# Llama 3.1 405B vs Seed 1.6 Flash

> Side-by-side benchmark comparison for Llama 3.1 405B and Seed 1.6 Flash across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/llama-3-1-405b-vs-seed-1-6-flash
- Last updated: September 10, 2026

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for Llama 3.1 405B and Seed 1.6 Flash.

## Summary

- Llama 3.1 405B and Seed 1.6 Flash do not currently share a sourced benchmark row. The mirror therefore compares metadata, pricing, context windows, and each model's separately reported coverage without naming a benchmark winner.

## Model Snapshot

| Property | Llama 3.1 405B | Seed 1.6 Flash |
|----------|----------|----------|
| Creator | Meta | ByteDance |
| Type | Open Weight | Proprietary |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 128K | 256K |
| Independent public score (not head-to-head) | 36.59 | 43.56 |
| Benchmarks Covered | 0 | 0 |
| Pricing (input/output) | $0.00 / $0.00 | Pricing unavailable / Pricing unavailable |

## Category Breakdown

## FAQ

### Can I compare Llama 3.1 405B and Seed 1.6 Flash on BenchLM yet?

Not fully yet. BenchLM is tracking both models, but sourced benchmark coverage is still incomplete for a fair score-level comparison.

### Why does this page show "coming soon" values?

BenchLM only calls winners when public benchmark coverage is available on both sides of the comparison.

## Related Comparisons

- [Llama 3.1 405B vs Seed 1.6](/compare/llama-3-1-405b-vs-seed-1-6)
- [Seed 1.6 Flash vs Seed 1.6](/compare/seed-1-6-vs-seed-1-6-flash)
- [Llama 3.1 405B vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-llama-3-1-405b)
- [Seed 1.6 Flash vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-seed-1-6-flash)

## Explore More

- [Llama 3.1 405B profile](/models/llama-3-1-405b)
- [Seed 1.6 Flash profile](/models/seed-1-6-flash)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)