Compare/Llama 3.1 Instruct 405B vs Qwen3 Next 80B A3B (Reasoning)

Llama 3.1 Instruct 405BvsQwen3 Next 80B A3B (Reasoning)

Side-by-side comparison of pricing, 12 benchmarks, and generation speed.

Meta

Llama 3.1 Instruct 405B

Input
$2.75/M
Output
$6.5/M
Speed
31 tok/s
TTFT
0.47s
Alibaba

Qwen3 Next 80B A3B (Reasoning)

Input
$0.5/M
Output
$6/M
Speed
151 tok/s
TTFT
1.01s

Winner by Category

Cheaper
Qwen3 Next 80B A3B (Reasoning)
Faster (tok/s)
Qwen3 Next 80B A3B (Reasoning)
Lower Latency
Llama 3.1 Instruct 405B
Benchmarks (1-11)
Qwen3 Next 80B A3B (Reasoning)

Pricing Comparison

MetricLlama 3.1 Instruct 405BQwen3 Next 80B A3B (Reasoning)
Input ($/M tokens)$2.75$0.5
Output ($/M tokens)$6.5$6
Cost for 1M input + 100K output tokens:
Llama 3.1 Instruct 405B$3.40
Qwen3 Next 80B A3B (Reasoning)$1.10

Speed Comparison

Output Speed (tokens/s) — higher is better
Llama 3.1 Instruct 405B
31 tok/s
Qwen3 Next 80B A3B (Reasoning)
151 tok/s
Time to First Token (seconds) — lower is better
Llama 3.1 Instruct 405B
0.47s
Qwen3 Next 80B A3B (Reasoning)
1.01s

Benchmark Comparison

Data from Artificial Analysis API — 12 benchmarks

Intelligence Index
17.426.7
Coding Index
14.519.5
Math Index
3.084.3
GPQA Diamond
51.5%75.9%
MMLU-Pro
73.2%82.4%
LiveCodeBench
30.5%78.4%
AIME 2025
3.0%84.3%
MATH-500
70.3%
Humanity's Last Exam
4.2%11.7%
SciCode
29.9%38.8%
IFBench
39.0%60.7%
TerminalBench
6.8%9.8%
Llama 3.1 Instruct 405B1 wins
11 winsQwen3 Next 80B A3B (Reasoning)

Frequently Asked Questions

Which is cheaper, Llama 3.1 Instruct 405B or Qwen3 Next 80B A3B (Reasoning)?

Qwen3 Next 80B A3B (Reasoning) is cheaper overall. Its blended price (3:1 input/output ratio) is $1.88/M tokens vs $3.69/M for Llama 3.1 Instruct 405B.

Which model performs better on benchmarks?

Qwen3 Next 80B A3B (Reasoning) wins 11 out of 12 benchmarks compared to 1 for Llama 3.1 Instruct 405B. See the detailed benchmark chart above for per-category results.

Which is faster for real-time applications?

Qwen3 Next 80B A3B (Reasoning) generates tokens faster at 151 tok/s vs 31 tok/s. Llama 3.1 Instruct 405B also has lower time-to-first-token (0.47s vs 1.01s).

When should I use Llama 3.1 Instruct 405B vs Qwen3 Next 80B A3B (Reasoning)?

Choose based on your priorities: Qwen3 Next 80B A3B (Reasoning) for lower cost, Qwen3 Next 80B A3B (Reasoning) for stronger benchmark performance, and Qwen3 Next 80B A3B (Reasoning) for faster generation. For latency-sensitive apps, check the TTFT comparison above.