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Head-to-Head Model Comparison

Llama 3 (8B) vs Llama 3 (70B)

Benchmarks, API Token Pricing, Context Window & Speed Comparison

由 GetInfoUs 研究团队审核最后审核日期：October 2026编辑政策
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AI CompareAI BenchmarkToken PricingModel CostModel SpecsSWE-bench CodingModel VersusWhich AI ModelLLM Speed & LatencyReasoning ModelsExtended ThinkingPrompt Caching ROI
Llama 3 (8B) vs Llama 3 (70B): Benchmarks, Pricing & Speed Comparison

Meta 的 Llama 3 (8B) 与 Meta 的 Llama 3 (70B) 是当前备受关注的两款主力 AI 模型。Llama 3 (8B) 提供 8.2K Token 上下文窗口，API 定价为每百万 Token 输入 $0.05 / 输出 $0.10；而 Llama 3 (70B) 提供 8.2K Token 上下文窗口，定价为每百万 Token 输入 $0.35 / 输出 $0.80。以下为两者的基准测试、延迟与成本全面对比。

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Meta

Llama 3 (8B)

超高速低延迟推理

Meta 推出的 Llama 3 (8B) 是一款面向实时交互对话、高并发路由与极低延迟生产环境的超高速大模型，具备 8K 上下文窗口、210 Token/秒生成速度与 34/100 综合智能指数（每百万 Token $0.05 输入 / $0.1 输出）。

Intelligence Index34 / 100
Input Token:

$0.05 / 1M

Output Token:

$0.10 / 1M

Context Window:

8.2K tokens

SWE-bench Verified:

12%

Meta

Llama 3 (70B)

开源权重基础大模型

Meta 推出的 Llama 3 (70B) 是一款支持私有云服务器自托管、微调与完全数据主权的开源权重基础大模型，具备 8K 上下文窗口、110 Token/秒生成速度与 42/100 综合智能指数（每百万 Token $0.35 输入 / $0.8 输出）。

Intelligence Index42 / 100
Input Token:

$0.35 / 1M

Output Token:

$0.80 / 1M

Context Window:

8.2K tokens

SWE-bench Verified:

24%

核心差异一览

  • Llama 3 (8B) is 7.5x cheaper for API usage (input + output tokens combined).
  • Llama 3 (8B) is faster at 210 tok/s vs 110 tok/s.
  • Llama 3 (70B) leads on SWE-bench coding (24.0% vs 12.0%).
Need definitions for token pricing, context, or benchmarks?Explore AI Glossary →
FeatureLlama 3 (8B)Llama 3 (70B)
Intelligence Index
Composite reasoning & knowledge score (0-100)
3442
Provider
MetaMeta
Input Price
Cost per million input tokens
$0.05 / 1M$0.35 / 1M
Output Price
Cost per million output tokens
$0.10 / 1M$0.80 / 1M
Blended Price
Weighted 7:2:1 cache:input:output per 1M
$0.03 / 1M$0.21 / 1M
Context Window
Maximum input + output tokens
8.2K tokens~12 A4 pages of text8.2K tokens~12 A4 pages of text
Max Output Tokens
Per single request
4K4K
Throughput Speed
Tokens generated per second
210 tok/s110 tok/s
SWE-bench Verified
Real-world software engineering
12%24%
GPQA Diamond
Graduate-level reasoning
34.2%46%
Cached Input Price
Prompt caching discount per 1M tokens
$0.01 / 1M$0.09 / 1M

各项指标谁更胜一筹？

At-a-glance decision framework
Coding
Llama 3 (70B)
+12.0% SWE-bench lead
Cost
Llama 3 (8B)
7.5x cheaper monthly runtime
Speed
Llama 3 (8B)
+91% faster generation
Context
Tied
8.2K tokens window

权威基准测试得分对比

Official evaluation metrics verified by independent third-party research labs.

Llama 3 (8B)Llama 3 (70B)
SWE-bench Verified (Autonomous Coding)

Industry benchmark evaluating real-world GitHub issue resolution and multi-file debugging.

12%vs24%
GPQA Diamond (Doctorate-Level Science & Math)

Challenging questions created by domain experts to test complex PhD-level reasoning.

34.2%vs46%
MMLU-Pro (Multi-task Language Understanding)

Hardened reasoning and academic knowledge benchmark with reduced lucky-guess probability.

62.5%vs72%
LMSYS Chatbot Arena Elo

Crowdsourced human preference evaluation based on blind, head-to-head model battles.

1150ptsvs1245pts
Generation Speed (Throughput)

Tokens emitted per second during active generation streaming.

210 tok/s vs110 tok/s

延迟与响应速度

Time to first token (TTFT) and estimated end-to-end response time for a typical 500-token response.

Time to First Token (TTFT)Lower is better
Llama 3 (8B)0.22s
Llama 3 (70B)0.42s
Est. End-to-End Response (500 tokens)TTFT + generation time
Llama 3 (8B)2.60s
Llama 3 (70B)4.97s

实时 Token 成本模拟器

Adjust sliders to calculate projected monthly cloud API spending with prompt caching discounts.

100K / day
10K500K1M
30K / day
5K150K300K
50% cached
0% (Cold)50%90% (Warm)
Llama 3 (8B) Monthly API Bill
$0.18 / month
$0.05/1M in · $0.1/1M out
Llama 3 (70B) Monthly API Bill
$1.38 / month
$0.35/1M in · $0.8/1M out
Llama 3 (8B) saves approximately $1.19 / month (87%) under this workload.7.5x Savings

Llama 3 (8B) · Strengths & Key Advantages

  • 提供 8K 上下文窗口与最高 4K 输出容量，核心基准表现优异（SWE-bench Verified 12% · GPQA Diamond 34.2%）
  • 高达 210 Token/秒的生成吞吐量，首字延迟 (TTFT) 仅约 220 毫秒
  • 开放模型权重 (8B)，支持通过 vLLM、SGLang 或 Ollama 在私有 GPU 集群上本地部署与微调
Considerations & Trade-offs
  • 在本地以满血精度运行需要较高的 GPU 显存 (VRAM) 与运维基础设施
  • 在超长链路的前沿科研推导任务上，深度略逊于顶配重型旗舰推理模型

Llama 3 (70B) · Strengths & Key Advantages

  • 提供 8K 上下文窗口与最高 4K 输出容量，核心基准表现优异（SWE-bench Verified 24% · GPQA Diamond 46%）
  • 高达 110 Token/秒的生成吞吐量，首字延迟 (TTFT) 仅约 420 毫秒
  • 开放模型权重 (70B)，支持通过 vLLM、SGLang 或 Ollama 在私有 GPU 集群上本地部署与微调
Considerations & Trade-offs
  • 在本地以满血精度运行需要较高的 GPU 显存 (VRAM) 与运维基础设施
  • 在超长链路的前沿科研推导任务上，深度略逊于顶配重型旗舰推理模型

Token Use & Task Economics

Estimated cost and token consumption to complete one representative agentic task.

MetricLlama 3 (8B)Llama 3 (70B)
Cost per Task
Estimated USD to finish one task
$0.20$0.20
Output Tokens / Task
Tokens generated per task
24K24K
Reasoning Tokens / Task
Thinking tokens burned per task
0K0K

技术规格参数

Architecture, release timeline, capabilities, and modalities.

FeatureLlama 3 (8B)Llama 3 (70B)
Official API Model ID (SDK)meta-llama/Llama-3-(8B)meta-llama/Llama-3-(70B)
API ProtocolOpenAI-Compatible REST / vLLM / SGLang / HuggingFace TGIOpenAI-Compatible REST / vLLM / SGLang / HuggingFace TGI
Release Date2024-042024-04
Knowledge CutoffMarch 2024March 2024
ArchitectureDense GQA Transformer with 128K TokenizerGQA High-Capacity Transformer
Parameters8B70B
Enterprise Rate Limits (RPM / TPM)Unlimited (Hardware-bound on self-hosted GPU) / 10,000 RPM Cloud · Unlimited local throughput / 10M+ TPM Managed CloudUnlimited (Hardware-bound on self-hosted GPU) / 10,000 RPM Cloud · Unlimited local throughput / 10M+ TPM Managed Cloud
Long-Context Tier (>128K/200K)Flat rate ($0.05/1M in) across full 8K windowFlat rate ($0.35/1M in) across full 8K window
Prompt Cache Policy & TTLCached input at $0.0125/1M tokensCached input at $0.0875/1M tokens
Computer Use / GUI AgentAPI / CLI Tool-Use & DOM Agent ready (no raw pixel desktop click loop)API / CLI Tool-Use & DOM Agent ready (no raw pixel desktop click loop)
MCP & Parallel Tool CallingNative MCP Client/Server ready · Parallel function calling · 100% Strict JSON SchemaNative MCP Client/Server ready · Parallel function calling · 100% Strict JSON Schema
Web Search Grounding & SandboxSupported via external Tavily/Exa Search & E2B/Docker Sandbox toolsSupported via external Tavily/Exa Search & E2B/Docker Sandbox tools
Official Fine-Tuning SupportFull Weights SFT, LoRA, QLoRA, DPO & GRPO RL (Unsloth / Axolotl / Llama-Factory)Full Weights SFT, LoRA, QLoRA, DPO & GRPO RL (Unsloth / Axolotl / Llama-Factory)
Multimodal Token BillingText BPE (~4 chars/token)Text BPE (~4 chars/token)
Quantization & Min GPU VRAMBF16 / FP16, FP8 Dynamic, INT4 AWQ / GPTQ, GGUF (Q4_K_M / Q8_0) · 5 GB VRAM (4-bit Quantized) · 17 GB VRAM (Native BF16)BF16 / FP16, FP8 Dynamic, INT4 AWQ / GPTQ, GGUF (Q4_K_M / Q8_0) · 43 GB VRAM (4-bit Quantized) · 151 GB VRAM (Native BF16)
Safety & Frontier ClassificationOpen-Weights System Card + Customizable Guardrail Layer (Llama Guard / ShieldGemma)Open-Weights System Card + Customizable Guardrail Layer (Llama Guard / ShieldGemma)
Enterprise Compliance (ZDR/HIPAA/SOC2)100% Air-Gapped On-Premises / Private VPC · Full HIPAA, GDPR & SOC2 Control100% Air-Gapped On-Premises / Private VPC · Full HIPAA, GDPR & SOC2 Control
Input Modalitiestexttext
Output Modalitiestexttext

Llama 3 (8B) vs Llama 3 (70B): 常见问题解答 (FAQ)

Which is more intelligent, Llama 3 (8B) or Llama 3 (70B)?

Llama 3 (70B) is more intelligent. It scores 42 compared with 34 on the composite Intelligence Index.

Which model is faster?

Llama 3 (8B) is faster, generating 210 tokens per second compared with 110 tokens per second.

Which model is cheaper to run?

Llama 3 (8B) is cheaper at $0.03 per 1M tokens blended, compared with $0.21 (7:2:1 cache:input:output ratio).

Which model has lower latency?

Llama 3 (8B) has lower latency, with a time to first token of 0.22s compared with 0.42s.

综合结论

综合来看，Llama 3 (8B)（适合：面向实时交互对话、高并发路由与极低延迟生产环境的超高速任务、企业级 RAG 检索增强生成、自动化智能体工作流与高可靠 API 集成。）与 Llama 3 (70B)（适合：支持私有云服务器自托管、微调与完全数据主权的开源权重基础任务、企业级 RAG 检索增强生成、自动化智能体工作流与高可靠 API 集成。）各具优势：Llama 3 (70B) 在综合智能与编程基准测试中表现更强，Llama 3 (8B) 拥有更快的 Token 生成速度，而 Llama 3 (8B) 则在规模化 API 部署中具备更高的成本效益。

常见问题 (FAQ)

在编程和深度推理方面，Llama 3 (8B) 和 Llama 3 (70B) 哪个更强？+

在综合智能指数与编程基准评测中，Llama 3 (70B) 表现占优。建议结合上方的 SWE-bench Verified 与 GPQA Diamond 跑分根据具体场景选择。

Llama 3 (8B) 与 Llama 3 (70B) 的 API 价格哪个更便宜？+

Llama 3 (8B) 的 API 价格为输入 $0.05 / 输出 $0.10（每百万 Token），Llama 3 (70B) 为输入 $0.35 / 输出 $0.80。综合混合成本来看，Llama 3 (8B) 更具性价比。

哪款模型拥有更大的上下文窗口和更快的响应速度？+

Llama 3 (8B) 支持 8.2K Token 上下文窗口，而 Llama 3 (70B) 支持 8.2K Token。在流式生成速度方面，Llama 3 (8B) 的吞吐表现更快。

AI Terminology & Guide
Explore Glossary →

Understand key metrics like context window, token pricing, reasoning mode, and SWE-bench scores in our comprehensive AI glossary.

Tokens & PricingContext WindowAI BenchmarksReasoning ModelsTool CallingModel Context Protocol (MCP)

Related reading

Benchmark scores, token prices, and rate limits evolve rapidly as AI labs release model updates. Always verify current specifications and pricing on the official provider documentation.

数据来源: Meta 与 Meta 官方 API 文档、模型发布说明及独立基准测试报告 (2026)。