Seed 2.1 Pro vs DeepSeek V4 Flash
Model Markets Rankings
Intelligence, Cost, and Efficiency
| Ranking | Seed 2.1 Pro | DeepSeek-V4-Flash |
|---|---|---|
| IntelligenceHigher is better · MM Intelligence v1.2 | UnrankedNot in the 22-model eligible cohort | #19 of 2241.8 score |
| CostLower is better · Published-token output estimate | UnrankedNot in the 36-model eligible cohort | #2 of 36$0.0060 per LiveBench case |
| EfficiencyHigher is better · MM Efficiency v1.0 | UnrankedNot in the 22-model eligible cohort | #1 of 2270.9 score |
Ranks come from the current complete eligible cohorts. Green highlights appear only when both models are ranked in the same metric. Missing required inputs remain unranked, and the three dimensions are not collapsed into an overall winner.
Benchmark Performance
Available Benchmarks
Technical Differences
Side-by-Side Facts
| Field | Seed 2.1 Pro | DeepSeek-V4-Flash |
|---|---|---|
| Developer | ByteDance Seed | DeepSeek |
| Family | Seed 2 1 | Deepseek V4 Flash |
| Model | Seed 2.1 Pro | DeepSeek-V4-Flash |
| Version | Seed 2.1 Pro | DeepSeek-V4-Flash |
| 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 | 290.9B |
| Active parameters | Unknown | 13B |
| License | Unknown | mit |
| Open weights | No | Yes |
| API available | Yes | Yes |
| Self-hostable | No | Yes |
| Provider access | Unknown | DeepSeek (Standard), Deepinfra (Standard), Fireworks Ai (Standard), Hugging Face (Standard), Openrouter (Standard) |
| Capabilities | agents, chat, computer-use, generation, reasoning, structured_outputs, tools | chat, generation, reasoning |
12 comparable fields · 9 material differences · Pair passes the primary-source comparison gate
Seed 2.1 Pro Capabilities
DeepSeek V4 Flash Capabilities
Internal Comparison Graph
Related Comparisons
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|---|---|---|---|
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Claude Fable 5.1Anthropic | vs | Seed 2.1 ProByteDance Seed | cross-developer peersimage, text |
Seed 2.1 ProByteDance Seed | vs |  Gemini 3.1 ProGoogle DeepMind | cross-developer peerstext |
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Seed 2.1 ProByteDance Seed | vs | Grok 4.6xAI | cross-developer peersimage, text |
Seed 2.1 ProByteDance Seed | vs |  Qwen3.8-MaxQwen | cross-developer peersimage, text, video |
Seed 2.1 ProByteDance Seed | vs |  Kimi-K3Moonshot AI | cross-developer peersimage, text |
 MiniMax-M3MiniMax | vs | Seed 2.1 ProByteDance Seed | cross-developer peersimage, text |
Seed 2.1 ProByteDance Seed | vs |  GLM-5.3Z.ai | cross-developer peerstext |
Seed 2.1 ProByteDance Seed | vs |  Hy4 previewTencent | cross-developer peerstext |
Seed 2.1 ProByteDance Seed | vs |  Mistral Large 3Mistral AI | cross-developer peersimage, text |
Primary Evidence
Sources and Freshness
Questions
Seed 2.1 Pro vs DeepSeek V4 Flash FAQs
Is Seed 2.1 Pro or DeepSeek V4 Flash better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Seed 2.1 Pro and DeepSeek V4 Flash, 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?+
Only DeepSeek V4 Flash has a directly sourced input price: $0.0868 per million tokens. Only DeepSeek V4 Flash has a directly sourced output price: $0.1736 per million tokens.
Which has a larger context window, Seed 2.1 Pro or DeepSeek V4 Flash?+
Neither model has a larger sourced context window in this comparison. Seed 2.1 Pro is — and DeepSeek V4 Flash is 1,049K.
Which performs better in benchmarks, Seed 2.1 Pro or DeepSeek V4 Flash?+
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 be self-hosted?+
DeepSeek V4 Flash is the only model in this pair currently marked as self-hostable. Seed 2.1 Pro is not marked open weight; DeepSeek V4 Flash is open weight.
Can Seed 2.1 Pro and DeepSeek V4 Flash understand images?+
Seed 2.1 Pro is documented with image input; DeepSeek V4 Flash 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?+
Neither has a larger sourced maximum output. Seed 2.1 Pro is — and DeepSeek V4 Flash is —.
Do Seed 2.1 Pro and DeepSeek V4 Flash support reasoning and tool use?+
Seed 2.1 Pro: reasoning, tool calling, and image input. DeepSeek V4 Flash: reasoning. Feature support does not establish relative quality.
Which is available from more inference providers, Seed 2.1 Pro or DeepSeek V4 Flash?+
Seed 2.1 Pro has 0 sourced provider routes; DeepSeek V4 Flash has 5, so DeepSeek V4 Flash has broader tracked availability.
Which offers better value, Seed 2.1 Pro or DeepSeek V4 Flash?+
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.