Model comparison
Amazon Nova 2 Pro vs Baidu ERNIE 5.1
Amazon against Baidu, compared on context, price, and verified benchmark results.
Catalog record checked September 4, 2026Individual provider fields may changeEvidence confidence: High — see receipts below
Amazon
Amazon Nova 2 Pro
Balanced
Baidu
Baidu ERNIE 5.1
Balanced
| Specification | Amazon Nova 2 Pro | Baidu ERNIE 5.1 |
|---|---|---|
| Provider | Amazon | Baidu |
| Tier | Balanced | Balanced |
| Context window | Winner: 1M | 64K |
| Max output | Not verifiedUnverified | Not verifiedUnverified |
| Input / 1M tokens | $1.25 | Winner: $0.59 |
| Output / 1M tokens | $10 | Winner: $2.65 |
| Weights | Closed | Closed |
| Parameters | Not disclosedUnverified | ~800B |
| Reasoning levels | low, medium, high | low, medium, high |
| Modalities | text, image, video | text, image |
| API model id | amazon.nova-2-pro-preview-20251202-v1:0 | ernie-5.1 |
| Released | December 2, 2025 | May 9, 2026 |
| Artificial Analysis Intelligence Index (2026-08-14) | 44 | Winner: 48 |
Prices are USD per million tokens at standard rates, excluding batch and caching discounts. Bold indicates the better figure where one is objectively better. Values we could not confirm from the provider are shown as “Not verified” rather than estimated.
Benchmark receipts
- 2026-08-14: Artificial AnalysisComposite index blending reasoning, knowledge, and coding evals into one 0–100 score. Comparability: directly comparable — AA occasionally rebaselines the index scale between snapshots — a score captured on one date is only comparable to same-snapshot scores (check measuredAt).
Pricing tiers: Amazon Nova 2 Pro: Standard tier $1.25/$10.00 per MTok (cross-region global endpoint, us-east-1 offer file published 2026-09-01); single-region +10%. Flex $0.625/$5.00; batch $0.69/$5.50; Priority $2.19/$17.50. Cached input ~$0.31 (secondary source). Still preview (id amazon.nova-2-pro-preview-20251202-v1:0). · Baidu ERNIE 5.1: $0.59 input / ~$2.65 output per MTok via Qianfan (output single-source; official USD list not retrievable). Context per Qianfan console: 64K.
Amazon Nova 2 Pro
Nova 2 Pro is Amazon's closed Bedrock flagship with a 1M-token context and multimodal input.
Best for
- AWS-native workloads
- Multimodal
- Long-context
Watch out
Bedrock-only (closed) and still preview — pricing may change at GA. Older Nova siblings are sunsetting (Premier and original Sonic EOL 2026-09-14, Canvas/Reel 2026-09-30).
Baidu ERNIE 5.1
ERNIE 5.1 is Baidu's closed flagship with ~800B params and strong Chinese-language performance.
Best for
- Chinese-language work
- Enterprise (China)
- Multimodal
Watch out
Closed API; weights not published.
When the cheaper one wins
Baidu ERNIE 5.1 is cheaper on output at $2.65 per million tokens against $10 for Amazon Nova 2 Pro — about 3.8×. Use the cheaper tier for classification, extraction, summarisation, and any task where the expensive model’s extra score does not change the accepted output. The expensive one only pays if your hardest task actually fails on the cheap tier. These are standard-tier API rates, excluding batch and cache discounts.
Run the model pickerEvidence confidence: High
How strong and complete the evidence behind this comparison is — not a prediction of which model is better.
- Pricing verified on both sides — Input and output rates are verified for both models.
- 3/5 core specs verified on both sides — Not published for at least one side: max output, parameter count.
- 1 shared named benchmark with differing scores — Measured on: Artificial Analysis Intelligence Index.
- Verified within the last 90 days — Newest catalog check was 7 days ago.
- Both models carry source citations — Each side has at least two catalog sources on record.
Source receipts
Each catalog figure was checked against the provider or an independent second source on the date shown.
- Amazon Nova 2 Pro: AWS Bedrock offer file (Nova 2.0 Pro standard $1.25/$10, published 2026-09-01) (accessed 2026-09-04)
- Amazon Nova 2 Pro: DeepLearning.AI — Nova 2 family ($1.25/$0.31/$10) (accessed 2026-09-04)
- Amazon Nova 2 Pro: AWS — Nova 2 release notes (still preview) (accessed 2026-09-04)
- Baidu ERNIE 5.1: Baidu — ERNIE 5.1 (accessed 2026-08-29)
- Baidu ERNIE 5.1: HowAIWorks — ERNIE 5.1 (accessed 2026-08-29)
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- Amazon Nova 2 Pro vs Baidu ERNIE 5.0
Diving deeper on one model? Amazon Nova 2 Pro · Baidu ERNIE 5.1
Common questions
Amazon Nova 2 Pro vs Baidu ERNIE 5.1
Answered from the verified figures on this page rather than general guidance.
Is Amazon Nova 2 Pro or Baidu ERNIE 5.1 cheaper for input?
Baidu ERNIE 5.1 is cheaper at $0.59 per million input tokens, against $1.25 for Amazon Nova 2 Pro — roughly 2.1× the price. Output tokens usually dominate a real bill, so weigh the output rate more heavily than the input rate. These are base rates; Amazon Nova 2 Pro has tiered pricing: Standard tier $1.25/$10.00 per MTok (cross-region global endpoint, us-east-1 offer file published 2026-09-01); single-region +10%. Flex $0.625/$5.00; batch $0.69/$5.50; Priority $2.19/$17.50. Cached input ~$0.31 (secondary source). Still preview (id amazon.nova-2-pro-preview-20251202-v1:0). Baidu ERNIE 5.1 has tiered pricing: $0.59 input / ~$2.65 output per MTok via Qianfan (output single-source; official USD list not retrievable). Context per Qianfan console: 64K.
Is Amazon Nova 2 Pro or Baidu ERNIE 5.1 cheaper for output?
Baidu ERNIE 5.1 is cheaper at $2.65 per million output tokens, against $10 for Amazon Nova 2 Pro — roughly 3.8× the price. Output tokens usually dominate a real bill, so weigh the output rate more heavily than the input rate. These are base rates; Amazon Nova 2 Pro has tiered pricing: Standard tier $1.25/$10.00 per MTok (cross-region global endpoint, us-east-1 offer file published 2026-09-01); single-region +10%. Flex $0.625/$5.00; batch $0.69/$5.50; Priority $2.19/$17.50. Cached input ~$0.31 (secondary source). Still preview (id amazon.nova-2-pro-preview-20251202-v1:0). Baidu ERNIE 5.1 has tiered pricing: $0.59 input / ~$2.65 output per MTok via Qianfan (output single-source; official USD list not retrievable). Context per Qianfan console: 64K.
Which has the larger context window, Amazon Nova 2 Pro or Baidu ERNIE 5.1?
Amazon Nova 2 Pro accepts 1M tokens against 64K for Baidu ERNIE 5.1. This only matters if you routinely send very long documents or large codebases.
Do Amazon Nova 2 Pro and Baidu ERNIE 5.1 support the same reasoning levels?
Yes — both accept the same effort settings: "low", "medium", "high". Higher effort costs more and takes longer, so start low and raise it only where output quality actually improves.
Should I use Amazon Nova 2 Pro or Baidu ERNIE 5.1?
Both sit in the balanced tier, so the choice usually comes down to price and context rather than capability. Amazon Nova 2 Pro suits aws-native workloads; Baidu ERNIE 5.1 suits chinese-language work.
Next step
Choosing between them
The verified figures that separate this pair, computed from the catalog rather than restated boilerplate.
- Input price: Baidu ERNIE 5.1 costs $0.59 per 1M tokens versus $1.25 for Amazon Nova 2 Pro — a 2.1x difference at the headline tier.
- Context: Amazon Nova 2 Pro takes 1M against 64K for Baidu ERNIE 5.1 — only decisive if your prompts approach the smaller window.
- Measured capability: Baidu ERNIE 5.1 leads Artificial Analysis Intelligence Index 48 to 44 (measured 2026-08-14).
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