B
Solar Pro 4- DeepSeek R1
Olmo 3 32B ThinkNova 2 Lite
Command A
Granite 4.2 30B- Granite 4.2 3B
- Granite 4.2 8B
- Llama 4 Maverick 17B 128E Instruct
- Llama 4 Scout 17B 16E Instruct
phi-4- NVIDIA Nemotron 3 Nano 30B A3B BF16
- NVIDIA Nemotron 3.5 Lightning 30B A3B
- GPT-4o
- GPT-4o Mini
- gpt-oss-120b
- gpt-oss-20b
Not ranked in current cohort
Not ranked in current cohort
The orange outline marks ERNIE 5.1. Each available panel preserves its real rank and value; missing benchmark or pricing inputs remain explicitly unranked.
Providers & Pricing
Estimate workload cost →| Provider | Input / 1M | Output / 1M | Cache read / 1M | Cache write / 1M | Observed | Evidence |
|---|---|---|---|---|---|---|
Baidu QianfanAvailable | $4.00 | $18.00 | — | — | Aug 29, 2026 | Provider-reported |
Benchmarks
All benchmark results →| LMArena Search Arenasearch-2026-10-13-a64ca3b12b6e | 1,226.72 | — | 4,024 | ernie-5.1; 95% CI [1217.24341628, 1236.18668968]; votes 4024; rank 11unknown | Original sourcewinner eligible | Third-party benchmark |
| LMArena Text Arenatext-2026-10-15-a64ca3b12b6e | 1,467.73 | — | 39,468 | ernie-5.1; 95% CI [1463.22136313, 1472.23707800]; votes 39468; rank 34unknown | Original sourcewinner eligible | Third-party benchmark |
At a Glance
Model Facts
Capacity
- Token context
- 131K tokens
- Maximum output
- 66K tokens
- Total parameters
- Unknown
- Active parameters
- Unknown
- Knowledge cutoff
- Not reported
Interface and Access
- Inputs
- Text
- Outputs
- Text
- API available
- Yes
- Open weights
- No
- Self-hostable
- No
- Reasoning
- Yes
- Vision
- No
- Tool calling
- Yes
- Capabilities
- agents, chat, reasoning, search, tools
This page represents one developer model product. Dated API snapshots, serving endpoints, pricing, regions, quantizations, and service tiers attach as versioned aliases or provider details and never create duplicate public model records.
Version Lineage
PredecessorUnknown
SuccessorsUnknown
Aliasesernie-5.1, ERNIE-5.1
Explicit Unknowns
- Release date
- Architecture
- Tokenizer
- Knowledge cutoff
Primary Evidence
Sources and Observation Date
Comparable Peers
Related Model Comparisons
| A | Pair | B | Context |
|---|---|---|---|
ERNIE 5.1Baidu | vs |  Sonar ProPerplexity | cross-developer peerstext |
ERNIE 5.1Baidu | vs | Solar Pro 4Upstage | cross-developer peerstext |
ERNIE 5.1Baidu | vs | ERNIE 4.5 0.3B PTBaidu | family variantstext |
ERNIE 5.1Baidu | vs | ERNIE X1.1Baidu | family variantstext |
ERNIE 5.1Baidu | vs | Command ACohere | cross-developer peerstext |
ERNIE 5.1Baidu | vs | Command A ReasoningCohere | cross-developer peerstext |
ERNIE 5.1Baidu | vs | Antigravity AgentGoogle DeepMind | cross-developer peerstext |
ERNIE 5.1Baidu | vs | Gemma 4 E2BGoogle DeepMind | cross-developer peerstext |
ERNIE 5.1Baidu | vs | Devstral 2 123B Instruct 2512Mistral AI | cross-developer peerstext |
ERNIE 5.1Baidu | vs | SonarPerplexity | cross-developer peerstext |
ERNIE 5.1Baidu | vs | Sonar Deep ResearchPerplexity | cross-developer peerstext |
ERNIE 5.1Baidu | vs | Sonar Reasoning ProPerplexity | cross-developer peerstext |
Questions
ERNIE 5.1 FAQs
What is ERNIE 5.1?+
ERNIE 5.1 is Baidu's current flagship text model with a 128K context window and up to 64K output tokens. It is developed by Baidu and its current sourced lifecycle status is active.
What inputs and outputs does ERNIE 5.1 support?+
ERNIE 5.1's current record lists Text as input and Text as output.
How much context does ERNIE 5.1 support?+
The current record lists a 131K-token context window and a maximum output of 66K tokens.
Is ERNIE 5.1 available through an API?+
ERNIE 5.1 is marked as API-available. The directly sourced provider records currently include Baidu Qianfan.
How much does ERNIE 5.1 cost through an API?+
The lowest directly sourced prices currently attached to ERNIE 5.1 are $4.00 per million input tokens through Baidu Qianfan and $18.00 per million output tokens through Baidu Qianfan. Prices are provider-specific and should be checked against each cited observation date.
What capabilities and tasks does ERNIE 5.1 support?+
ERNIE 5.1's recorded capabilities are agents, chat, reasoning, search, and tools. Its supported tasks are agents, reasoning, search, and text.
Can ERNIE 5.1 be self-hosted?+
ERNIE 5.1 is not marked as an open-weight model. Self-hosting is marked as unsupported, with no license recorded.
Does ERNIE 5.1 have related versions or aliases?+
No predecessor is recorded. No successor is recorded. Recorded aliases are ernie-5.1 and ERNIE-5.1.
Which models can ERNIE 5.1 be compared with?+
The current compatible peer set includes Sonar Pro, Solar Pro 4, ERNIE 4.5 0.3B PT, ERNIE X1.1, and Command A. Compatibility requires shared sourced modalities and tasks; it does not imply that one model is better. Browse model comparisons →
How current is the Model Markets record for ERNIE 5.1?+
ERNIE 5.1 was last verified Aug 29, 2026 from Baidu's primary source, “Qianfan Model List | Baidu AI Cloud.” The evidence is classified as official fact.