ERNIE 5.1 vs Sonar Deep Research

This comparison does not currently contain a protocol-matched coding benchmark for both ERNIE 5.1 and Sonar Deep Research, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.

ERNIE 5.1 is $4.00 and Sonar Deep Research is $2.00 per million tokens, so Sonar Deep Research is cheaper on this metric. ERNIE 5.1 is $18.00 and Sonar Deep Research is $8.00 per million tokens, so Sonar Deep Research is cheaper on this metric.

ERNIE 5.1 has the larger sourced context window. ERNIE 5.1 supports 131,072 tokens and Sonar Deep Research supports 128,000 tokens.

There is no overall benchmark winner: At least two independently verified, protocol-matched benchmarks are required for an overall winner.

Both models have the same sourced self-hosting status: unsupported. ERNIE 5.1 is not marked open weight; Sonar Deep Research is not marked open weight.

ERNIE 5.1 is not documented with image input; Sonar Deep Research is not documented with image input. This reflects supported input modalities, not vision quality.

ERNIE 5.1 has a sourced maximum output of 65,536 tokens; Sonar Deep Research's maximum output is not reported. A larger limit cannot be determined.

ERNIE 5.1: reasoning and tool calling. Sonar Deep Research: reasoning. Feature support does not establish relative quality.

ERNIE 5.1 has 1 sourced provider route; Sonar Deep Research has 2, so Sonar Deep Research has broader tracked availability.

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.