Seed 1.8 vs Sonar Deep Research

This comparison does not currently contain a protocol-matched coding benchmark for both Seed 1.8 and Sonar Deep Research, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.

Only Sonar Deep Research has a directly sourced input price: $2.00 per million tokens. Only Sonar Deep Research has a directly sourced output price: $8.00 per million tokens.

Neither model has a larger sourced context window in this comparison. Seed 1.8 is — and Sonar Deep Research is 128,000.

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 recorded self-hosting status: unsupported. Seed 1.8 is not marked open weight; Sonar Deep Research is not marked open weight.

Seed 1.8 is documented with image input; Sonar Deep Research is not documented with image input. This reflects supported input modalities, not vision quality.

Neither has a larger sourced maximum output. Seed 1.8 is — and Sonar Deep Research is —.

Seed 1.8: reasoning, tool calling, and image input. Sonar Deep Research: reasoning. Feature support does not establish relative quality.

Seed 1.8 has 0 sourced provider routes; 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.