ERNIE 5.1 review, price and benchmarks (2026)

public paid api info-only multilingual enterprise

Provider

Statuspublic

AA Intelligence Index~38 (WhichAI estimate)

Releasedn/a

Context windown/a

Modalitiesn/a

API price $/1M (in / out)n/a

Speedn/a

AccessBaidu cloud & apps (closed weights)

The score shown is a WhichAI estimate from adjacent benchmarks, not an official measurement.

In one line

Baidu's flagship stays closed and China-centric - competitive domestically, rarely benchmarked on Western boards.

Coding64

Reasoning64

Writing60

Agents & tools58

Category scores (0-100) are WhichAI blended ratings: public category leaderboards plus editorial judgment. Guidance, not official measurements.

Alternatives worth a look

MiniMax M2.7 (MiniMax) · AA 38.1Open weights · API hosts
GPT-5.4 nano (OpenAI) · AA 38.2API (cheapest OpenAI tier)
Nemotron 3 Ultra (NVIDIA) · AA 37.8FREE on OpenRouter (nvidia/nemotron-3-ultra-550b-a55b:free - WhichAI default runner) · open weights · Perplexity Pro

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Artificial Analysis Intelligence Index, 2026 rebased scale (top models ≈ 55–60). Snapshot: July 24, 2026 (BenchLM mirror), retrieved July 26, 2026. Context, price and release data come from vendor pages and public pricing mirrors (retrieved July 19, 2026). Missing values are not published or not yet verified - shown as -. Sources are linked inside the app (Model guide and About > Methodology).