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Claude Opus 4.8 vs Llama 3.1 8B

At a glance
AnthropicClaude Opus 4.8

Anthropic's most capable Opus yet, built for long-horizon autonomous agents and frontier coding.

891M ctx$5.00/$25.00 per M#4/92
MetaLlama 3.1 8B

Compact 8B model from Meta's Llama 3.1 series.

50131K ctx$0.02/$0.03 per M#76/92
AI Output
All AI outputs

No captured outputs for these models yet.

Benchmarks
See rankings
AnthropicClaude Opus 4.8
Reasoning
AgenticInsufficient data
Sources:Epoch ECI·Epoch AI·Provider·OpenRouter· as of 2026-07-10
Smarter
Capability
CapabilityECI89.2
Reasoning & Knowledge
Graduate Science91.0%Factual Recall39.5%
Math
Math Problems—Competition Math98.3%Research Math47.2%
Coding
Real-World Coding88.6%
Agentic
Novel Reasoning72.1%
MetaLlama 3.1 8B
CodingInsufficient data
AgenticInsufficient data
Sources:Epoch ECI·Epoch AI·OpenRouter· as of 2026-07-10
Cheaper
Capability
CapabilityECI50.3
Reasoning & Knowledge
Graduate Science25.9%Factual Recall—
Math
Math Problems22.9%Competition Math2.5%Research Math—
Coding
Real-World Coding—
Agentic
Novel Reasoning—
Specs
AnthropicClaude Opus 4.8
1M
Context
128K
Max output
May 2026
Released
MetaLlama 3.1 8B
131K
Context
16K
Max output
Jul 2024
Released
Capabilities
AnthropicClaude Opus 4.8
Vision
Audio
Reasoning
MetaLlama 3.1 8B
Vision
Audio
Reasoning
Pricing
AnthropicClaude Opus 4.8
Live pricing, shown before you run
Input$5.00/M tokens
Output$25.00/M tokens
Cache read$0.50/M tokens
Cache write$6.25/M tokens
Web search$0.01/search
MetaLlama 3.1 8B
Live pricing, shown before you run
Input$0.02/M tokens
Output$0.03/M tokens
Chat with Claude Opus 4.8Go to model
Chat with Llama 3.1 8BGo to model
Frequently Asked Questions: Claude Opus 4.8 vs Llama 3.1 8B▼

Which is better, Claude Opus 4.8 or Llama 3.1 8B?

▼

Based on the Capability Index, Claude Opus 4.8 scores higher (89.2 vs 50.3). However, "better" depends on your use case — pricing, speed, context window, and specific capability needs all matter.

Which is cheaper, Claude Opus 4.8 or Llama 3.1 8B?

▼

Llama 3.1 8B has a lower blended cost. Claude Opus 4.8: $5.00 input / $25.00 output. Llama 3.1 8B: $0.02 input / $0.03 output.

Which has a larger context window, Claude Opus 4.8 or Llama 3.1 8B?

▼

Claude Opus 4.8 has a larger context window: Claude Opus 4.8 supports 1M tokens vs Llama 3.1 8B at 131K tokens.

Do both Claude Opus 4.8 and Llama 3.1 8B support vision?

▼

Claude Opus 4.8 supports vision/image input, but Llama 3.1 8B does not.

What are the key differences between Claude Opus 4.8 and Llama 3.1 8B?

▼

Key differences: Claude Opus 4.8 has a notably higher capability index (38.9 point gap); Llama 3.1 8B is significantly cheaper; only Claude Opus 4.8 supports vision input; only Claude Opus 4.8 offers extended reasoning mode. Compare full specs on this page.

Which model should I choose for my use case?

▼

If cost is your priority, choose the cheaper option. If you need the highest intelligence for complex tasks, pick the higher-scoring model. For long documents or codebases, choose the larger context window. You can try both Claude Opus 4.8 and Llama 3.1 8B for free on idapt.app to see which performs better for your specific needs.

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