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Anthropic: Claude Opus 4.8

Anthropic

flagship

Capabilities

VisionToolsStructured OutputExtended ThinkingLong ContextCode

Strengths

  • Exceptional reasoning and analysis across domains
  • 1M context window for long-document processing
  • Strong multimodal vision capabilities
  • Extended thinking support for complex tasks
  • Excellent structured output and tool use

Weaknesses

  • Very slow inference (72 tok/s) limits real-time applications
  • Premium pricing with $25/M output cost
  • Closed-source limits transparency and auditability
  • No self-hosting option for data control

Pricing

Input / 1M tokens

$5

Output / 1M tokens

$25

Context window

1,000k

Transparency

Open weights

0.0 / 10

Open training data

0.0 / 10

Open methodology

3.5 / 10

Licence openness

2.0 / 10

Provider disclosure

4.5 / 10

FMTI company score

N/A

Composite:4.0 / 10

Closed-source model with limited public methodology disclosure. Anthropic publishes some safety research but training details remain proprietary. Standard commercial licensing.

Sustainability

Inference energy

2.3 / 10

Training footprint

N/A

Provider infrastructure

5.5 / 10

Composite:3.9 / 10

Anthropic's infrastructure sustainability commitments are not well-documented publicly. Large model size suggests high inference energy costs. No confirmed green energy partnerships.

Task Fitness

question answering
93%
code
93%
mathematics
50%
business communication
50%
vision
85%
analysis
92%
extraction
70%
long-form generation
88%
research
50%
reasoning
93%
summarisation
90%
translation
87%
conversation
89%