ERNIE 5.1 vs Grok 4.5
Model Markets Rankings
Intelligence, Cost, and Efficiency
| Ranking | ERNIE 5.1 | Grok 4.5 |
|---|---|---|
| CostLower is better · Published-token output estimate | UnrankedNot in the 36-model eligible cohort | #14 of 36$0.063 per LiveBench case |
Ranks come from the current complete eligible cohorts. Green highlights appear only when both models are ranked in the same metric. Missing required inputs remain unranked, and the three dimensions are not collapsed into an overall winner.
Benchmark Performance
Available Benchmarks
| Benchmark | ERNIE 5.1 | Grok 4.5 |
|---|---|---|
| LMArena Search Arenasearch-2026-08-24-011508720696 · arena_rating · statistical tie | 1,226.96100% of row best · rating · ernie-5.1; 95% CI [1217.24505738, 1236.67203321]; votes 3788; rank 6 | 1,212.6599% of row best · rating · grok-4.5; 95% CI [1205.78347274, 1219.50889748]; votes 31505; rank 8 |
| LMArena Text Arenatext-2026-09-01-011508720696 · arena_rating · leader | 1,468.10100% of row best · rating · ernie-5.1; 95% CI [1463.48233336, 1472.72453179]; votes 37137; rank 25 | 1,451.8299% of row best · rating · grok-4.5; 95% CI [1446.90989155, 1456.73122428]; votes 25873; rank 39 |
| Overall ResultCounted from the protocol-matched rows above · 1 tie | 1 benchmark winOverall lead | 0 benchmark wins |
Third-party benchmark Only like-for-like primary-publisher results are shown; raw scores, relative scores, configuration, and token spend remain visible.
Technical Differences
Side-by-Side Facts
| Field | ERNIE 5.1 | Grok 4.5 |
|---|---|---|
| Developer | Baidu | xAI |
| Family | Ernie 5 | Grok 4 |
| Model | ERNIE 5.1 | Grok 4.5 |
| Version | ERNIE 5.1 | Grok 4.5 |
| Lifecycle | active | active |
| Released | Unknown | 2026-07-16 |
| Knowledge cutoff | Unknown | Unknown |
| Input modalities | Text | Text, Image |
| Output modalities | Text | Text |
| Context window | 131K | 500K |
| 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) | Xai (Standard) |
| Capabilities | agents, chat, reasoning, search, tools | chat, generation, reasoning, structured_outputs, tools |
13 comparable fields · 8 material differences · Pair passes the primary-source comparison gate
ERNIE 5.1 Capabilities
Grok 4.5 Capabilities
Internal Comparison Graph
Related Comparisons
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|---|---|---|---|
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Claude Fable 5.1Anthropic | vs | ERNIE 5.1Baidu | cross-developer peerstext |
ERNIE 5.1Baidu | vs |  Gemini 3.1 ProGoogle DeepMind | cross-developer peerstext |
ERNIE 5.1Baidu | vs |  DeepSeek-V4-ProDeepSeek | cross-developer peerstext |
ERNIE 5.1Baidu | vs | Grok 4.6xAI | cross-developer peerstext |
ERNIE 5.1Baidu | vs |  Qwen3.8-MaxQwen | cross-developer peerstext |
ERNIE 5.1Baidu | vs |  Kimi-K3Moonshot AI | cross-developer peerstext |
 MiniMax-M3MiniMax | vs | ERNIE 5.1Baidu | cross-developer peerstext |
ERNIE 5.1Baidu | vs |  GLM-5.3Z.ai | cross-developer peerstext |
ERNIE 5.1Baidu | vs |  Hy4 previewTencent | cross-developer peerstext |
ERNIE 5.1Baidu | vs | Seed 2.1 ProByteDance Seed | cross-developer peerstext |
ERNIE 5.1Baidu | vs |  Mistral Large 3Mistral AI | cross-developer peerstext |
Primary Evidence
Sources and Freshness
Questions
ERNIE 5.1 vs Grok 4.5 FAQs
Is ERNIE 5.1 or Grok 4.5 better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both ERNIE 5.1 and Grok 4.5, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, ERNIE 5.1 or Grok 4.5?+
ERNIE 5.1 is $4.00 and Grok 4.5 is $2.00 per million tokens, so Grok 4.5 is cheaper on this metric. ERNIE 5.1 is $18.00 and Grok 4.5 is $6.00 per million tokens, so Grok 4.5 is cheaper on this metric.
Which has a larger context window, ERNIE 5.1 or Grok 4.5?+
Grok 4.5 has the larger sourced context window. ERNIE 5.1 supports 131K and Grok 4.5 supports 500K.
Which performs better in benchmarks, ERNIE 5.1 or Grok 4.5?+
There is no overall benchmark winner: An overall winner requires at least two decisive benchmarks from at least two original publishers.
Can ERNIE 5.1 or Grok 4.5 be self-hosted?+
Both models have the same recorded self-hosting status: unsupported. ERNIE 5.1 is not marked open weight; Grok 4.5 is not marked open weight.
Can ERNIE 5.1 and Grok 4.5 understand images?+
ERNIE 5.1 is not documented with image input; Grok 4.5 is documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, ERNIE 5.1 or Grok 4.5?+
Neither has a larger sourced maximum output. ERNIE 5.1 is 66K and Grok 4.5 is —.
Do ERNIE 5.1 and Grok 4.5 support reasoning and tool use?+
ERNIE 5.1: reasoning and tool calling. Grok 4.5: reasoning, tool calling, and image input. Feature support does not establish relative quality.
Which is available from more inference providers, ERNIE 5.1 or Grok 4.5?+
ERNIE 5.1 has 1 sourced provider route; Grok 4.5 has 1, a tie.
Which offers better value, ERNIE 5.1 or Grok 4.5?+
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.