# GPT-5 nano vs Llama 3.1 405B

> Side-by-side benchmark comparison for GPT-5 nano and Llama 3.1 405B across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-5-nano-vs-llama-3-1-405b
- Last updated: September 4, 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 GPT-5 nano and Llama 3.1 405B.

## Summary

- GPT-5 nano and Llama 3.1 405B 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 | GPT-5 nano | Llama 3.1 405B |
|----------|----------|----------|
| Creator | OpenAI | Meta |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Non-Reasoning |
| Context | 400K | 128K |
| Independent public score (not head-to-head) | 39.72 | 36.49 |
| Benchmarks Covered | 0 | 0 |
| Pricing (input/output) | $0.05 / $0.40 | $0.00 / $0.00 |

## Category Breakdown

## FAQ

### Can I compare GPT-5 nano and Llama 3.1 405B 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

- [GPT-5 nano vs GPT-5 (high)](/compare/gpt-5-high-vs-gpt-5-nano)
- [Llama 3.1 405B vs GPT-5 (high)](/compare/gpt-5-high-vs-llama-3-1-405b)
- [GPT-5 nano vs GPT-5 (medium)](/compare/gpt-5-medium-vs-gpt-5-nano)
- [Llama 3.1 405B vs GPT-5 (medium)](/compare/gpt-5-medium-vs-llama-3-1-405b)

## Explore More

- [GPT-5 nano profile](/models/gpt-5-nano)
- [Llama 3.1 405B profile](/models/llama-3-1-405b)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)