ERNIE 5.1 vs Sonar Pro
At a Glance
| Compare |  ERNIE 5.1Baidu |  Sonar ProPerplexity |
|---|---|---|
| Intelligence, Cost, and Efficiency | ||
| IntelligenceHigher is better · MM Intelligence v4.4 | #12 of 5773.5 score · 1/3 sources · single-source provisional · missing LiveBench, ARC-AGI-2 · full-core range 24.5–91.2 | UnrankedNot in the 57-model eligible cohort |
| Pricing and Limits | ||
| Input priceFrom · USD / 1M tokens | Not reported | $3.00Openrouter ↗ · Oct 19, 2026 |
| Output priceFrom · USD / 1M tokens | Not reported | $15.00Openrouter ↗ · Oct 19, 2026 |
| Context windowMaximum documented tokens | 131K | 200K |
| Model facts checked | Aug 29, 2026View model evidence → | Aug 29, 2026View model evidence → |
Token prices are the lowest available sourced USD rates; input and output may use different providers. Cost ranking estimates output spend on LiveBench, not a full request bill. Ranking methodology →
Available Benchmarks
| Benchmark | ERNIE 5.1 | Sonar Pro |
|---|---|---|
| LMArena Search Arenasearch-2026-10-13-a64ca3b12b6e · arena_rating · leader | 1,226.72100% of row best · rating · ernie-5.1; 95% CI [1217.24341628, 1236.18668968]; votes 4024; rank 11 | 1,130.2892% of row best · rating · ppl-sonar-pro-high; 95% CI [1124.47147876, 1136.08107434]; votes 28899; rank 39 |
| Overall ResultCounted from the protocol-matched rows above | 1 benchmark winNo overall winner | 0 benchmark winsNo overall winner |
Third-party benchmark Only like-for-like primary-publisher results are shown; raw scores, relative scores, configuration, and token spend remain visible.
Side-by-Side Facts
| Field | ERNIE 5.1 | Sonar Pro |
|---|---|---|
| Developer | Baidu | Perplexity |
| Family | Ernie 5 | Sonar |
| Model | ERNIE 5.1 | Sonar Pro |
| Version | ERNIE 5.1 | Sonar Pro |
| Lifecycle | active | active |
| Released | Unknown | Unknown |
| Knowledge cutoff | Unknown | Unknown |
| Input modalities | Text | Text |
| Output modalities | Text | Text |
| Context window | 131K | 200K |
| Total parameters | Unknown | Unknown |
| Active parameters | Unknown | Unknown |
| License | Unknown | Unknown |
| Open weights | No | No |
| API available | Yes | Yes |
| Self-hostable | No | No |
| Provider access | Baidu Qianfan (Standard) | Openrouter (Standard), Perplexity (Standard) |
| Capabilities | agents, chat, reasoning, search, tools | chat, citations, search |
ERNIE 5.1 Capabilities
Sonar Pro Capabilities
Related Comparisons
All text comparisons →| A | Pair | B | Context |
|---|---|---|---|
ERNIE 5.1Baidu | vs |  Solar Pro 4Upstage | cross-developer peerstext |
ERNIE-4.5-0.3B-PTBaidu | vs | ERNIE 5.1Baidu | 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 |
Primary Evidence
Sources and Freshness
Questions
ERNIE 5.1 vs Sonar Pro FAQs
Is ERNIE 5.1 or Sonar Pro better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both ERNIE 5.1 and Sonar Pro, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, ERNIE 5.1 or Sonar Pro?+
ERNIE 5.1 is $4.00 and Sonar Pro is $3.00 per million tokens, so Sonar Pro is cheaper on this metric. ERNIE 5.1 is $18.00 and Sonar Pro is $15.00 per million tokens, so Sonar Pro is cheaper on this metric.
Which has a larger context window, ERNIE 5.1 or Sonar Pro?+
Sonar Pro has the larger sourced context window. ERNIE 5.1 supports 131,072 tokens and Sonar Pro supports 200,000 tokens.
Which performs better in benchmarks, ERNIE 5.1 or Sonar Pro?+
There is no overall benchmark winner: At least two independently verified, protocol-matched benchmarks are required for an overall winner.
Can ERNIE 5.1 or Sonar Pro be self-hosted?+
Both models have the same sourced self-hosting status: unsupported. ERNIE 5.1 is not marked open weight; Sonar Pro is not marked open weight.
Can ERNIE 5.1 and Sonar Pro understand images?+
ERNIE 5.1 is not documented with image input; Sonar Pro is not documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, ERNIE 5.1 or Sonar Pro?+
ERNIE 5.1 has a sourced maximum output of 65,536 tokens; Sonar Pro's maximum output is not reported. A larger limit cannot be determined.
Do ERNIE 5.1 and Sonar Pro support reasoning and tool use?+
ERNIE 5.1: reasoning and tool calling. Sonar Pro: none of these features are definitively sourced. Feature support does not establish relative quality.
Which is available from more inference providers, ERNIE 5.1 or Sonar Pro?+
ERNIE 5.1 has 1 sourced provider route; Sonar Pro has 2, so Sonar Pro has broader tracked availability.
Which offers better value, ERNIE 5.1 or Sonar Pro?+
There is no universal value winner. Compare the input and output prices above with the matched benchmark result for your workload: cheaper tokens can be offset by different quality, token usage, latency, or provider availability.