LLM Reference

Claude Opus 4.5 vs Llama 3 8B Instruct

Claude Opus 4.5 (2025) and Llama 3 8B Instruct (2024) are frontier reasoning models from Anthropic and AI at Meta. Claude Opus 4.5 ships a 200k-token context window, while Llama 3 8B Instruct ships a 8k-token context window. On MMLU PRO, Claude Opus 4.5 leads by 48.4 pts. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.

Llama 3 8B Instruct is ~24900% cheaper at $0.02/1M; pay for Claude Opus 4.5 only for coding workflow support.

Decision scorecard

Local evidence first
SignalClaude Opus 4.5Llama 3 8B Instruct
Best forreasoning-heavy apps, multimodal apps, and tool-calling agentsprovider-routed production
Decision fitCoding, RAG, and AgentsCoding, Classification, and JSON / Tool use
Context window200k8k
Cheapest output$25/1M tokens$0.05/1M tokens
Provider routes6 tracked17 tracked
Shared benchmarksMMLU PRO leader2 shared

Decision tradeoffs

Choose Claude Opus 4.5 when...
  • Claude Opus 4.5 holds a shared-benchmark lead on MMLU PRO, ahead by 48.4 points.
  • Claude Opus 4.5 has the larger context window for long prompts, retrieval packs, or transcript analysis.
  • Claude Opus 4.5 uniquely exposes Vision, Multimodal, and Reasoning in local model data.
  • Local decision data tags Claude Opus 4.5 for Coding, RAG, and Agents.
Choose Llama 3 8B Instruct when...
  • Llama 3 8B Instruct has the lower cheapest tracked output price at $0.05/1M tokens.
  • Llama 3 8B Instruct has broader tracked provider coverage for fallback and route flexibility.
  • Local decision data tags Llama 3 8B Instruct for Coding, Classification, and JSON / Tool use.

Monthly cost at traffic

Estimate token spend from the cheapest tracked input and output route or tier on this page.

Lower estimate Llama 3 8B Instruct

Claude Opus 4.5

$10,250

Cheapest tracked route/tier: Microsoft Foundry

Llama 3 8B Instruct

$28.50

Cheapest tracked route/tier: DeepInfra

Estimated monthly gap: $10,222. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.

Switch friction

Claude Opus 4.5 -> Llama 3 8B Instruct
  • Provider overlap exists on AWS Bedrock, GCP Vertex AI, and Microsoft Foundry; start route-level A/B tests there.
  • Llama 3 8B Instruct is $24.95/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
  • Check replacement coverage for Vision, Multimodal, and Reasoning before moving production traffic.
Llama 3 8B Instruct -> Claude Opus 4.5
  • Provider overlap exists on Microsoft Foundry, GCP Vertex AI, and AWS Bedrock; start route-level A/B tests there.
  • Claude Opus 4.5 is $24.95/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
  • Claude Opus 4.5 adds Vision, Multimodal, and Reasoning in local capability data.

Specs

Specification
Released2025-11-012024-04-18
Context window200k8k
Parameters—8B
ArchitectureDecoder OnlyDecoder Only
LicenseProprietaryLlama 3 Community
OpennessProprietaryOpen weights
WeightsNot releasedAvailable
CodeUnknownUnknown
Commercial useCommercial use: conditionalCommercial use: conditional
Knowledge cutoff2025-122023-03

Pricing and availability

Pricing attributeClaude Opus 4.5Llama 3 8B Instruct
Input price$5/1M tokens$0.02/1M tokens
Output price$25/1M tokens$0.05/1M tokens
Providers
Microsoft FoundryAnthropicGCP Vertex AIAWS BedrockOpenRouterVercel AI Gateway
AWS BedrockDeepInfraOctoAI API (Deprecated)Fireworks AIAlibaba Cloud PAI-EASBaseten API

Capabilities

CapabilityClaude Opus 4.5Llama 3 8B Instruct
VisionYesNo
MultimodalYesNo
ReasoningYesNo
JSON / Tool useYesNo
Structured outputsYesYes
Code executionYesNo
IDE integrationNoNo
Computer useNoNo
Parallel agentsNoNo

Benchmarks

BenchmarkClaude Opus 4.5Llama 3 8B Instruct
MMLU PRO88.940.5
Google-Proof Q&A87.044.8

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Last reviewed: 2026-07-26. Data sourced from public model cards and provider documentation.