Seed 2.1 Pro vs DeepSeek V4 Flash Base
Benchmark Performance
Available Benchmarks
Technical Differences
Side-by-Side Facts
| Field | Seed 2.1 Pro | DeepSeek-V4-Flash-Base |
|---|---|---|
| Developer | ByteDance Seed | DeepSeek |
| Family | Seed 2 1 | Deepseek V4 Flash Base |
| Model | Seed 2.1 Pro | DeepSeek-V4-Flash-Base |
| Version | Seed 2.1 Pro | DeepSeek-V4-Flash-Base |
| Lifecycle | active | active |
| Released | 2026-06-23 | 2026-04-24 |
| Knowledge cutoff | Unknown | Unknown |
| Input modalities | Text, Image, Video | Text |
| Output modalities | Text | Text |
| Context window | Unknown | 1,049K |
| Total parameters | Unknown | 292B |
| Active parameters | Unknown | Unknown |
| License | Unknown | Unknown |
| Open weights | No | Yes |
| API available | Yes | Unknown |
| Self-hostable | No | Yes |
| Provider access | Unknown | Unknown |
| Capabilities | agents, chat, computer-use, generation, reasoning, structured_outputs, tools | generation |
11 comparable fields · 9 material differences · Pair passes the primary-source comparison gate
Seed 2.1 Pro Capabilities
DeepSeek V4 Flash Base Capabilities
Internal Comparison Graph
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Primary Evidence
Sources and Freshness
Questions
Seed 2.1 Pro vs DeepSeek V4 Flash Base FAQs
Is Seed 2.1 Pro or DeepSeek V4 Flash Base better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Seed 2.1 Pro and DeepSeek V4 Flash Base, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Seed 2.1 Pro or DeepSeek V4 Flash Base?+
Neither model has a directly sourced input price in this comparison. Neither model has a directly sourced output price in this comparison.
Which has a larger context window, Seed 2.1 Pro or DeepSeek V4 Flash Base?+
Neither model has a larger sourced context window in this comparison. Seed 2.1 Pro is — and DeepSeek V4 Flash Base is 1,049K.
Which performs better in benchmarks, Seed 2.1 Pro or DeepSeek V4 Flash Base?+
There is no overall benchmark winner: At least two independently verified, protocol-matched benchmarks are required for an overall winner.
Can Seed 2.1 Pro or DeepSeek V4 Flash Base be self-hosted?+
DeepSeek V4 Flash Base is the only model in this pair currently marked as self-hostable. Seed 2.1 Pro is not marked open weight; DeepSeek V4 Flash Base is open weight.
Can Seed 2.1 Pro and DeepSeek V4 Flash Base understand images?+
Seed 2.1 Pro is documented with image input; DeepSeek V4 Flash Base is not documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Seed 2.1 Pro or DeepSeek V4 Flash Base?+
Neither has a larger sourced maximum output. Seed 2.1 Pro is — and DeepSeek V4 Flash Base is —.
Do Seed 2.1 Pro and DeepSeek V4 Flash Base support reasoning and tool use?+
Seed 2.1 Pro: reasoning, tool calling, and image input. DeepSeek V4 Flash Base: none of these features are definitively sourced. Feature support does not establish relative quality.
Which is available from more inference providers, Seed 2.1 Pro or DeepSeek V4 Flash Base?+
Seed 2.1 Pro has 0 sourced provider routes; DeepSeek V4 Flash Base has 0, a tie.
Which offers better value, Seed 2.1 Pro or DeepSeek V4 Flash Base?+
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.