DeepSeek V4 Flash Base vs Sonar

This comparison does not currently contain a protocol-matched coding benchmark for both DeepSeek V4 Flash Base and Sonar, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.

Only Sonar has a directly sourced input price: $1.00 per million tokens. Only Sonar has a directly sourced output price: $1.00 per million tokens.

DeepSeek V4 Flash Base has the larger sourced context window. DeepSeek V4 Flash Base supports 1,049K and Sonar supports 128K.

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

DeepSeek V4 Flash Base is the only model in this pair currently marked as self-hostable. DeepSeek V4 Flash Base is open weight; Sonar is not marked open weight.

DeepSeek V4 Flash Base is not documented with image input; Sonar is not documented with image input. This reflects supported input modalities, not vision quality.

Neither has a larger sourced maximum output. DeepSeek V4 Flash Base is — and Sonar is —.

DeepSeek V4 Flash Base: none of these features are definitively sourced. Sonar: none of these features are definitively sourced. Feature support does not establish relative quality.

DeepSeek V4 Flash Base has 0 sourced provider routes; Sonar has 2, so Sonar 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.