Seed 2.1 Pro vs Llama 3.1 405B
At a Glance
| Compare | Seed 2.1 ProByteDance Seed |  Llama 3.1 405BMeta |
|---|---|---|
| Pricing and Limits | ||
| Context windowMaximum documented tokens | Not reported | 131K |
| Model facts checked | Sep 3, 2026View model evidence → | Aug 28, 2026View model evidence → |
Token prices are the lowest available sourced USD rates; input and output may use different providers. Cost ranking estimates output spend on LiveBench, not a full request bill. Ranking methodology →
Available Benchmarks
Side-by-Side Facts
| Field | Seed 2.1 Pro | Llama-3.1-405B |
|---|---|---|
| Developer | ByteDance Seed | Meta |
| Family | Seed 2 1 | Llama 3 1 405b |
| Model | Seed 2.1 Pro | Llama-3.1-405B |
| Version | Seed 2.1 Pro | Llama-3.1-405B |
| Lifecycle | active | active |
| Released | 2026-06-23 | 2024-07-23 |
| Knowledge cutoff | Unknown | Unknown |
| Input modalities | Text, Image, Video | Text |
| Output modalities | Text | Text |
| Context window | Unknown | 131K |
| Total parameters | Unknown | 405.9B |
| Active parameters | Unknown | Unknown |
| License | Unknown | llama3.1 |
| Open weights | No | Yes |
| API available | Yes | Yes |
| Self-hostable | No | Yes |
| Provider access | Unknown | Together Ai (Standard) |
| Capabilities | agents, chat, computer-use, generation, reasoning, structured_outputs, tools | generation |
Seed 2.1 Pro Capabilities
Llama 3.1 405B Capabilities
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Primary Evidence
Sources and Freshness
Questions
Seed 2.1 Pro vs Llama 3.1 405B FAQs
Is Seed 2.1 Pro or Llama 3.1 405B better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Seed 2.1 Pro and Llama 3.1 405B, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Seed 2.1 Pro or Llama 3.1 405B?+
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 Llama 3.1 405B?+
Neither model has a larger sourced context window in this comparison. Seed 2.1 Pro is — and Llama 3.1 405B is 131K.
Which performs better in benchmarks, Seed 2.1 Pro or Llama 3.1 405B?+
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 Llama 3.1 405B be self-hosted?+
Llama 3.1 405B is the only model in this pair currently marked as self-hostable. Seed 2.1 Pro is not marked open weight; Llama 3.1 405B is open weight.
Can Seed 2.1 Pro and Llama 3.1 405B understand images?+
Seed 2.1 Pro is documented with image input; Llama 3.1 405B is not documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Seed 2.1 Pro or Llama 3.1 405B?+
Neither has a larger sourced maximum output. Seed 2.1 Pro is — and Llama 3.1 405B is —.
Do Seed 2.1 Pro and Llama 3.1 405B support reasoning and tool use?+
Seed 2.1 Pro: reasoning, tool calling, and image input. Llama 3.1 405B: 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 Llama 3.1 405B?+
Seed 2.1 Pro has 0 sourced provider routes; Llama 3.1 405B has 1, so Llama 3.1 405B has broader tracked availability.
Which offers better value, Seed 2.1 Pro or Llama 3.1 405B?+
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.